U.S. patent application number 15/691243 was filed with the patent office on 2017-12-14 for compositions and methods to control insect pests.
This patent application is currently assigned to PIONEER HI-BRED INTERNATIONAL, INC.. The applicant listed for this patent is E. I. DU PONT DE NEMOURS AND COMPANY, PIONEER HI-BRED INTERNATIONAL, INC.. Invention is credited to SCOTT DIEHN, XU HU, JAMES PRESNAIL, LISA PROCYK, NINA RICHTMAN, MICHELLE VAN ALLEN.
Application Number | 20170355991 15/691243 |
Document ID | / |
Family ID | 51529996 |
Filed Date | 2017-12-14 |
United States Patent
Application |
20170355991 |
Kind Code |
A1 |
HU; XU ; et al. |
December 14, 2017 |
COMPOSITIONS AND METHODS TO CONTROL INSECT PESTS
Abstract
Methods and compositions are provided which employ a silencing
element that, when ingested by a pest, such as a Coleopteran plant
pest or a Diabrotica plant pest, decrease the expression of a
target sequence in the pest. In specific embodiments, the decrease
in expression of the target sequence controls the pest and thereby
the methods and compositions are capable of limiting damage to a
plant. The present invention provides various target
polynucleotides set forth in any one of SEQ ID NOS: disclosed
herein, (but not including the forward and reverse primers.) or
active variants and fragments thereof, or complements thereof,
wherein a decrease in expression of one or more of the sequences in
the target pest controls the pest (i.e., has insecticidal
activity). Further provided are silencing elements which when
ingested by the pest decrease the level of the target polypeptide
and thereby control the pest. In specific embodiments, the pest is
D. virgifera virgifera, D. barberi, D. virgifera zeae, D. speciosa,
D. speciosa, or D. undecimpunctata howardi. Plants, plant parts,
bacteria and other host cells comprising the silencing elements or
an active variant or fragment thereof of the invention are also
provided.
Inventors: |
HU; XU; (JOHNSTON, IA)
; PRESNAIL; JAMES; (ST LOUIS, MO) ; RICHTMAN;
NINA; (JOHNSTON, IA) ; DIEHN; SCOTT; (WEST DES
MOINES, IA) ; VAN ALLEN; MICHELLE; (URBANDALE,
IA) ; PROCYK; LISA; (ANKENY, IA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PIONEER HI-BRED INTERNATIONAL, INC.
E. I. DU PONT DE NEMOURS AND COMPANY |
JOHNSTON
WILMINGTON |
IA
DE |
US
US |
|
|
Assignee: |
PIONEER HI-BRED INTERNATIONAL,
INC.
JOHNSTON
IA
E. I. DU PONT DE NEMOURS AND COMPANY
WILMINGTON
DE
|
Family ID: |
51529996 |
Appl. No.: |
15/691243 |
Filed: |
August 30, 2017 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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13831230 |
Mar 14, 2013 |
|
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15691243 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
C12N 15/113 20130101;
C12N 15/8286 20130101; A01N 63/10 20200101; Y02A 40/162 20180101;
Y02A 40/146 20180101; C12N 2310/531 20130101; C12N 15/8218
20130101; C12N 2310/14 20130101; A01N 37/46 20130101 |
International
Class: |
C12N 15/113 20100101
C12N015/113; C12N 15/82 20060101 C12N015/82; A01N 37/46 20060101
A01N037/46; A01N 63/02 20060101 A01N063/02 |
Claims
1. An isolated polynucleotide comprising a nucleotide sequence
comprising: (a) the nucleotide sequence comprising any one of SEQ
ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32,
33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61,
64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96,
97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117, 120, 121,
124, 125, 128, 129, 132, 133, 136, 137, 140, 141, 144, 145, 148,
149, 152, 153, 156, 157, 160, 161, 164, 165, 168, 169, 172, 173,
176, 177, 180, 181, 184, 185, 188, 189, 192, 193, 196, 197, 200,
201, 204, 205, 208, 209, 212, 213, 216, 217, 220, 221, 224, 225,
228, 229, 232, 233, 236, 237, 240, 241, 244, 245, 248, 249, 252,
253, 256, 257, 260, 261, 264, 265, 268, 269, 272, 273, 276, 277,
280, 281, 284, 285, 288, 289, 292, 293, 296, 297, 300, 301, 304,
305, 308, 309, 312, 313, 316, 317, 320, 321, 324, 325, 328, 329,
332, 333, 336, 337, 340, 341, 344, 345, 348, 349, 352, 353, 356,
357, 360, 361, 364, 365, 368, 369, 372, 373, 376, 377, 380, 381,
384, 385, 388, 389, 392, 393, 396, 397, 400, 401, 404, 405, 408,
409, 412, 413, 416, 417, 420, 421, 424, 425, 428, 429, 432, 433,
436, 437, 440, 441, 444, 445, 448, 449, 452, 453, 456, 457, 460,
461, 464, 465, 468, 469, 472, 473, 476, 477, 480, 481, 484, 485,
488, 489, 492, 493, 496, 497, 500, 501, 504, 505, 508, 509, 512,
513, 516, 517, 520, 521, 524, 525, 528, 529, 532, 533, 536, 537,
540, 541, 544, 545, 548, 549, 552, 553, 556, 557, 560, 561, 562,
563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575,
576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588,
589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601,
602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614,
615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627,
628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640,
641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653,
654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666,
667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679,
680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721, or active variants and
fragments thereof, and complements thereof, including, for example,
SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145,
149, 153, 157, 169, 173, 181, 185, 189, 205, 217, 225, 233, 561,
562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574,
575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587,
588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600,
601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613,
614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626,
627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639,
640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652,
653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665,
666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678,
679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691,
692, and active variants and fragments thereof, and complements
thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697,
700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718,
719, 720, 721 and active variants and fragments thereof, and
complements thereof, wherein said polynucleotide encodes a
silencing element having insecticidal activity against a Coleoptera
plant pest. (b) the nucleotide sequence comprising at least 90%
sequence identity to any one of nucleotides SEQ ID NOS: 1, 4, 5, 8,
9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41,
44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72,
73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100, 101, 104,
105, 108, 109, 112, 113, 116, 117, 120, 121, 124, 125, 128, 129,
132, 133, 136, 137, 140, 141, 144, 145, 148, 149, 152, 153, 156,
157, 160, 161, 164, 165, 168, 169, 172, 173, 176, 177, 180, 181,
184, 185, 188, 189, 192, 193, 196, 197, 200, 201, 204, 205, 208,
209, 212, 213, 216, 217, 220, 221, 224, 225, 228, 229, 232, 233,
236, 237, 240, 241, 244, 245, 248, 249, 252, 253, 256, 257, 260,
261, 264, 265, 268, 269, 272, 273, 276, 277, 280, 281, 284, 285,
288, 289, 292, 293, 296, 297, 300, 301, 304, 305, 308, 309, 312,
313, 316, 317, 320, 321, 324, 325, 328, 329, 332, 333, 336, 337,
340, 341, 344, 345, 348, 349, 352, 353, 356, 357, 360, 361, 364,
365, 368, 369, 372, 373, 376, 377, 380, 381, 384, 385, 388, 389,
392, 393, 396, 397, 400, 401, 404, 405, 408, 409, 412, 413, 416,
417, 420, 421, 424, 425, 428, 429, 432, 433, 436, 437, 440, 441,
444, 445, 448, 449, 452, 453, 456, 457, 460, 461, 464, 465, 468,
469, 472, 473, 476, 477, 480, 481, 484, 485, 488, 489, 492, 493,
496, 497, 500, 501, 504, 505, 508, 509, 512, 513, 516, 517, 520,
521, 524, 525, 528, 529, 532, 533, 536, 537, 540, 541, 544, 545,
548, 549, 552, 553, 556, 557, 560, 561, 562, 563, 564, 565, 566,
567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578, 579,
580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591, 592,
593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604, 605,
606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618,
619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630, 631,
632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643, 644,
645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656, 657,
658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669, 670,
671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682, 683,
684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695, 696,
697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715,
718, 719, 720, 721, or active variants and fragments thereof, and
complements thereof, including, for example, SEQ ID NOS: 1, 9, 37,
45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149, 153, 157, 169,
173, 181, 185, 189, 205, 217, 225, 233, 561, 562, 563, 564, 565,
566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578,
579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591,
592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604,
605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617,
618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630,
631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643,
644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656,
657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669,
670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682,
683, 684, 685, 686, 687, 688, 689, 690, 691, 692, and active
variants and fragments thereof, and complements thereof, and SEQ ID
NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721 and
active variants and fragments thereof, and complements thereof,
wherein said polynucleotide encodes a silencing element having
insecticidal activity against a Coleoptera plant pest; or (c) the
nucleotide sequence comprising at least 19 consecutive nucleotides
of any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21,
24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54,
55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85,
88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113,
116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140,
141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165,
168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192,
193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217,
220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244,
245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269,
272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296,
297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321,
324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348,
349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373,
376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400,
401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425,
428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452,
453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477,
480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504,
505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529,
532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556,
557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or
active variants and fragments thereof, and complements thereof,
including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77,
101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189,
205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, and active variants and fragments
thereof, and complements thereof, and SEQ ID NOS: 4, 140, 144, 148,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721 and active variants and
fragments thereof, and complements thereof; wherein said
polynucleotide encodes a silencing element having insecticidal
activity against a Coleoptera plant pest.
2. The isolated polynucleotide of claim 1, wherein said Coleoptera
plant pest is a Diabrotica plant pest.
3. An expression cassette comprising the polynucleotide of claim
1.
4. The expression cassette of claim 3, wherein said polynucleotide
is operably linked to a heterologous promoter.
5. The expression cassette of claim 3, wherein said polynucleotide
is expressed as a double stranded RNA.
6. The expression cassette of claim 3, wherein said polynucleotide
comprise a silencing element which is expressed as a hairpin
RNA.
7. The expression cassette of claim 6, wherein the silencing
element comprises, in the following order, a first segment, a
second segment, and a third segment, wherein a) said first segment
comprises at least about 19 nucleotides having at least 90%
sequence complementarity to a target sequence set forth in any one
of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28,
29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57,
60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92,
93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117, 120,
121, 124, 125, 128, 129, 132, 133, 136, 137, 140, 141, 144, 145,
148, 149, 152, 153, 156, 157, 160, 161, 164, 165, 168, 169, 172,
173, 176, 177, 180, 181, 184, 185, 188, 189, 192, 193, 196, 197,
200, 201, 204, 205, 208, 209, 212, 213, 216, 217, 220, 221, 224,
225, 228, 229, 232, 233, 236, 237, 240, 241, 244, 245, 248, 249,
252, 253, 256, 257, 260, 261, 264, 265, 268, 269, 272, 273, 276,
277, 280, 281, 284, 285, 288, 289, 292, 293, 296, 297, 300, 301,
304, 305, 308, 309, 312, 313, 316, 317, 320, 321, 324, 325, 328,
329, 332, 333, 336, 337, 340, 341, 344, 345, 348, 349, 352, 353,
356, 357, 360, 361, 364, 365, 368, 369, 372, 373, 376, 377, 380,
381, 384, 385, 388, 389, 392, 393, 396, 397, 400, 401, 404, 405,
408, 409, 412, 413, 416, 417, 420, 421, 424, 425, 428, 429, 432,
433, 436, 437, 440, 441, 444, 445, 448, 449, 452, 453, 456, 457,
460, 461, 464, 465, 468, 469, 472, 473, 476, 477, 480, 481, 484,
485, 488, 489, 492, 493, 496, 497, 500, 501, 504, 505, 508, 509,
512, 513, 516, 517, 520, 521, 524, 525, 528, 529, 532, 533, 536,
537, 540, 541, 544, 545, 548, 549, 552, 553, 556, 557, 560, 561,
562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574,
575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587,
588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600,
601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613,
614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626,
627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639,
640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652,
653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665,
666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678,
679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691,
692, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708,
709, 712, 713, 714, 715, 718, 719, 720, 721, or active variants and
fragments thereof, and complements thereof, including, for example,
SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145,
149, 153, 157, 169, 173, 181, 185, 189, 205, 217, 225, 233, 561,
562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574,
575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587,
588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600,
601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613,
614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626,
627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639,
640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652,
653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665,
666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678,
679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691,
692, and active variants and fragments thereof, and complements
thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697,
700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718,
719, 720, 721 and active variants and fragments thereof, and
complements thereof; b) said second segment comprises a loop of
sufficient length to allow the silencing element to be transcribed
as a hairpin RNA; and, c) said third segment comprises at least
about 19 nucleotides having at least 85% complementarity to the
first segment.
8. The expression cassette of claim 3, wherein said polynucleotide
is flanked by a first operably linked convergent promoter at one
terminus of the polynucleotide and a second operably linked
convergent promoter at the opposing terminus of the polynucleotide,
wherein the first and the second convergent promoters are capable
of driving expression of the polynucleotide.
9. A host cell comprising a heterologous expression cassette of
claim 3.
10. A plant cell having stably incorporated into its genome a
heterologous polynucleotide comprising a silencing element, wherein
said silencing element comprises a) a fragment of at least 19
consecutive nucleotides of any one SEQ ID NOS: 1, 4, 5, 8, 9, 12,
13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45,
48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76,
77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105,
108, 109, 112, 113, 116, 117, 120, 121, 124, 125, 128, 129, 132,
133, 136, 137, 140, 141, 144, 145, 148, 149, 152, 153, 156, 157,
160, 161, 164, 165, 168, 169, 172, 173, 176, 177, 180, 181, 184,
185, 188, 189, 192, 193, 196, 197, 200, 201, 204, 205, 208, 209,
212, 213, 216, 217, 220, 221, 224, 225, 228, 229, 232, 233, 236,
237, 240, 241, 244, 245, 248, 249, 252, 253, 256, 257, 260, 261,
264, 265, 268, 269, 272, 273, 276, 277, 280, 281, 284, 285, 288,
289, 292, 293, 296, 297, 300, 301, 304, 305, 308, 309, 312, 313,
316, 317, 320, 321, 324, 325, 328, 329, 332, 333, 336, 337, 340,
341, 344, 345, 348, 349, 352, 353, 356, 357, 360, 361, 364, 365,
368, 369, 372, 373, 376, 377, 380, 381, 384, 385, 388, 389, 392,
393, 396, 397, 400, 401, 404, 405, 408, 409, 412, 413, 416, 417,
420, 421, 424, 425, 428, 429, 432, 433, 436, 437, 440, 441, 444,
445, 448, 449, 452, 453, 456, 457, 460, 461, 464, 465, 468, 469,
472, 473, 476, 477, 480, 481, 484, 485, 488, 489, 492, 493, 496,
497, 500, 501, 504, 505, 508, 509, 512, 513, 516, 517, 520, 521,
524, 525, 528, 529, 532, 533, 536, 537, 540, 541, 544, 545, 548,
549, 552, 553, 556, 557, 560, 561, 562, 563, 564, 565, 566, 567,
568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580,
581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593,
594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606,
607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619,
620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632,
633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645,
646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658,
659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671,
672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684,
685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695, 696, 697,
700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718,
719, 720, 721, or active variants and fragments thereof, and
complements thereof, including, for example, SEQ ID NOS: 1, 9, 37,
45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149, 153, 157, 169,
173, 181, 185, 189, 205, 217, 225, 233, 561, 562, 563, 564, 565,
566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578,
579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591,
592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604,
605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617,
618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630,
631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643,
644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656,
657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669,
670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682,
683, 684, 685, 686, 687, 688, 689, 690, 691, 692, and active
variants and fragments thereof, and complements thereof, and SEQ ID
NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721 and
active variants and fragments thereof, and complements thereof; or,
b) the nucleotide sequence comprising at least 90% sequence
identity to any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17,
20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52,
53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81,
84, 85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112,
113, 116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137,
140, 141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164,
165, 168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189,
192, 193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216,
217, 220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241,
244, 245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268,
269, 272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293,
296, 297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320,
321, 324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345,
348, 349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372,
373, 376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397,
400, 401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424,
425, 428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449,
452, 453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476,
477, 480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501,
504, 505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528,
529, 532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553,
556, 557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570,
571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583,
584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596,
597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609,
610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622,
623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635,
636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648,
649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661,
662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674,
675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687,
688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702,
703, 706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or
active variants and fragments thereof, and complements thereof,
including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77,
101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189,
205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, and active variants and fragments
thereof, and complements thereof, and SEQ ID NOS: 4, 140, 144, 148,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721 and active variants and
fragments thereof, and complements thereof; wherein said silencing
element, when ingested by a Coleoptera plant pest, reduces the
level of a target sequence in said Coleoptera plant pest and
thereby controls the Coleoptera plant pest.
11. The plant cell of claim 10, wherein the Coleoptera plant pest
is a Diabrotica plant pest.
12. The plant cell of claim 10, wherein said silencing element
comprises a) a polynucleotide comprising the sequence set forth in
any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24,
25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55,
56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88,
89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116,
117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140, 141,
144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165, 168,
169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192, 193,
196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217, 220,
221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244, 245,
248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269, 272,
273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296, 297,
300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321, 324,
325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348, 349,
352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373, 376,
377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400, 401,
404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425, 428,
429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452, 453,
456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477, 480,
481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504, 505,
508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529, 532,
533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556, 557,
560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572,
573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585,
586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598,
599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611,
612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624,
625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637,
638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650,
651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663,
664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676,
677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689,
690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706,
707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or active
variants and fragments thereof, and complements thereof, including,
for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113,
137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189, 205, 217,
225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, and active variants and fragments thereof, and
complements thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694,
695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713,
714, 715, 718, 719, 720, 721 and active variants and fragments
thereof, and complements thereof; b) a polynucleotide comprising at
least 130 consecutive nucleotides of the sequence set forth in any
one SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28,
29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57,
60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92,
93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117, 120,
121, 124, 125, 128, 129, 132, 133, 136, 137, 140, 141, 144, 145,
148, 149, 152, 153, 156, 157, 160, 161, 164, 165, 168, 169, 172,
173, 176, 177, 180, 181, 184, 185, 188, 189, 192, 193, 196, 197,
200, 201, 204, 205, 208, 209, 212, 213, 216, 217, 220, 221, 224,
225, 228, 229, 232, 233, 236, 237, 240, 241, 244, 245, 248, 249,
252, 253, 256, 257, 260, 261, 264, 265, 268, 269, 272, 273, 276,
277, 280, 281, 284, 285, 288, 289, 292, 293, 296, 297, 300, 301,
304, 305, 308, 309, 312, 313, 316, 317, 320, 321, 324, 325, 328,
329, 332, 333, 336, 337, 340, 341, 344, 345, 348, 349, 352, 353,
356, 357, 360, 361, 364, 365, 368, 369, 372, 373, 376, 377, 380,
381, 384, 385, 388, 389, 392, 393, 396, 397, 400, 401, 404, 405,
408, 409, 412, 413, 416, 417, 420, 421, 424, 425, 428, 429, 432,
433, 436, 437, 440, 441, 444, 445, 448, 449, 452, 453, 456, 457,
460, 461, 464, 465, 468, 469, 472, 473, 476, 477, 480, 481, 484,
485, 488, 489, 492, 493, 496, 497, 500, 501, 504, 505, 508, 509,
512, 513, 516, 517, 520, 521, 524, 525, 528, 529, 532, 533, 536,
537, 540, 541, 544, 545, 548, 549, 552, 553, 556, 557, 560, 561,
562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574,
575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587,
588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600,
601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613,
614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626,
627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639,
640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652,
653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665,
666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678,
679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691,
692, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708,
709, 712, 713, 714, 715, 718, 719, 720, 721, or active variants and
fragments thereof, and complements thereof, including, for example,
SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145,
149, 153, 157, 169, 173, 181, 185, 189, 205, 217, 225, 233, 561,
562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574,
575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587,
588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600,
601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613,
614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626,
627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639,
640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652,
653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665,
666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678,
679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691,
692, and active variants and fragments thereof, and complements
thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697,
700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718,
719, 720, 721 and active variants and fragments thereof, and
complements thereof.
13. The plant cell of claim 10, wherein said plant cell comprises
the expression cassette of claim 8.
14. The plant cell of claim 10, wherein said silencing element
expresses a double stranded RNA.
15. The plant cell of claim 10, wherein said silencing element
expresses a hairpin RNA.
16. The plant cell of claim 15, wherein said polynucleotide
comprising the silencing element comprises, in the following order,
a first segment, a second segment, and a third segment, wherein a)
said first segment comprises at least about 19 nucleotides having
at least 90% sequence complementarity to a target sequence set
forth in any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20,
21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53,
54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84,
85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113,
116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140,
141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165,
168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192,
193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217,
220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244,
245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269,
272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296,
297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321,
324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348,
349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373,
376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400,
401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425,
428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452,
453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477,
480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504,
505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529,
532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556,
557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or
active variants and fragments thereof, and complements thereof,
including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77,
101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189,
205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, and active variants and fragments
thereof, and complements thereof, and SEQ ID NOS: 4, 140, 144, 148,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721 and active variants and
fragments thereof, and complements thereof; b) said second segment
comprises a loop of sufficient length to allow the silencing
element to be transcribed as a hairpin RNA; and, c) said third
segment comprises at least about 19 nucleotides having at least 85%
complementarity to the first segment.
17. The plant cell of claim 10, wherein said silencing element is
operably linked to a heterologous promoter.
18. The plant cell of claim 10, wherein said plant cell is from a
monocot.
19. The plant cell of claim 18, wherein said monocot is maize,
barley, millet, wheat or rice.
20. The plant cell of claim 10, wherein said plant cell is from a
dicot.
21. The plant cell of claim 20, wherein said plant is soybean,
canola, alfalfa, sunflower, safflower, tobacco, Arabidopsis, or
cotton.
22. A plant or plant part comprising a plant cell of claim 10.
23. A transgenic seed from the plant of claim 22.
24. A method for controlling a Coleoptera plant pest comprising
feeding to a Coleoptera plant pest a composition comprising a
silencing element, wherein said silencing element, when ingested by
said Coleoptera plant pest, reduces the level of a target
Coleoptera plant pest sequence and thereby controls the Coleoptera
plant pest, wherein said target Coleoptera plant pest sequence
comprise a nucleotide sequence comprising at least 90% sequence
identity to any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17,
20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52,
53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81,
84, 85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112,
113, 116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137,
140, 141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164,
165, 168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189,
192, 193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216,
217, 220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241,
244, 245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268,
269, 272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293,
296, 297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320,
321, 324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345,
348, 349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372,
373, 376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397,
400, 401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424,
425, 428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449,
452, 453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476,
477, 480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501,
504, 505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528,
529, 532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553,
556, 557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570,
571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583,
584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596,
597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609,
610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622,
623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635,
636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648,
649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661,
662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674,
675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687,
688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702,
703, 706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or
active variants and fragments thereof, and complements thereof,
including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77,
101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189,
205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, and active variants and fragments
thereof, and complements thereof, and SEQ ID NOS: 4, 140, 144, 148,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721 and active variants and
fragments thereof, and complements thereof.
25. The method of claim 24, wherein said Coleoptera plant pest
comprises a Diabrotica plant pest.
26. The method of claim 24, wherein said silencing element
comprises a) a fragment of at least 19 consecutive nucleotides of
any one SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25,
28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56,
57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89,
92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117,
120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140, 141, 144,
145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165, 168, 169,
172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192, 193, 196,
197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217, 220, 221,
224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244, 245, 248,
249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269, 272, 273,
276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296, 297, 300,
301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321, 324, 325,
328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348, 349, 352,
353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373, 376, 377,
380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400, 401, 404,
405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425, 428, 429,
432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452, 453, 456,
457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477, 480, 481,
484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504, 505, 508,
509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529, 532, 533,
536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556, 557, 560,
561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573,
574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586,
587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599,
600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612,
613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625,
626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638,
639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651,
652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664,
665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677,
678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690,
691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707,
708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or active
variants and fragments thereof, and complements thereof, including,
for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113,
137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189, 205, 217,
225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, and active variants and fragments thereof, and
complements thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694,
695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713,
714, 715, 718, 719, 720, 721 and active variants and fragments
thereof, and complements thereof; or, b) a nucleotide sequence
comprising at least 90% sequence identity to any one of SEQ ID NOS:
1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36,
37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65,
68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97,
100, 101, 104, 105, 108, 109, 112, 113, 116, 117, 120, 121, 124,
125, 128, 129, 132, 133, 136, 137, 140, 141, 144, 145, 148, 149,
152, 153, 156, 157, 160, 161, 164, 165, 168, 169, 172, 173, 176,
177, 180, 181, 184, 185, 188, 189, 192, 193, 196, 197, 200, 201,
204, 205, 208, 209, 212, 213, 216, 217, 220, 221, 224, 225, 228,
229, 232, 233, 236, 237, 240, 241, 244, 245, 248, 249, 252, 253,
256, 257, 260, 261, 264, 265, 268, 269, 272, 273, 276, 277, 280,
281, 284, 285, 288, 289, 292, 293, 296, 297, 300, 301, 304, 305,
308, 309, 312, 313, 316, 317, 320, 321, 324, 325, 328, 329, 332,
333, 336, 337, 340, 341, 344, 345, 348, 349, 352, 353, 356, 357,
360, 361, 364, 365, 368, 369, 372, 373, 376, 377, 380, 381, 384,
385, 388, 389, 392, 393, 396, 397, 400, 401, 404, 405, 408, 409,
412, 413, 416, 417, 420, 421, 424, 425, 428, 429, 432, 433, 436,
437, 440, 441, 444, 445, 448, 449, 452, 453, 456, 457, 460, 461,
464, 465, 468, 469, 472, 473, 476, 477, 480, 481, 484, 485, 488,
489, 492, 493, 496, 497, 500, 501, 504, 505, 508, 509, 512, 513,
516, 517, 520, 521, 524, 525, 528, 529, 532, 533, 536, 537, 540,
541, 544, 545, 548, 549, 552, 553, 556, 557, 560, 561, 562, 563,
564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576,
577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589,
590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602,
603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615,
616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628,
629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641,
642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654,
655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667,
668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680,
681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693,
694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712,
713, 714, 715, 718, 719, 720, 721, or active variants and fragments
thereof, and complements thereof, including, for example, SEQ ID
NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149,
153, 157, 169, 173, 181, 185, 189, 205, 217, 225, 233, 561, 562,
563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575,
576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588,
589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601,
602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614,
615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627,
628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640,
641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653,
654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666,
667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679,
680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692,
and active variants and fragments thereof, and complements thereof,
and SEQ ID NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700,
701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718, 719,
720, 721 and active variants and fragments thereof, and complements
thereof.
27. The method of claim 25, wherein said Diabrotica plant pest
comprises D. virgifera virgifera, D. virgifera zeae, D. speciosa,
D. barberi, D. virgifera zeae, D. speciosa, or D. undecimpunctata
howardi.
28. The method of claim 24, wherein said composition comprises a
plant or plant part having stably incorporated into its genome a
polynucleotide comprising said silencing element.
29. The method of claim 26, wherein said silencing element
comprises a) a polynucleotide comprising the sense or antisense
sequence of the sequence set forth in any one SEQ ID NOS: 1, 4, 5,
8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40,
41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69,
72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100, 101,
104, 105, 108, 109, 112, 113, 116, 117, 120, 121, 124, 125, 128,
129, 132, 133, 136, 137, 140, 141, 144, 145, 148, 149, 152, 153,
156, 157, 160, 161, 164, 165, 168, 169, 172, 173, 176, 177, 180,
181, 184, 185, 188, 189, 192, 193, 196, 197, 200, 201, 204, 205,
208, 209, 212, 213, 216, 217, 220, 221, 224, 225, 228, 229, 232,
233, 236, 237, 240, 241, 244, 245, 248, 249, 252, 253, 256, 257,
260, 261, 264, 265, 268, 269, 272, 273, 276, 277, 280, 281, 284,
285, 288, 289, 292, 293, 296, 297, 300, 301, 304, 305, 308, 309,
312, 313, 316, 317, 320, 321, 324, 325, 328, 329, 332, 333, 336,
337, 340, 341, 344, 345, 348, 349, 352, 353, 356, 357, 360, 361,
364, 365, 368, 369, 372, 373, 376, 377, 380, 381, 384, 385, 388,
389, 392, 393, 396, 397, 400, 401, 404, 405, 408, 409, 412, 413,
416, 417, 420, 421, 424, 425, 428, 429, 432, 433, 436, 437, 440,
441, 444, 445, 448, 449, 452, 453, 456, 457, 460, 461, 464, 465,
468, 469, 472, 473, 476, 477, 480, 481, 484, 485, 488, 489, 492,
493, 496, 497, 500, 501, 504, 505, 508, 509, 512, 513, 516, 517,
520, 521, 524, 525, 528, 529, 532, 533, 536, 537, 540, 541, 544,
545, 548, 549, 552, 553, 556, 557, 560, 561, 562, 563, 564, 565,
566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578,
579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591,
592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604,
605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617,
618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630,
631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643,
644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656,
657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669,
670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682,
683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695,
696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714,
715, 718, 719, 720, 721, or active variants and fragments thereof,
and complements thereof, including, for example, SEQ ID NOS: 1, 9,
37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149, 153, 157,
169, 173, 181, 185, 189, 205, 217, 225, 233, 561, 562, 563, 564,
565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577,
578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590,
591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603,
604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616,
617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629,
630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642,
643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655,
656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668,
669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681,
682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, and active
variants and fragments thereof, and complements thereof, and SEQ ID
NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721 and
active variants and fragments thereof, and complements thereof; b)
a polynucleotide comprising the sense or antisense sequence of a
sequence having at least 95% sequence identity to the sequence set
forth in any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20,
21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53,
54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84,
85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113,
116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140,
141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165,
168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192,
193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217,
220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244,
245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269,
272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296,
297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321,
324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348,
349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373,
376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400,
401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425,
428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452,
453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477,
480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504,
505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529,
532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556,
557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or
active variants and fragments thereof, and complements thereof,
including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77,
101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189,
205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, and active variants and fragments
thereof, and complements thereof, and SEQ ID NOS: 4, 140, 144, 148,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721 and active variants and
fragments thereof, and complements thereof; c) a polynucleotide
comprising the sense or antisense sequence of a sequence having at
least 130 contiguous nucleotides of any one of SEQ ID NOS: 1, 4, 5,
8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40,
41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69,
72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100, 101,
104, 105, 108, 109, 112, 113, 116, 117, 120, 121, 124, 125, 128,
129, 132, 133, 136, 137, 140, 141, 144, 145, 148, 149, 152, 153,
156, 157, 160, 161, 164, 165, 168, 169, 172, 173, 176, 177, 180,
181, 184, 185, 188, 189, 192, 193, 196, 197, 200, 201, 204, 205,
208, 209, 212, 213, 216, 217, 220, 221, 224, 225, 228, 229, 232,
233, 236, 237, 240, 241, 244, 245, 248, 249, 252, 253, 256, 257,
260, 261, 264, 265, 268, 269, 272, 273, 276, 277, 280, 281, 284,
285, 288, 289, 292, 293, 296, 297, 300, 301, 304, 305, 308, 309,
312, 313, 316, 317, 320, 321, 324, 325, 328, 329, 332, 333, 336,
337, 340, 341, 344, 345, 348, 349, 352, 353, 356, 357, 360, 361,
364, 365, 368, 369, 372, 373, 376, 377, 380, 381, 384, 385, 388,
389, 392, 393, 396, 397, 400, 401, 404, 405, 408, 409, 412, 413,
416, 417, 420, 421, 424, 425, 428, 429, 432, 433, 436, 437, 440,
441, 444, 445, 448, 449, 452, 453, 456, 457, 460, 461, 464, 465,
468, 469, 472, 473, 476, 477, 480, 481, 484, 485, 488, 489, 492,
493, 496, 497, 500, 501, 504, 505, 508, 509, 512, 513, 516, 517,
520, 521, 524, 525, 528, 529, 532, 533, 536, 537, 540, 541, 544,
545, 548, 549, 552, 553, 556, 557, 560, 561, 562, 563, 564, 565,
566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578,
579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591,
592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604,
605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617,
618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630,
631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643,
644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656,
657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669,
670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682,
683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695,
696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714,
715, 718, 719, 720, 721, or active variants and fragments thereof,
and complements thereof, including, for example, SEQ ID NOS: 1, 9,
37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149, 153, 157,
169, 173, 181, 185, 189, 205, 217, 225, 233, 561, 562, 563, 564,
565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577,
578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590,
591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603,
604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616,
617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629,
630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642,
643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655,
656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668,
669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681,
682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, and active
variants and fragments thereof, and complements thereof, and SEQ ID
NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721 and
active variants and fragments thereof, and complements thereof.
30. The method of claim 24, wherein said silencing element
expresses a double stranded RNA.
31. The method of claim 24, wherein said silencing element
comprises a hairpin RNA.
32. The method of claim 31, wherein said polynucleotide comprising
the silencing element comprises, in the following order, a first
segment, a second segment, and a third segment, wherein a) said
first segment comprises at least about 19 nucleotides having at
least 90% sequence complementarity to the target polynucleotide; b)
said second segment comprises a loop of sufficient length to allow
the silencing element to be transcribed as a hairpin RNA; and, c)
said third segment comprises at least about 19 nucleotides having
at least 85% complementarity to the first segment.
33. The method of claim 28, wherein said silencing element is
operably linked to a heterologous promoter.
34. The method of claim 28, wherein said silencing element is
flanked by a first operably linked convergent promoter at one
terminus of the silencing element and a second operably linked
convergent promoter at the opposing terminus of the polynucleotide,
wherein the first and the second convergent promoters are capable
of driving expression of the silencing element.
35. The method of claim 28, wherein said plant is a monocot.
36. The method of claim 35, wherein said monocot is maize, barley,
millet, wheat or rice.
37. The method of claim 28, wherein said plant is a dicot.
38. The method of claim 37, wherein said plant is soybean, canola,
alfalfa, sunflower, safflower, tobacco, Arabidopsis, or cotton.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of U.S. Utility application
Ser. No. 13/831,230, filed Mar. 14, 2013, which is incorporated
herein by reference in its entirety.
FIELD OF THE INVENTION
[0002] The present invention relates generally to methods of
molecular biology and gene silencing to control pests.
REFERENCE TO A SEQUENCE LISTING SUBMITTED AS A TEXT FILE VIA
EFS-WEB
[0003] The Sequence Listing submitted concurrently as a text file
named "36446_0007U2_12_17_13_Corrected_Sequence_Listing," created
on Dec. 17, 2013, and having a size of 691,157 bytes is hereby
incorporated by reference pursuant to 37 C.F.R.
.sctn.1.52(e)(5).
BACKGROUND OF THE INVENTION
[0004] Insect pests are a serious problem in agriculture. They
destroy millions of acres of staple crops such as corn, soybeans,
peas, and cotton. Yearly, these pests cause over $100 billion
dollars in crop damage in the U.S. alone. In an ongoing seasonal
battle, farmers must apply billions of gallons of synthetic
pesticides to combat these pests. Other methods employed in the
past delivered insecticidal activity by microorganisms or genes
derived from microorganisms expressed in transgenic plants. For
example, certain species of microorganisms of the genus Bacillus
are known to possess pesticidal activity against a broad range of
insect pests including Lepidoptera, Diptera, Coleoptera, Hemiptera,
and others. In fact, microbial pesticides, particularly those
obtained from Bacillus strains, have played an important role in
agriculture as alternatives to chemical pest control. Agricultural
scientists have developed crop plants with enhanced insect
resistance by genetically engineering crop plants to produce
insecticidal proteins from Bacillus. For example, corn and cotton
plants genetically engineered to produce Cry toxins (see, e.g.,
Aronson (2002) Cell Mol. Life Sci. 59(3):417-425; Schnepf et al.
(1998) Microbiol. Mol. Biol. Rev. 62(3):775-806) are now widely
used in American agriculture and have provided the farmer with an
alternative to traditional insect-control methods. However, these
Bt insecticidal proteins only protect plants from a relatively
narrow range of pests. Moreover, these modes of insecticidal
activity provided varying levels of specificity and, in some cases,
caused significant environmental consequences. Thus, there is an
immediate need for alternative methods to control pests.
BRIEF SUMMARY OF THE INVENTION
[0005] Methods and compositions are provided which employ a
silencing element that, when ingested by a pest, such as
Coleopteran plant pest including a Diabrotica plant pest, is
capable of decreasing the expression of a target sequence in the
pest. In specific embodiments, the decrease in expression of the
target sequence controls the pest and thereby the methods and
compositions are capable of limiting damage to a plant. The present
invention provides various target polynucleotides as set forth in
SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29,
32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60,
61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93,
96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117, 120, 121,
124, 125, 128, 129, 132, 133, 136, 137, 140, 141, 144, 145, 148,
149, 152, 153, 156, 157, 160, 161, 164, 165, 168, 169, 172, 173,
176, 177, 180, 181, 184, 185, 188, 189, 192, 193, 196, 197, 200,
201, 204, 205, 208, 209, 212, 213, 216, 217, 220, 221, 224, 225,
228, 229, 232, 233, 236, 237, 240, 241, 244, 245, 248, 249, 252,
253, 256, 257, 260, 261, 264, 265, 268, 269, 272, 273, 276, 277,
280, 281, 284, 285, 288, 289, 292, 293, 296, 297, 300, 301, 304,
305, 308, 309, 312, 313, 316, 317, 320, 321, 324, 325, 328, 329,
332, 333, 336, 337, 340, 341, 344, 345, 348, 349, 352, 353, 356,
357, 360, 361, 364, 365, 368, 369, 372, 373, 376, 377, 380, 381,
384, 385, 388, 389, 392, 393, 396, 397, 400, 401, 404, 405, 408,
409, 412, 413, 416, 417, 420, 421, 424, 425, 428, 429, 432, 433,
436, 437, 440, 441, 444, 445, 448, 449, 452, 453, 456, 457, 460,
461, 464, 465, 468, 469, 472, 473, 476, 477, 480, 481, 484, 485,
488, 489, 492, 493, 496, 497, 500, 501, 504, 505, 508, 509, 512,
513, 516, 517, 520, 521, 524, 525, 528, 529, 532, 533, 536, 537,
540, 541, 544, 545, 548, 549, 552, 553, 556, 557, 560, 561, 562,
563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575,
576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588,
589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601,
602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614,
615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627,
628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640,
641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653,
654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666,
667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679,
680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721, or active variants or
fragments thereof, or complements thereof, wherein a decrease in
expression of one or more of the sequences in the target pest
controls the pest (i.e., has insecticidal activity). Further
provided are silencing elements, which when ingested by the pest,
decrease the level of expression of one or more of the target
polynucleotides. Plants, plant parts, plant cells, bacteria and
other host cells comprising the silencing elements or an active
variant or fragment thereof are also provided. Also provided are
formulations of sprayable silencing agents for topical applications
to pest insects or substrates where pest insects may be found.
[0006] In another embodiment, a method for controlling a pest, such
as a Coleopteran plant pest or a Diabrotica plant pest, is
provided. The method comprises feeding to a pest a composition
comprising a silencing element, wherein the silencing element, when
ingested by the pest, reduces the level of a target sequence in the
pest and thereby controls the pest. Further provided are methods to
protect a plant from a pest. Such methods comprise introducing into
the plant or plant part a silencing element of the invention. When
the plant expressing the silencing element is ingested by the pest,
the level of the target sequence is decreased and the pest is
controlled.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] FIGS. 1A-1O are tables, Tables 1A and 1B, which identifies
RNAi active targets in diet assay using dsRNA produced by in vitro
transcription (IVT).
[0008] FIGS. 2A-2J are a table, Table 2, which shows design and
identification of RNAi active fragments
[0009] FIGS. 3A-3C are a table, Table 3, which lists RNAi active
targets from target pests, expanded pests and no target insects.
Homologous sequences of selected RNAi actives were identified from
transcriptome analyses of Western corn rootworm (WCRW, Diabrotica
virgifera), Northern corn rootworm (NCRW, Diabrotica barberi),
Southern corn rootworm (SCRW, Diabrotica undecimpunctata), Mexican
Bean Beetle (MBB, Epilachna varivestis), Colorado potato beetle
(CPB, Leptinotarsa decemlineata), insidious flower bug (Orius,
Orius insidiosus) and Spotted Lady Beetle (CMAC, Coleomegilla
maculate).
[0010] FIG. 4 is a graphic showing a sequence alignment of the
amino acid sequences of WCRW Ryanr (SEQ ID NO: 724) and Drosophila
Ssk (SEQ ID NO: 725).
[0011] FIG. 5 is a schematic of PAT3 fragments used in the gene and
construct optimization experiment.
DETAILED DESCRIPTION OF THE INVENTION
[0012] The present inventions now will be described more fully
hereinafter with reference to the accompanying drawings, in which
some, but not all embodiments of the inventions are shown. Indeed,
these inventions may be embodied in many different forms and should
not be construed as limited to the embodiments set forth herein;
rather, these embodiments are provided so that this disclosure will
satisfy applicable legal requirements. Like numbers refer to like
elements throughout.
[0013] Many modifications and other embodiments of the inventions
set forth herein will come to mind to one skilled in the art to
which these inventions pertain having the benefit of the teachings
presented in the foregoing descriptions and the associated
drawings. Therefore, it is to be understood that the inventions are
not to be limited to the specific embodiments disclosed and that
modifications and other embodiments are intended to be included
within the scope of the appended claims. Although specific terms
are employed herein, they are used in a generic and descriptive
sense only and not for purposes of limitation.
1. Overview
[0014] Frequently, RNAi discovery methods rely on evaluation of
known classes of sensitive genes (transcription factors,
housekeeping genes etc.). In contrast, the target polynucleotides
set forth herein were identified based solely on high throughput
screens of all singletons and representatives of all gene clusters
from a cDNA library of neonate and/or 3.sup.rd instar midgut
western corn rootworms. This screen allowed for the discovery of
many novel sequences, many of which have extremely low or no
homology to known sequences. This method provided the advantage of
having no built in bias to genes that are frequently highly
conserved across taxa. As a result, many novel targets for RNAi as
well as known genes not previously shown to be sensitive to RNAi
have been identified.
[0015] As such, methods and compositions are provided which employ
one or more silencing elements that, when ingested by a pest, such
as a Coleopteran plant pest or a Diabrotica plant pest, is capable
of decreasing the expression of a target sequence in the pest. In
specific embodiments, the decrease in expression of the target
sequence controls the pest and thereby the methods and compositions
are capable of limiting damage to a plant or plant part. The
present invention provides target polynucleotides as set forth in
SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29,
32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60,
61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93,
96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117, 120, 121,
124, 125, 128, 129, 132, 133, 136, 137, 140, 141, 144, 145, 148,
149, 152, 153, 156, 157, 160, 161, 164, 165, 168, 169, 172, 173,
176, 177, 180, 181, 184, 185, 188, 189, 192, 193, 196, 197, 200,
201, 204, 205, 208, 209, 212, 213, 216, 217, 220, 221, 224, 225,
228, 229, 232, 233, 236, 237, 240, 241, 244, 245, 248, 249, 252,
253, 256, 257, 260, 261, 264, 265, 268, 269, 272, 273, 276, 277,
280, 281, 284, 285, 288, 289, 292, 293, 296, 297, 300, 301, 304,
305, 308, 309, 312, 313, 316, 317, 320, 321, 324, 325, 328, 329,
332, 333, 336, 337, 340, 341, 344, 345, 348, 349, 352, 353, 356,
357, 360, 361, 364, 365, 368, 369, 372, 373, 376, 377, 380, 381,
384, 385, 388, 389, 392, 393, 396, 397, 400, 401, 404, 405, 408,
409, 412, 413, 416, 417, 420, 421, 424, 425, 428, 429, 432, 433,
436, 437, 440, 441, 444, 445, 448, 449, 452, 453, 456, 457, 460,
461, 464, 465, 468, 469, 472, 473, 476, 477, 480, 481, 484, 485,
488, 489, 492, 493, 496, 497, 500, 501, 504, 505, 508, 509, 512,
513, 516, 517, 520, 521, 524, 525, 528, 529, 532, 533, 536, 537,
540, 541, 544, 545, 548, 549, 552, 553, 556, 557, 560, 561, 562,
563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575,
576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588,
589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601,
602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614,
615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627,
628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640,
641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653,
654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666,
667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679,
680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721, or active variants and
fragments thereof, and complements thereof, including, for example,
SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145,
149, 153, 157, 169, 173, 181, 185, 189, 205, 217, 225, 233, 561,
562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574,
575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587,
588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600,
601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613,
614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626,
627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639,
640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652,
653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665,
666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678,
679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691,
692, and active variants and fragments thereof, and complements
thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697,
700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718,
719, 720, 721 and active variants and fragments thereof, and
complements thereof. Silencing elements comprising sequences,
complementary sequences, active fragments or variants of these
target polynucleotides are provided which, when ingested by or when
contacting the pest, decrease the expression of one or more of the
target sequences and thereby controls the pest (i.e., has
insecticidal activity).
[0016] As used herein, by "controlling a pest" or "controls a pest"
is intended any affect on a pest that results in limiting the
damage that the pest causes. Controlling a pest includes, but is
not limited to, killing the pest, inhibiting development of the
pest, altering fertility or growth of the pest in such a manner
that the pest provides less damage to the plant, decreasing the
number of offspring produced, producing less fit pests, producing
pests more susceptible to predator attack, or deterring the pests
from eating the plant.
[0017] Reducing the level of expression of the target
polynucleotide or the polypeptide encoded thereby, in the pest
results in the suppression, control, and/or killing the invading
pest. Reducing the level of expression of the target sequence of
the pest will reduce the pest damage by at least about 2% to at
least about 6%, at least about 5% to about 50%, at least about 10%
to about 60%, at least about 30% to about 70%, at least about 40%
to about 80%, or at least about 50% to about 90% or greater. Hence,
the methods of the invention can be utilized to control pests,
particularly, Coleopteran plant pests or a Diabrotica plant
pest.
[0018] Assays measuring the control of a pest are commonly known in
the art, as are methods to record nodal injury score. See, for
example, Oleson et al. (2005) J. Econ. Entomol. 98:1-8. See, for
example, the examples below.
[0019] The invention is drawn to compositions and methods for
protecting plants from a plant pest, such as Coleopteran plant
pests or Diabrotica plant pests or inducing resistance in a plant
to a plant pest, such as Coleopteran plant pests or Diabrotica
plant pests. As used herein "Coleopteran plant pest" is used to
refer to any member of the Coleoptera order. Other plant pests that
may be targeted by the methods and compositions of the present
invention include, but are not limited to Mexican Bean Beetle
(Epilachna varivestis), and Colorado potato beetle (Leptinotarsa
decemlineata),
[0020] As used herein, the term "Diabrotica plant pest" is used to
refer to any member of the Diabrotica genus. Accordingly, the
compositions and methods are also useful in protecting plants
against any Diabrotica plant pest including, for example,
Diabrotica adelpha; Diabrotica amecameca; Diabrotica balteata;
Diabrotica barberi; Diabrotica biannularis; Diabrotica cristata;
Diabrotica decempunctata; Diabrotica dissimilis; Diabrotica
lemniscata; Diabrotica limitata (including, for example, Diabrotica
limitata quindecimpuncata); Diabrotica longicornis; Diabrotica
nummularis; Diabrotica porracea; Diabrotica scutellata; Diabrotica
sexmaculata; Diabrotica speciosa (including, for example,
Diabrotica speciosa speciosa); Diabrotica tibialis; Diabrotica
undecimpunctata (including, for example, Southern corn rootworm
(Diabrotica undecimpunctata), Diabrotica undecimpunctata
duodecimnotata; Diabrotica undecimpunctata howardi (spotted
cucumber beetle); Diabrotica undecimpunctata undecimpunctata
(western spotted cucumber beetle)); Diabrotica virgifera
(including, for example, Diabrotica virgifera virgifera (western
corn rootworm) and Diabrotica virgifera zeae (Mexican corn
rootworm)); Diabrotica viridula; Diabrotica wartensis; Diabrotica
sp. JJG335; Diabrotica sp. JJG336; Diabrotica sp. JJG341;
Diabrotica sp. JJG356; Diabrotica sp. JJG362; and, Diabrotica sp.
JJG365.
[0021] In specific embodiments, the Diabrotica plant pest comprises
D. virgifera virgifera, D. barberi, D. virgifera zeae, D. speciosa,
D. speciosa or D. undecimpunctata howardi.
II. Target Sequences
[0022] As used herein, a "target sequence" or "target
polynucleotide" comprises any sequence in the pest that one desires
to reduce the level of expression thereof. In specific embodiments,
decreasing the level of the target sequence in the pest controls
the pest. For instance, the target sequence may be essential for
growth and development. While the target sequence can be expressed
in any tissue of the pest, in specific embodiments, the sequences
targeted for suppression in the pest are expressed in cells of the
gut tissue of the pest, cells in the midgut of the pest, and cells
lining the gut lumen or the midgut. Such target sequences can be
involved in, for example, gut cell metabolism, growth or
differentiation. Non-limiting examples of target sequences of the
invention include a polynucleotide set forth in SEQ ID NOS: 1, 4,
5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37,
40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68,
69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100,
101, 104, 105, 108, 109, 112, 113, 116, 117, 120, 121, 124, 125,
128, 129, 132, 133, 136, 137, 140, 141, 144, 145, 148, 149, 152,
153, 156, 157, 160, 161, 164, 165, 168, 169, 172, 173, 176, 177,
180, 181, 184, 185, 188, 189, 192, 193, 196, 197, 200, 201, 204,
205, 208, 209, 212, 213, 216, 217, 220, 221, 224, 225, 228, 229,
232, 233, 236, 237, 240, 241, 244, 245, 248, 249, 252, 253, 256,
257, 260, 261, 264, 265, 268, 269, 272, 273, 276, 277, 280, 281,
284, 285, 288, 289, 292, 293, 296, 297, 300, 301, 304, 305, 308,
309, 312, 313, 316, 317, 320, 321, 324, 325, 328, 329, 332, 333,
336, 337, 340, 341, 344, 345, 348, 349, 352, 353, 356, 357, 360,
361, 364, 365, 368, 369, 372, 373, 376, 377, 380, 381, 384, 385,
388, 389, 392, 393, 396, 397, 400, 401, 404, 405, 408, 409, 412,
413, 416, 417, 420, 421, 424, 425, 428, 429, 432, 433, 436, 437,
440, 441, 444, 445, 448, 449, 452, 453, 456, 457, 460, 461, 464,
465, 468, 469, 472, 473, 476, 477, 480, 481, 484, 485, 488, 489,
492, 493, 496, 497, 500, 501, 504, 505, 508, 509, 512, 513, 516,
517, 520, 521, 524, 525, 528, 529, 532, 533, 536, 537, 540, 541,
544, 545, 548, 549, 552, 553, 556, 557, 560, 561, 562, 563, 564,
565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577,
578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590,
591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603,
604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616,
617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629,
630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642,
643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655,
656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668,
669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681,
682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694,
695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713,
714, 715, 718, 719, 720, 721, or active variants and fragments
thereof, and complements thereof, including, for example, SEQ ID
NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149,
153, 157, 169, 173, 181, 185, 189, 205, 217, 225, 233, 561, 562,
563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575,
576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588,
589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601,
602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614,
615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627,
628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640,
641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653,
654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666,
667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679,
680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692,
and active variants and fragments thereof, and complements thereof,
and SEQ ID NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700,
701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718, 719,
720, 721 and active variants and fragments thereof, and complements
thereof. As exemplified elsewhere herein, decreasing the level of
expression of one or more of these target sequences in a
Coleopteran plant pest or a Diabrotica plant pest controls the
pest.
III. Silencing Elements
[0023] By "silencing element" is intended a polynucleotide which
when contacted by or ingested by a pest, is capable of reducing or
eliminating the level or expression of a target polynucleotide or
the polypeptide encoded thereby. The silencing element employed can
reduce or eliminate the expression level of the target sequence by
influencing the level of the target RNA transcript or,
alternatively, by influencing translation and thereby affecting the
level of the encoded polypeptide. Methods to assay for functional
silencing elements that are capable of reducing or eliminating the
level of a sequence of interest are disclosed elsewhere herein. A
single polynucleotide employed in the methods of the invention can
comprise one or more silencing elements to the same or different
target polynucleotides. The silencing element can be produced in
vivo (i.e., in a host cell such as a plant or microorganism) or in
vitro.
[0024] In specific embodiments, the target sequence is not
endogenous to the plant. In other embodiments, while the silencing
element controls pests, preferably the silencing element has no
effect on the normal plant or plant part.
[0025] As discussed in further detail below, silencing elements can
include, but are not limited to, a sense suppression element, an
antisense suppression element, a double stranded RNA, a siRNA, a
amiRNA, a miRNA, or a hairpin suppression element. Silencing
elements of the present invention may comprise a chimera where two
or more sequences of the present invention or active fragments or
variants, or complements thereof, are found in the same RNA
molecule. Further, a sequence of the present invention or active
fragment or variant, or complement thereof, may be present as more
than one copy in a DNA construct, silencing element, DNA molecule
or RNA molecule. In a hairpin or dsRNA molecule, the location of a
sense or antisense sequence in the molecule, for example, in which
sequence is transcribed first or is located on a particular
terminus of the RNA molecule, is not limiting to the invention, and
the invention is not to be limited by disclosures herein of a
particular location for such a sequence. Non-limiting examples of
silencing elements that can be employed to decrease expression of
these target Coleopteran plant pest sequences or Diabrotica plant
pest sequences comprise fragments and variants of the sense or
antisense sequence or consists of the sense or antisense sequence
of the sequence set forth in SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16,
17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49,
52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80,
81, 84, 85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109,
112, 113, 116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136,
137, 140, 141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161,
164, 165, 168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188,
189, 192, 193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213,
216, 217, 220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240,
241, 244, 245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265,
268, 269, 272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292,
293, 296, 297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317,
320, 321, 324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344,
345, 348, 349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369,
372, 373, 376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396,
397, 400, 401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421,
424, 425, 428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448,
449, 452, 453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473,
476, 477, 480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500,
501, 504, 505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525,
528, 529, 532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552,
553, 556, 557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701,
702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720,
721, or active variants and fragments thereof, and complements
thereof, including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61,
65, 77, 101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185,
189, 205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568,
569, 570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581,
582, 583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594,
595, 596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607,
608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620,
621, 622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633,
634, 635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646,
647, 648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659,
660, 661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672,
673, 674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685,
686, 687, 688, 689, 690, 691, 692, and active variants and
fragments thereof, and complements thereof, and SEQ ID NOS: 4, 140,
144, 148, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707,
708, 709, 712, 713, 714, 715, 718, 719, 720, 721 and active
variants and fragments thereof, and complements thereof. The
silencing element can further comprise additional sequences that
advantageously effect transcription and/or the stability of a
resulting transcript. For example, the silencing elements can
comprise at least one thymine residue at the 3' end. This can aid
in stabilization. Thus, the silencing elements can have at least 1,
2, 3, 4, 5, 6, 7, 8, 9, 10 or more thymine residues at the 3' end.
As discussed in further detail below, enhancer suppressor elements
can also be employed in conjunction with the silencing elements
disclosed herein.
[0026] By "reduces" or "reducing" the expression level of a
polynucleotide or a polypeptide encoded thereby is intended to
mean, the polynucleotide or polypeptide level of the target
sequence is statistically lower than the polynucleotide level or
polypeptide level of the same target sequence in an appropriate
control pest which is not exposed to (i.e., has not ingested or
come into contact with) the silencing element. In particular
embodiments of the invention, reducing the polynucleotide level
and/or the polypeptide level of the target sequence in a pest
according to the invention results in less than 95%, less than 90%,
less than 80%, less than 70%, less than 60%, less than 50%, less
than 40%, less than 30%, less than 20%, less than 10%, or less than
5% of the polynucleotide level, or the level of the polypeptide
encoded thereby, of the same target sequence in an appropriate
control pest. Methods to assay for the level of the RNA transcript,
the level of the encoded polypeptide, or the activity of the
polynucleotide or polypeptide are discussed elsewhere herein.
[0027] i. Sense Suppression Elements
[0028] As used herein, a "sense suppression element" comprises a
polynucleotide designed to express an RNA molecule corresponding to
at least a part of a target messenger RNA in the "sense"
orientation. Expression of the RNA molecule comprising the sense
suppression element reduces or eliminates the level of the target
polynucleotide or the polypeptide encoded thereby. The
polynucleotide comprising the sense suppression element may
correspond to all or part of the sequence of the target
polynucleotide, all or part of the 5' and/or 3' untranslated region
of the target polynucleotide, all or part of the coding sequence of
the target polynucleotide, or all or part of both the coding
sequence and the untranslated regions of the target
polynucleotide.
[0029] Typically, a sense suppression element has substantial
sequence identity to the target polynucleotide, typically greater
than about 65% sequence identity, greater than about 85% sequence
identity, about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99%
sequence identity. See, U.S. Pat. Nos. 5,283,184 and 5,034,323;
herein incorporated by reference. The sense suppression element can
be any length so long as it allows for the suppression of the
targeted sequence. The sense suppression element can be, for
example, 15, 16, 17, 18, 19, 20, 22, 25, 30, 50, 100, 150, 200,
250, 300, 350, 400, 450, 500, 600, 700, 900, 1000, 1100, 1200, 1300
nucleotides or longer of the target polynucleotides set forth in
any of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25,
28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56,
57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89,
92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116, 117,
120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140, 141, 144,
145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165, 168, 169,
172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192, 193, 196,
197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217, 220, 221,
224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244, 245, 248,
249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269, 272, 273,
276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296, 297, 300,
301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321, 324, 325,
328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348, 349, 352,
353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373, 376, 377,
380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400, 401, 404,
405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425, 428, 429,
432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452, 453, 456,
457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477, 480, 481,
484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504, 505, 508,
509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529, 532, 533,
536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556, 557, 560,
561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573,
574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586,
587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599,
600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612,
613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625,
626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638,
639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651,
652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664,
665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677,
678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690,
691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707,
708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or active
variants and fragments thereof, and complements thereof, including,
for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113,
137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189, 205, 217,
225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, and active variants and fragments thereof, and
complements thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694,
695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713,
714, 715, 718, 719, 720, 721 and active variants and fragments
thereof, and complements thereof. In other embodiments, the sense
suppression element can be, for example, about 15-25, 19-35, 19-50,
25-100, 100-150, 150-200, 200-250, 250-300, 300-350, 350-400,
450-500, 500-550, 550-600, 600-650, 650-700, 700-750, 750-800,
800-850, 850-900, 900-950, 950-1000, 1000-1050, 1050-1100,
1100-1200, 1200-1300, 1300-1400, 1400-1500, 1500-1600, 1600-1700,
1700-1800 nucleotides or longer of the target polynucleotides set
forth in any of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21,
24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54,
55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85,
88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113,
116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140,
141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165,
168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192,
193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217,
220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244,
245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269,
272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296,
297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321,
324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348,
349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373,
376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400,
401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425,
428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452,
453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477,
480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504,
505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529,
532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556,
557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or
active variants and fragments thereof, and complements thereof,
including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77,
101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189,
205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, and active variants and fragments
thereof, and complements thereof, and SEQ ID NOS: 4, 140, 144, 148,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721 and active variants and
fragments thereof, and complements thereof.
[0030] ii. Antisense Suppression Elements
[0031] As used herein, an "antisense suppression element" comprises
a polynucleotide which is designed to express an RNA molecule
complementary to all or part of a target messenger RNA. Expression
of the antisense RNA suppression element reduces or eliminates the
level of the target polynucleotide. The polynucleotide for use in
antisense suppression may correspond to all or part of the
complement of the sequence encoding the target polynucleotide, all
or part of the complement of the 5' and/or 3' untranslated region
of the target polynucleotide, all or part of the complement of the
coding sequence of the target polynucleotide, or all or part of the
complement of both the coding sequence and the untranslated regions
of the target polynucleotide. In addition, the antisense
suppression element may be fully complementary (i.e., 100%
identical to the complement of the target sequence) or partially
complementary (i.e., less than 100% identical to the complement of
the target sequence) to the target polynucleotide. In specific
embodiments, the antisense suppression element comprises at least
85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99% sequence
complementarity to the target polynucleotide. Antisense suppression
may be used to inhibit the expression of multiple proteins in the
same plant. See, for example, U.S. Pat. No. 5,942,657. Furthermore,
the antisense suppression element can be complementary to a portion
of the target polynucleotide. Generally, sequences of at least 15,
16, 17, 18, 19, 20, 22, 25, 50, 100, 200, 300, 400, 450 nucleotides
or greater of the sequence set forth in any of SEQ ID NOS: 1, 4, 5,
8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40,
41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69,
72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100, 101,
104, 105, 108, 109, 112, 113, 116, 117, 120, 121, 124, 125, 128,
129, 132, 133, 136, 137, 140, 141, 144, 145, 148, 149, 152, 153,
156, 157, 160, 161, 164, 165, 168, 169, 172, 173, 176, 177, 180,
181, 184, 185, 188, 189, 192, 193, 196, 197, 200, 201, 204, 205,
208, 209, 212, 213, 216, 217, 220, 221, 224, 225, 228, 229, 232,
233, 236, 237, 240, 241, 244, 245, 248, 249, 252, 253, 256, 257,
260, 261, 264, 265, 268, 269, 272, 273, 276, 277, 280, 281, 284,
285, 288, 289, 292, 293, 296, 297, 300, 301, 304, 305, 308, 309,
312, 313, 316, 317, 320, 321, 324, 325, 328, 329, 332, 333, 336,
337, 340, 341, 344, 345, 348, 349, 352, 353, 356, 357, 360, 361,
364, 365, 368, 369, 372, 373, 376, 377, 380, 381, 384, 385, 388,
389, 392, 393, 396, 397, 400, 401, 404, 405, 408, 409, 412, 413,
416, 417, 420, 421, 424, 425, 428, 429, 432, 433, 436, 437, 440,
441, 444, 445, 448, 449, 452, 453, 456, 457, 460, 461, 464, 465,
468, 469, 472, 473, 476, 477, 480, 481, 484, 485, 488, 489, 492,
493, 496, 497, 500, 501, 504, 505, 508, 509, 512, 513, 516, 517,
520, 521, 524, 525, 528, 529, 532, 533, 536, 537, 540, 541, 544,
545, 548, 549, 552, 553, 556, 557, 560, 561, 562, 563, 564, 565,
566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578,
579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591,
592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604,
605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617,
618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630,
631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643,
644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656,
657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669,
670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682,
683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695,
696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713, 714,
715, 718, 719, 720, 721, or active variants and fragments thereof,
and complements thereof, including, for example, SEQ ID NOS: 1, 9,
37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149, 153, 157,
169, 173, 181, 185, 189, 205, 217, 225, 233, 561, 562, 563, 564,
565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577,
578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590,
591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603,
604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616,
617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629,
630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642,
643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655,
656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668,
669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681,
682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, and active
variants and fragments thereof, and complements thereof, and SEQ ID
NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700, 701, 702, 703,
706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721 and
active variants and fragments thereof, and complements thereof may
be used. Methods for using antisense suppression to inhibit the
expression of endogenous genes in plants are described, for
example, in Liu et al (2002) Plant Physiol. 129:1732-1743 and U.S.
Pat. Nos. 5,759,829 and 5,942,657, each of which is herein
incorporated by reference.
[0032] iii. Double Stranded RNA Suppression Element
[0033] A "double stranded RNA silencing element" or "dsRNA"
comprises at least one transcript that is capable of forming a
dsRNA either before or after ingestion by a pest. Thus, a "dsRNA
silencing element" includes a dsRNA, a transcript or
polyribonucleotide capable of forming a dsRNA or more than one
transcript or polyribonucleotide capable of forming a dsRNA.
"Double stranded RNA" or "dsRNA" refers to a polyribonucleotide
structure formed either by a single self-complementary RNA molecule
or a polyribonucleotide structure formed by the expression of at
least two distinct RNA strands. The dsRNA molecule(s) employed in
the methods and compositions of the invention mediate the reduction
of expression of a target sequence, for example, by mediating RNA
interference "RNAi" or gene silencing in a sequence-specific
manner. In the context of the present invention, the dsRNA is
capable of reducing or eliminating the level or expression of a
target polynucleotide or the polypeptide encoded thereby in a
pest.
[0034] The dsRNA can reduce or eliminate the expression level of
the target sequence by influencing the level of the target RNA
transcript, by influencing translation and thereby affecting the
level of the encoded polypeptide, or by influencing expression at
the pre-transcriptional level (i.e., via the modulation of
chromatin structure, methylation pattern, etc., to alter gene
expression). See, for example, Verdel et al. (2004) Science
303:672-676; Pal-Bhadra et al. (2004) Science 303:669-672; Allshire
(2002) Science 297:1818-1819; Volpe et al. (2002) Science
297:1833-1837; Jenuwein (2002) Science 297:2215-2218; and Hall et
al. (2002) Science 297:2232-2237. Methods to assay for functional
dsRNA that are capable of reducing or eliminating the level of a
sequence of interest are disclosed elsewhere herein. Accordingly,
as used herein, the term "dsRNA" is meant to encompass other terms
used to describe nucleic acid molecules that are capable of
mediating RNA interference or gene silencing, including, for
example, short-interfering RNA (siRNA), double-stranded RNA
(dsRNA), micro-RNA (miRNA), hairpin RNA, short hairpin RNA (shRNA),
post-transcriptional gene silencing RNA (ptgsRNA), and others.
[0035] In specific embodiments, at least one strand of the duplex
or double-stranded region of the dsRNA shares sufficient sequence
identity or sequence complementarity to the target polynucleotide
to allow for the dsRNA to reduce the level of expression of the
target sequence. As used herein, the strand that is complementary
to the target polynucleotide is the "antisense strand" and the
strand homologous to the target polynucleotide is the "sense
strand."
[0036] In another embodiment, the dsRNA comprises a hairpin RNA. A
hairpin RNA comprises an RNA molecule that is capable of folding
back onto itself to form a double stranded structure. Multiple
structures can be employed as hairpin elements. In specific
embodiments, the dsRNA suppression element comprises a hairpin
element which comprises in the following order, a first segment, a
second segment, and a third segment, where the first and the third
segment share sufficient complementarity to allow the transcribed
RNA to form a double-stranded stem-loop structure.
[0037] The "second segment" of the hairpin comprises a "loop" or a
"loop region." These terms are used synonymously herein and are to
be construed broadly to comprise any nucleotide sequence that
confers enough flexibility to allow self-pairing to occur between
complementary regions of a polynucleotide (i.e., segments 1 and 3
which form the stem of the hairpin). For example, in some
embodiments, the loop region may be substantially single stranded
and act as a spacer between the self-complementary regions of the
hairpin stem-loop. In some embodiments, the loop region can
comprise a random or nonsense nucleotide sequence and thus not
share sequence identity to a target polynucleotide. In other
embodiments, the loop region comprises a sense or an antisense RNA
sequence or fragment thereof that shares identity to a target
polynucleotide. See, for example, International Patent Publication
No. WO 02/00904, herein incorporated by reference. In specific
embodiments, the loop region can be optimized to be as short as
possible while still providing enough intramolecular flexibility to
allow the formation of the base-paired stem region. Accordingly,
the loop sequence is generally less than 1000, 900, 800, 700, 600,
500, 400, 300, 200, 100, 50, 25, 20, 19, 18, 17, 16, 15, 10
nucleotides or less.
[0038] The "first" and the "third" segment of the hairpin RNA
molecule comprise the base-paired stem of the hairpin structure.
The first and the third segments are inverted repeats of one
another and share sufficient complementarity to allow the formation
of the base-paired stem region. In specific embodiments, the first
and the third segments are fully complementary to one another.
Alternatively, the first and the third segment may be partially
complementary to each other so long as they are capable of
hybridizing to one another to form a base-paired stem region. The
amount of complementarity between the first and the third segment
can be calculated as a percentage of the entire segment. Thus, the
first and the third segment of the hairpin RNA generally share at
least 50%, 60%, 70%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%,
97%, 98%, 99%, up to and including 100% complementarity.
[0039] The first and the third segment are at least about 1000,
500, 475, 450, 425, 400, 375, 350, 325, 300, 250, 225, 200, 175,
150, 125, 100, 75, 60, 50, 40, 30, 25, 22, 20, 19, 18, 17, 16, 15
or 10 nucleotides in length. In specific embodiments, the length of
the first and/or the third segment is about 10-100 nucleotides,
about 10 to about 75 nucleotides, about 10 to about 50 nucleotides,
about 10 to about 40 nucleotides, about 10 to about 35 nucleotides,
about 10 to about 30 nucleotides, about 10 to about 25 nucleotides,
about 10 to about 19 nucleotides, about 10 to about 20 nucleotides,
about 19 to about 50 nucleotides, about 50 nucleotides to about 100
nucleotides, about 100 nucleotides to about 150 nucleotides, about
100 nucleotides to about 300 nucleotides, about 150 nucleotides to
about 200 nucleotides, about 200 nucleotides to about 250
nucleotides, about 250 nucleotides to about 300 nucleotides, about
300 nucleotides to about 350 nucleotides, about 350 nucleotides to
about 400 nucleotides, about 400 nucleotide to about 500
nucleotides, about 600 nt, about 700 nt, about 800 nt, about 900
nt, about 1000 nt, about 1100 nt, about 1200 nt, 1300 nt, 1400 nt,
1500 nt, 1600 nt, 1700 nt, 1800 nt, 1900 nt, 2000 nt or longer. In
other embodiments, the length of the first and/or the third segment
comprises at least 10-19 nucleotides, 10-20 nucleotides; 19-35
nucleotides, 20-35 nucleotides; 30-45 nucleotides; 40-50
nucleotides; 50-100 nucleotides; 100-300 nucleotides; about 500-700
nucleotides; about 700-900 nucleotides; about 900-1100 nucleotides;
about 1300-1500 nucleotides; about 1500-1700 nucleotides; about
1700-1900 nucleotides; about 1900-2100 nucleotides; about 2100-2300
nucleotides; or about 2300-2500 nucleotides. See, for example,
International Publication No. WO 0200904.
[0040] Hairpin molecules or double-stranded RNA molecules of the
present invention may have more than one sequence of the present
invention or active fragments or variants, or complements thereof,
found in the same portion of the RNA molecule. For example, in a
chimeric hairpin structure, the first segment of a hairpin molecule
comprises two polynucleotide sections, each with a different
sequence of the present invention. For example, reading from one
terminus of the hairpin, the first segment is composed of sequences
from two separate genes (A followed by B). This first segment is
followed by the second segment, the loop portion of the hairpin.
The loop segment is followed by the third segment, where the
complementary strands of the sequences in the first segment are
found (B* followed by A*) in forming the stem-loop, hairpin
structure, the stem contains SeqA-A* at the distal end of the stem
and SeqB-B* proximal to the loop region.
[0041] In specific embodiments, the first and the third segment
comprise at least 20 nucleotides having at least 85% complementary
to the first segment. In still other embodiments, the first and the
third segments which form the stem-loop structure of the hairpin
comprises 3' or 5' overhang regions having unpaired nucleotide
residues.
[0042] In specific embodiments, the sequences used in the first,
the second, and/or the third segments comprise domains that are
designed to have sufficient sequence identity to a target
polynucleotide of interest and thereby have the ability to decrease
the level of expression of the target polynucleotide. The
specificity of the inhibitory RNA transcripts is therefore
generally conferred by these domains of the silencing element.
Thus, in some embodiments of the invention, the first, second
and/or third segment of the silencing element comprise a domain
having at least 10, at least 15, at least 19, at least 20, at least
21, at least 22, at least 23, at least 24, at least 25, at least
30, at least 40, at least 50, at least 100, at least 200, at least
300, at least 500, at least 1000, or more than 1000 nucleotides
that share sufficient sequence identity to the target
polynucleotide to allow for a decrease in expression levels of the
target polynucleotide when expressed in an appropriate cell. In
other embodiments, the domain is between about 15 to 50
nucleotides, about 19-35 nucleotides, about 20-35 nucleotides,
about 25-50 nucleotides, about 19 to 75 nucleotides, about 20 to 75
nucleotides, about 40-90 nucleotides about 15-100 nucleotides
10-100 nucleotides, about 10 to about 75 nucleotides, about 10 to
about 50 nucleotides, about 10 to about 40 nucleotides, about 10 to
about 35 nucleotides, about 10 to about 30 nucleotides, about 10 to
about 25 nucleotides, about 10 to about 20 nucleotides, about 10 to
about 19 nucleotides, about 50 nucleotides to about 100
nucleotides, about 100 nucleotides to about 150 nucleotides, about
150 nucleotides to about 200 nucleotides, about 200 nucleotides to
about 250 nucleotides, about 250 nucleotides to about 300
nucleotides, about 300 nucleotides to about 350 nucleotides, about
350 nucleotides to about 400 nucleotides, about 400 nucleotide to
about 500 nucleotides or longer. In other embodiments, the length
of the first and/or the third segment comprises at least 10-20
nucleotides, at least 10-19 nucleotides, 20-35 nucleotides, 30-45
nucleotides, 40-50 nucleotides, 50-100 nucleotides, or about
100-300 nucleotides.
[0043] In specific embodiments, the domain of the first, the
second, and/or the third segment has 100% sequence identity to the
target polynucleotide. In other embodiments, the domain of the
first, the second and/or the third segment having homology to the
target polypeptide have at least 50%, 60%, 70%, 80%, 85%, 90%, 91%,
92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or greater sequence
identity to a region of the target polynucleotide. The sequence
identity of the domains of the first, the second and/or the third
segments to the target polynucleotide need only be sufficient to
decrease expression of the target polynucleotide of interest. See,
for example, Chuang and Meyerowitz (2000) Proc. Natl. Acad. Sci.
USA 97:4985-4990; Stoutjesdijk et al. (2002) Plant Physiol.
129:1723-1731; Waterhouse and Helliwell (2003) Nat. Rev. Genet.
4:29-38; Pandolfini et al. BMC Biotechnology 3:7, and U.S. Patent
Publication No. 20030175965; each of which is herein incorporated
by reference. A transient assay for the efficiency of hpRNA
constructs to silence gene expression in vivo has been described by
Panstruga et al. (2003) Mol. Biol. Rep. 30:135-140, herein
incorporated by reference.
[0044] The amount of complementarity shared between the first,
second, and/or third segment and the target polynucleotide or the
amount of complementarity shared between the first segment and the
third segment (i.e., the stem of the hairpin structure) may vary
depending on the organism in which gene expression is to be
controlled. Some organisms or cell types may require exact pairing
or 100% identity, while other organisms or cell types may tolerate
some mismatching. In some cells, for example, a single nucleotide
mismatch in the targeting sequence abrogates the ability to
suppress gene expression. In these cells, the suppression cassettes
of the invention can be used to target the suppression of mutant
genes, for example, oncogenes whose transcripts comprise point
mutations and therefore they can be specifically targeted using the
methods and compositions of the invention without altering the
expression of the remaining wild-type allele. In other organisms,
holistic sequence variability may be tolerated as long as some 22nt
region of the sequence is represented in 100% homology between
target polynucleitide and the suppression cassette.
[0045] Any region of the target polynucleotide can be used to
design the domain of the silencing element that shares sufficient
sequence identity to allow expression of the hairpin transcript to
decrease the level of the target polynucleotide. For instance, the
domain can be designed to share sequence identity to the 5'
untranslated region of the target polynucleotide(s), the 3'
untranslated region of the target polynucleotide(s), exonic regions
of the target polynucleotide(s), intronic regions of the target
polynucleotide(s), and any combination thereof. In specific
embodiments, a domain of the silencing element shares sufficient
homology to at least about 15, 16, 17, 18, 19, 20, 22, 25 or 30
consecutive nucleotides from about nucleotides 1-50, 25-75, 75-125,
50-100, 125-175, 175-225, 100-150, 150-200, 200-250, 225-275,
275-325, 250-300, 325-375, 375-425, 300-350, 350-400, 425-475,
400-450, 475-525, 450-500, 525-575, 575-625, 550-600, 625-675,
675-725, 600-650, 625-675, 675-725, 650-700, 725-825, 825-875,
750-800, 875-925, 925-975, 850-900, 925-975, 975-1025, 950-1000,
1000-1050, 1025-1075, 1075-1125, 1050-1100, 1125-1175, 1100-1200,
1175-1225, 1225-1275, 1200-1300, 1325-1375, 1375-1425, 1300-1400,
1425-1475, 1475-1525, 1400-1500, 1525-1575, 1575-1625, 1625-1675,
1675-1725, 1725-1775, 1775-1825, 1825-1875, 1875-1925, 1925-1975,
1975-2025, 2025-2075, 2075-2125, 2125-2175, 2175-2225, 1500-1600,
1600-1700, 1700-1800, 1800-1900, 1900-2000 of the target sequence.
In some instances to optimize the siRNA sequences employed in the
hairpin, the synthetic oligodeoxyribonucleotide/RNAse H method can
be used to determine sites on the target mRNA that are in a
conformation that is susceptible to RNA silencing. See, for
example, Vickers et al. (2003) J. Biol. Chem 278:7108-7118 and Yang
et al. (2002) Proc. Natl. Acad. Sci. USA 99:9442-9447, herein
incorporated by reference. These studies indicate that there is a
significant correlation between the RNase-H-sensitive sites and
sites that promote efficient siRNA-directed mRNA degradation.
[0046] The hairpin silencing element may also be designed such that
the sense sequence or the antisense sequence do not correspond to a
target polynucleotide. In this embodiment, the sense and antisense
sequence flank a loop sequence that comprises a nucleotide sequence
corresponding to all or part of the target polynucleotide. Thus, it
is the loop region that determines the specificity of the RNA
interference. See, for example, WO 02/00904, herein incorporated by
reference.
[0047] In addition, transcriptional gene silencing (TGS) may be
accomplished through use of a hairpin suppression element where the
inverted repeat of the hairpin shares sequence identity with the
promoter region of a target polynucleotide to be silenced. See, for
example, Aufsatz et al. (2002) PNAS 99 (Suppl. 4):16499-16506 and
Mette et al. (2000) EMBO J 19(19):5194-5201.
[0048] In other embodiments, the silencing element can comprise a
small RNA (sRNA). sRNAs can comprise both micro RNA (miRNA) and
short-interfering RNA (siRNA) (Meister and Tuschl (2004) Nature
431:343-349 and Bonetta et al. (2004) Nature Methods 1:79-86).
miRNAs are regulatory agents comprising about 19 to about 24
ribonucleotides in length which are highly efficient at inhibiting
the expression of target polynucleotides. See, for example Javier
et al. (2003) Nature 425: 257-263, herein incorporated by
reference. For miRNA interference, the silencing element can be
designed to express a dsRNA molecule that forms a hairpin structure
or partially base-paired structure containing 19, 20, 21, 22, 23,
24 or 25-nucleotide sequence that is complementary to the target
polynucleotide of interest. The miRNA can be synthetically made, or
transcribed as a longer RNA which is subsequently cleaved to
produce the active miRNA. Specifically, the miRNA can comprise 19
nucleotides of the sequence having homology to a target
polynucleotide in sense orientation and 19 nucleotides of a
corresponding antisense sequence that is complementary to the sense
sequence. The miRNA can be an "artificial miRNA" or "amiRNA" which
comprises a miRNA sequence that is synthetically designed to
silence a target sequence.
[0049] When expressing an miRNA the final (mature) miRNA is present
in a duplex in a precursor backbone structure, the two strands
being referred to as the miRNA (the strand that will eventually
basepair with the target) and miRNA*(star sequence). It has been
demonstrated that miRNAs can be transgenically expressed and target
genes of interest efficiently silenced (Highly specific gene
silencing by artificial microRNAs in Arabidopsis Schwab R, Ossowski
S, Riester M, Warthmann N, Weigel D. Plant Cell. 2006 May;
18(5):1121-33. Epub 2006 Mar. 10 & Expression of artificial
microRNAs in transgenic Arabidopsis thaliana confers virus
resistance. Niu Q W, Lin S S, Reyes J L, Chen K C, Wu H W, Yeh S D,
Chua N H. Nat Biotechnol. 2006 November; 24(11):1420-8. Epub 2006
Oct. 22. Erratum in: Nat Biotechnol. 2007 February; 25(2):254.)
[0050] The silencing element for miRNA interference comprises a
miRNA primary sequence. The miRNA primary sequence comprises a DNA
sequence having the miRNA and star sequences separated by a loop as
well as additional sequences flanking this region that are
important for processing. When expressed as an RNA, the structure
of the primary miRNA is such as to allow for the formation of a
hairpin RNA structure that can be processed into a mature miRNA. In
some embodiments, the miRNA backbone comprises a genomic or cDNA
miRNA precursor sequence, wherein said sequence comprises a native
primary in which a heterologous (artificial) mature miRNA and star
sequence are inserted.
[0051] As used herein, a "star sequence" is the sequence within a
miRNA precursor backbone that is complementary to the miRNA and
forms a duplex with the miRNA to form the stem structure of a
hairpin RNA. In some embodiments, the star sequence can comprise
less than 100% complementarity to the miRNA sequence.
Alternatively, the star sequence can comprise at least 99%, 98%,
97%, 96%, 95%, 90%, 85%, 80% or lower sequence complementarity to
the miRNA sequence as long as the star sequence has sufficient
complementarity to the miRNA sequence to form a double stranded
structure. In still further embodiments, the star sequence
comprises a sequence having 1, 2, 3, 4, 5 or more mismatches with
the miRNA sequence and still has sufficient complementarity to form
a double stranded structure with the miRNA sequence resulting in
production of miRNA and suppression of the target sequence.
[0052] The miRNA precursor backbones can be from any plant. In some
embodiments, the miRNA precursor backbone is from a monocot. In
other embodiments, the miRNA precursor backbone is from a dicot. In
further embodiments, the backbone is from maize or soybean.
MicroRNA precursor backbones have been described previously. For
example, US20090155910A1 (WO 2009/079532) discloses the following
soybean miRNA precursor backbones: 156c, 159, 166b, 168c, 396b and
398b, and US20090155909A1 (WO 2009/079548) discloses the following
maize miRNA precursor backbones: 159c, 164h, 168a, 169r, and 396h.
Each of these references is incorporated by reference in their
entirety.
[0053] Thus, the primary miRNA can be altered to allow for
efficient insertion of heterologous miRNA and star sequences within
the miRNA precursor backbone. In such instances, the miRNA segment
and the star segment of the miRNA precursor backbone are replaced
with the heterologous miRNA and the heterologous star sequences,
designed to target any sequence of interest, using a PCR technique
and cloned into an expression construct. It is recognized that
there could be alterations to the position at which the artificial
miRNA and star sequences are inserted into the backbone. Detailed
methods for inserting the miRNA and star sequence into the miRNA
precursor backbone are described in, for example, US Patent
Applications 20090155909A1 and US20090155910A1, herein incorporated
by reference in their entirety.
[0054] When designing a miRNA sequence and star sequence, various
design choices can be made. See, for example, Schwab R, et al.
(2005) Dev Cell 8: 517-27. In non-limiting embodiments, the miRNA
sequences disclosed herein can have a "U" at the 5'-end, a "C" or
"G" at the 19th nucleotide position, and an "A" or "U" at the 10th
nucleotide position. In other embodiments, the miRNA design is such
that the miRNA have a high free delta-G as calculated using the
ZipFold algorithm (Markham, N. R. & Zuker, M. (2005) Nucleic
Acids Res. 33: W577-W581.) Optionally, a one base pair change can
be added within the 5' portion of the miRNA so that the sequence
differs from the target sequence by one nucleotide.
[0055] The methods and compositions of the invention employ
silencing elements that when transcribed "form" a dsRNA molecule.
Accordingly, the heterologous polynucleotide being expressed need
not form the dsRNA by itself, but can interact with other sequences
in the plant cell or in the pest gut after ingestion to allow the
formation of the dsRNA. For example, a chimeric polynucleotide that
can selectively silence the target polynucleotide can be generated
by expressing a chimeric construct comprising the target sequence
for a miRNA or siRNA to a sequence corresponding to all or part of
the gene or genes to be silenced. In this embodiment, the dsRNA is
"formed" when the target for the miRNA or siRNA interacts with the
miRNA present in the cell. The resulting dsRNA can then reduce the
level of expression of the gene or genes to be silenced. See, for
example, US Application Publication 2007-0130653, entitled "Methods
and Compositions for Gene Silencing", herein incorporated by
reference. The construct can be designed to have a target for an
endogenous miRNA or alternatively, a target for a heterologous
and/or synthetic miRNA can be employed in the construct. If a
heterologous and/or synthetic miRNA is employed, it can be
introduced into the cell on the same nucleotide construct as the
chimeric polynucleotide or on a separate construct. As discussed
elsewhere herein, any method can be used to introduce the construct
comprising the heterologous miRNA.
e. Silencing Elements
[0056] A silencing element may comprise a chimeric construction
molecule comprising two or more sequences of the present invention.
For example, the chimeric construction may be a hairpin or dsRNA as
disclosed herein. A chimera may comprise two or more sequences of
the present invention. Providing at least two different sequences
in a single silencing element may allow for targeting multiple
genes using one silencing element and/or for example, one
expression cassette. Targeting multiple genes may allow for slowing
or reducing the possibility of resistance by the pest, and
providing the multiple targeting ability in one expressed molecule
may reduce the expression burden of the transformed plant or plant
product, or provide topical treatments that are capable of
targeting multiple hosts with one application.
IV. Variants and Fragments
[0057] By "fragment" is intended a portion of the polynucleotide or
a portion of the amino acid sequence and hence protein encoded
thereby. Fragments of a polynucleotide may encode protein fragments
that retain the biological activity of the native protein.
Alternatively, fragments of a polynucleotide that are useful as a
silencing element do not need to encode fragment proteins that
retain biological activity. Thus, fragments of a nucleotide
sequence may range from at least about 10, about 15, about 16,
about 17, about 18, about 19, nucleotides, about 20 nucleotides,
about 22 nucleotides, about 50 nucleotides, about 75 nucleotides,
about 100 nucleotides, 200 nucleotides, 300 nucleotides, 400
nucleotides, 500 nucleotides, 600 nucleotides, 700 nucleotides and
up to the full-length polynucleotide employed in the invention.
Alternatively, fragments of a nucleotide sequence may range from
1-50, 25-75, 75-125, 50-100, 125-175, 175-225, 100-150, 100-300,
150-200, 200-250, 225-275, 275-325, 250-300, 325-375, 375-425,
300-350, 350-400, 425-475, 400-450, 475-525, 450-500, 525-575,
575-625, 550-600, 625-675, 675-725, 600-650, 625-675, 675-725,
650-700, 725-825, 825-875, 750-800, 875-925, 925-975, 850-900,
925-975, 975-1025, 950-1000, 1000-1050, 1025-1075, 1075-1125,
1050-1100, 1125-1175, 1100-1200, 1175-1225, 1225-1275, 1200-1300,
1325-1375, 1375-1425, 1300-1400, 1425-1475, 1475-1525, 1400-1500,
1525-1575, 1575-1625, 1625-1675, 1675-1725, 1725-1775, 1775-1825,
1825-1875, 1875-1925, 1925-1975, 1975-2025, 2025-2075, 2075-2125,
2125-2175, 2175-2225, 1500-1600, 1600-1700, 1700-1800, 1800-1900,
1900-2000 of any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17,
20, 21, 24, 25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52,
53, 54, 55, 56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81,
84, 85, 88, 89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112,
113, 116, 117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137,
140, 141, 144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164,
165, 168, 169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189,
192, 193, 196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216,
217, 220, 221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241,
244, 245, 248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268,
269, 272, 273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293,
296, 297, 300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320,
321, 324, 325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345,
348, 349, 352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372,
373, 376, 377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397,
400, 401, 404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424,
425, 428, 429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449,
452, 453, 456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476,
477, 480, 481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501,
504, 505, 508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528,
529, 532, 533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553,
556, 557, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570,
571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583,
584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596,
597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609,
610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622,
623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635,
636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648,
649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661,
662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674,
675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687,
688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702,
703, 706, 707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or
active variants and fragments thereof, and complements thereof,
including, for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77,
101, 113, 137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189,
205, 217, 225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569,
570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582,
583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595,
596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608,
609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621,
622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634,
635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647,
648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660,
661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673,
674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686,
687, 688, 689, 690, 691, 692, and active variants and fragments
thereof, and complements thereof, and SEQ ID NOS: 4, 140, 144, 148,
693, 694, 695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709,
712, 713, 714, 715, 718, 719, 720, 721 and active variants and
fragments thereof, and complements thereof. Methods to assay for
the activity of a desired silencing element are described elsewhere
herein.
[0058] "Variants" is intended to mean substantially similar
sequences. For polynucleotides, a variant comprises a deletion
and/or addition of one or more nucleotides at one or more internal
sites within the native polynucleotide and/or a substitution of one
or more nucleotides at one or more sites in the native
polynucleotide. A variant of a polynucleotide that is useful as a
silencing element will retain the ability to reduce expression of
the target polynucleotide and, in some embodiments, thereby control
a pest of interest. As used herein, a "native" polynucleotide or
polypeptide comprises a naturally occurring nucleotide sequence or
amino acid sequence, respectively. For polynucleotides,
conservative variants include those sequences that, because of the
degeneracy of the genetic code, encode the amino acid sequence of
one of the polypeptides employed in the invention. Variant
polynucleotides also include synthetically derived polynucleotide,
such as those generated, for example, by using site-directed
mutagenesis, but continue to retain the desired activity.
Generally, variants of a particular polynucleotide of the invention
(i.e., a silencing element) will have at least about 40%, 45%, 50%,
55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%,
96%, 97%, 98%, 99% or more sequence identity to that particular
polynucleotide as determined by sequence alignment programs and
parameters described elsewhere herein.
[0059] Variants of a particular polynucleotide of the invention
(i.e., the reference polynucleotide) can also be evaluated by
comparison of the percent sequence identity between the polypeptide
encoded by a variant polynucleotide and the polypeptide encoded by
the reference polynucleotide. Percent sequence identity between any
two polypeptides can be calculated using sequence alignment
programs and parameters described elsewhere herein. Where any given
pair of polynucleotides employed in the invention is evaluated by
comparison of the percent sequence identity shared by the two
polypeptides they encode, the percent sequence identity between the
two encoded polypeptides is at least about 40%, 45%, 50%, 55%, 60%,
65%, 70%, 75%, 80%, 85%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%,
98%, 99% or more sequence identity.
[0060] The following terms are used to describe the sequence
relationships between two or more polynucleotides or polypeptides:
(a) "reference sequence", (b) "comparison window", (c) "sequence
identity", and, (d) "percentage of sequence identity."
[0061] (a) As used herein, "reference sequence" is a defined
sequence used as a basis for sequence comparison. A reference
sequence may be a subset or the entirety of a specified sequence;
for example, as a segment of a full-length cDNA or gene sequence,
or the complete cDNA or gene sequence.
[0062] (b) As used herein, "comparison window" makes reference to a
contiguous and specified segment of a polynucleotide sequence,
wherein the polynucleotide sequence in the comparison window may
comprise additions or deletions (i.e., gaps) compared to the
reference sequence (which does not comprise additions or deletions)
for optimal alignment of the two polynucleotides. Generally, the
comparison window is at least 20 contiguous nucleotides in length,
and optionally can be 30, 40, 50, 100, or longer. Those of skill in
the art understand that to avoid a high similarity to a reference
sequence due to inclusion of gaps in the polynucleotide sequence a
gap penalty is typically introduced and is subtracted from the
number of matches.
[0063] Unless otherwise stated, sequence identity/similarity values
provided herein refer to the value obtained using GAP Version 10
using the following parameters: % identity and % similarity for a
nucleotide sequence using GAP Weight of 50 and Length Weight of 3,
and the nwsgapdna.cmp scoring matrix; % identity and % similarity
for an amino acid sequence using GAP Weight of 8 and Length Weight
of 2, and the BLOSUM62 scoring matrix; or any equivalent program
thereof. By "equivalent program" is intended any sequence
comparison program that, for any two sequences in question,
generates an alignment having identical nucleotide or amino acid
residue matches and an identical percent sequence identity when
compared to the corresponding alignment generated by GAP Version
10.
[0064] (c) As used herein, "sequence identity" or "identity" in the
context of two polynucleotides or polypeptide sequences makes
reference to the residues in the two sequences that are the same
when aligned for maximum correspondence over a specified comparison
window. When percentage of sequence identity is used in reference
to proteins it is recognized that residue positions which are not
identical often differ by conservative amino acid substitutions,
where amino acid residues are substituted for other amino acid
residues with similar chemical properties (e.g., charge or
hydrophobicity) and therefore do not change the functional
properties of the molecule. When sequences differ in conservative
substitutions, the percent sequence identity may be adjusted
upwards to correct for the conservative nature of the substitution.
Sequences that differ by such conservative substitutions are said
to have "sequence similarity" or "similarity". Means for making
this adjustment are well known to those of skill in the art.
Typically this involves scoring a conservative substitution as a
partial rather than a full mismatch, thereby increasing the
percentage sequence identity. Thus, for example, where an identical
amino acid is given a score of 1 and a non-conservative
substitution is given a score of zero, a conservative substitution
is given a score between zero and 1. The scoring of conservative
substitutions is calculated, e.g., as implemented in the program
PC/GENE (Intelligenetics, Mountain View, Calif.).
[0065] (d) As used herein, "percentage of sequence identity" means
the value determined by comparing two optimally aligned sequences
over a comparison window, wherein the portion of the polynucleotide
sequence in the comparison window may comprise additions or
deletions (i.e., gaps) as compared to the reference sequence (which
does not comprise additions or deletions) for optimal alignment of
the two sequences. The percentage is calculated by determining the
number of positions at which the identical nucleic acid base or
amino acid residue occurs in both sequences to yield the number of
matched positions, dividing the number of matched positions by the
total number of positions in the window of comparison, and
multiplying the result by 100 to yield the percentage of sequence
identity.
[0066] A method is further provided for identifying a silencing
element from the target polynucleotides set forth in SEQ ID NOS: 1,
4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29, 32, 33, 36, 37,
40, 41, 44, 45, 48, 49, 52, 53, 54, 55, 56, 57, 60, 61, 64, 65, 68,
69, 72, 73, 76, 77, 80, 81, 84, 85, 88, 89, 92, 93, 96, 97, 100,
101, 104, 105, 108, 109, 112, 113, 116, 117, 120, 121, 124, 125,
128, 129, 132, 133, 136, 137, 140, 141, 144, 145, 148, 149, 152,
153, 156, 157, 160, 161, 164, 165, 168, 169, 172, 173, 176, 177,
180, 181, 184, 185, 188, 189, 192, 193, 196, 197, 200, 201, 204,
205, 208, 209, 212, 213, 216, 217, 220, 221, 224, 225, 228, 229,
232, 233, 236, 237, 240, 241, 244, 245, 248, 249, 252, 253, 256,
257, 260, 261, 264, 265, 268, 269, 272, 273, 276, 277, 280, 281,
284, 285, 288, 289, 292, 293, 296, 297, 300, 301, 304, 305, 308,
309, 312, 313, 316, 317, 320, 321, 324, 325, 328, 329, 332, 333,
336, 337, 340, 341, 344, 345, 348, 349, 352, 353, 356, 357, 360,
361, 364, 365, 368, 369, 372, 373, 376, 377, 380, 381, 384, 385,
388, 389, 392, 393, 396, 397, 400, 401, 404, 405, 408, 409, 412,
413, 416, 417, 420, 421, 424, 425, 428, 429, 432, 433, 436, 437,
440, 441, 444, 445, 448, 449, 452, 453, 456, 457, 460, 461, 464,
465, 468, 469, 472, 473, 476, 477, 480, 481, 484, 485, 488, 489,
492, 493, 496, 497, 500, 501, 504, 505, 508, 509, 512, 513, 516,
517, 520, 521, 524, 525, 528, 529, 532, 533, 536, 537, 540, 541,
544, 545, 548, 549, 552, 553, 556, 557, 560, 561, 562, 563, 564,
565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577,
578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590,
591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603,
604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616,
617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629,
630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642,
643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655,
656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668,
669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681,
682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694,
695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713,
714, 715, 718, 719, 720, 721, or active variants and fragments
thereof, and complements thereof, including, for example, SEQ ID
NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113, 137, 141, 145, 149,
153, 157, 169, 173, 181, 185, 189, 205, 217, 225, 233, 561, 562,
563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575,
576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588,
589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601,
602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614,
615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627,
628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640,
641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653,
654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666,
667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679,
680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692,
and active variants and fragments thereof, and complements thereof,
and SEQ ID NOS: 4, 140, 144, 148, 693, 694, 695, 696, 697, 700,
701, 702, 703, 706, 707, 708, 709, 712, 713, 714, 715, 718, 719,
720, 721 and active variants and fragments thereof, and complements
thereof. Such methods comprise obtaining a candidate fragment of
any one of SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24,
25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55,
56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88,
89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116,
117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140, 141,
144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165, 168,
169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192, 193,
196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217, 220,
221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244, 245,
248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269, 272,
273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296, 297,
300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321, 324,
325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348, 349,
352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373, 376,
377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400, 401,
404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425, 428,
429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452, 453,
456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477, 480,
481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504, 505,
508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529, 532,
533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556, 557,
560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572,
573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585,
586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598,
599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611,
612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624,
625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637,
638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650,
651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663,
664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676,
677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689,
690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706,
707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or active
variants and fragments thereof, and complements thereof, including,
for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113,
137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189, 205, 217,
225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, and active variants and fragments thereof, and
complements thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694,
695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713,
714, 715, 718, 719, 720, 721 and active variants and fragments
thereof, and complements thereof, which is of sufficient length to
act as a silencing element and thereby reduce the expression of the
target polynucleotide and/or control a desired pest; expressing
said candidate polynucleotide fragment in an appropriate expression
cassette to produce a candidate silencing element and determining
is said candidate polynucleotide fragment has the activity of a
silencing element and thereby reduce the expression of the target
polynucleotide and/or controls a desired pest. Methods of
identifying such candidate fragments based on the desired pathway
for suppression are known. For example, various bioinformatics
programs can be employed to identify the region of the target
polynucleotides that could be exploited to generate a silencing
element. See, for example, Elbahir et al. (2001) Genes and
Development 15:188-200, Schwartz et al. (2003) Cell 115:199-208,
Khvorova et al. (2003) Cell 115:209-216. See also, siRNA at
Whitehead (jura.wi.mit.edu/bioc/siRNAext/) which calculates the
binding energies for both sense and antisense siRNAs. See, also
genscript.com/ssl-bin/app/rnai?op=known; Block-iT.TM. RNAi designer
from Invitrogen and GenScript siRNA Construct Builder.
V. DNA Constructs
[0067] The use of the term "polynucleotide" is not intended to
limit the present invention to polynucleotides comprising DNA.
Those of ordinary skill in the art will recognize that
polynucleotides can comprise ribonucleotides and combinations of
ribonucleotides and deoxyribonucleotides. Such deoxyribonucleotides
and ribonucleotides include both naturally occurring molecules and
synthetic analogues. The polynucleotides of the invention also
encompass all forms of sequences including, but not limited to,
single-stranded forms, double-stranded forms, hairpins,
stem-and-loop structures, and the like.
[0068] The polynucleotide encoding the silencing element or in
specific embodiments employed in the methods and compositions of
the invention can be provided in expression cassettes for
expression in a plant or organism of interest. It is recognized
that multiple silencing elements including multiple identical
silencing elements, multiple silencing elements targeting different
regions of the target sequence, or multiple silencing elements from
different target sequences can be used. In this embodiment, it is
recognized that each silencing element can be contained in a single
or separate cassette, DNA construct, or vector. As discussed, any
means of providing the silencing element is contemplated. A plant
or plant cell can be transformed with a single cassette comprising
DNA encoding one or more silencing elements or separate cassettes
comprising each silencing element can be used to transform a plant
or plant cell or host cell. Likewise, a plant transformed with one
component can be subsequently transformed with the second
component. One or more silencing elements can also be brought
together by sexual crossing. That is, a first plant comprising one
component is crossed with a second plant comprising the second
component. Progeny plants from the cross will comprise both
components.
[0069] The expression cassette can include 5' and 3' regulatory
sequences operably linked to the polynucleotide of the invention.
"Operably linked" is intended to mean a functional linkage between
two or more elements. For example, an operable linkage between a
polynucleotide of the invention and a regulatory sequence (i.e., a
promoter) is a functional link that allows for expression of the
polynucleotide of the invention. Operably linked elements may be
contiguous or non-contiguous. When used to refer to the joining of
two protein coding regions, by operably linked is intended that the
coding regions are in the same reading frame. The cassette may
additionally contain at least one additional polynucleotide to be
cotransformed into the organism. Alternatively, the additional
polypeptide(s) can be provided on multiple expression cassettes.
Expression cassettes can be provided with a plurality of
restriction sites and/or recombination sites for insertion of the
polynucleotide to be under the transcriptional regulation of the
regulatory regions. The expression cassette may additionally
contain selectable marker genes.
[0070] The expression cassette can include in the 5'-3' direction
of transcription, a transcriptional and translational initiation
region (i.e., a promoter), a polynucleotide comprising the
silencing element employed in the methods and compositions of the
invention, and a transcriptional and translational termination
region (i.e., termination region) functional in plants. In other
embodiment, the double stranded RNA is expressed from a suppression
cassette. Such a cassette can comprise two convergent promoters
that drive transcription of an operably linked silencing element.
"Convergent promoters" refers to promoters that are oriented on
either terminus of the operably linked silencing element such that
each promoter drives transcription of the silencing element in
opposite directions, yielding two transcripts. In such embodiments,
the convergent promoters allow for the transcription of the sense
and anti-sense strand and thus allow for the formation of a
dsRNA.
[0071] The regulatory regions (i.e., promoters, transcriptional
regulatory regions, and translational termination regions) and/or
the polynucleotides employed in the invention may be
native/analogous to the host cell or to each other. Alternatively,
the regulatory regions and/or the polynucleotide employed in the
invention may be heterologous to the host cell or to each other. As
used herein, "heterologous" in reference to a sequence is a
sequence that originates from a foreign species, or, if from the
same species, is substantially modified from its native form in
composition and/or genomic locus by deliberate human intervention.
For example, a promoter operably linked to a heterologous
polynucleotide is from a species different from the species from
which the polynucleotide was derived, or, if from the
same/analogous species, one or both are substantially modified from
their original form and/or genomic locus, or the promoter is not
the native promoter for the operably linked polynucleotide. As used
herein, a chimeric gene comprises a coding sequence operably linked
to a transcription initiation region that is heterologous to the
coding sequence.
[0072] The termination region may be native with the
transcriptional initiation region, may be native with the operably
linked polynucleotide encoding the silencing element, may be native
with the plant host, or may be derived from another source (i.e.,
foreign or heterologous) to the promoter, the polynucleotide
comprising silencing element, the plant host, or any combination
thereof. Convenient termination regions are available from the
Ti-plasmid of A. tumefaciens, such as the octopine synthase and
nopaline synthase termination regions. See also Guerineau et al.
(1991) Mol. Gen. Genet. 262:141-144; Proudfoot (1991) Cell
64:671-674; Sanfacon et al. (1991) Genes Dev. 5:141-149; Mogen et
al. (1990) Plant Cell 2:1261-1272; Munroe et al. (1990) Gene
91:151-158; Ballas et al. (1989) Nucleic Acids Res. 17:7891-7903;
and Joshi et al. (1987) Nucleic Acids Res. 15:9627-9639.
[0073] Additional sequence modifications are known to enhance gene
expression in a cellular host. These include elimination of
sequences encoding spurious polyadenylation signals, exon-intron
splice site signals, transposon-like repeats, and other such
well-characterized sequences that may be deleterious to gene
expression. The G-C content of the sequence may be adjusted to
levels average for a given cellular host, as calculated by
reference to known genes expressed in the host cell. When possible,
the sequence is modified to avoid predicted hairpin secondary mRNA
structures.
[0074] In preparing the expression cassette, the various DNA
fragments may be manipulated, so as to provide for the DNA
sequences in the proper orientation and, as appropriate, in the
proper reading frame. Toward this end, adapters or linkers may be
employed to join the DNA fragments or other manipulations may be
involved to provide for convenient restriction sites, removal of
superfluous DNA, removal of restriction sites, or the like. For
this purpose, in vitro mutagenesis, primer repair, restriction,
annealing, resubstitutions, e.g., transitions and transversions,
may be involved.
[0075] A number of promoters can be used in the practice of the
invention. The polynucleotide encoding the silencing element can be
combined with constitutive, tissue-preferred, or other promoters
for expression in plants.
[0076] Such constitutive promoters include, for example, the core
promoter of the Rsyn7 promoter and other constitutive promoters
disclosed in WO 99/43838 and U.S. Pat. No. 6,072,050; the core CaMV
35S promoter (Odell et al. (1985) Nature 313:810-812); rice actin
(McElroy et al. (1990) Plant Cell 2:163-171); ubiquitin
(Christensen et al. (1989) Plant Mol. Biol. 12:619-632 and
Christensen et al. (1992) Plant Mol. Biol. 18:675-689); pEMU (Last
et al. (1991) Theor. Appl. Genet. 81:581-588); MAS (Velten et al.
(1984) EMBO J. 3:2723-2730); ALS promoter (U.S. Pat. No.
5,659,026), and the like. Other constitutive promoters include, for
example, U.S. Pat. Nos. 5,608,149; 5,608,144; 5,604,121; 5,569,597;
5,466,785; 5,399,680; 5,268,463; 5,608,142; and 6,177,611.
[0077] An inducible promoter, for instance, a pathogen-inducible
promoter could also be employed. Such promoters include those from
pathogenesis-related proteins (PR proteins), which are induced
following infection by a pathogen; e.g., PR proteins, SAR proteins,
beta-1,3-glucanase, chitinase, etc. See, for example, Redolfi et
al. (1983) Neth. J. Plant Pathol. 89:245-254; Uknes et al. (1992)
Plant Cell 4:645-656; and Van Loon (1985) Plant Mol. Virol.
4:111-116. See also WO 99/43819, herein incorporated by
reference.
[0078] Additionally, as pathogens find entry into plants through
wounds or insect damage, a wound-inducible promoter may be used in
the constructions of the invention. Such wound-inducible promoters
include potato proteinase inhibitor (pin II) gene (Ryan (1990) Ann.
Rev. Phytopath. 28:425-449; Duan et al. (1996) Nature Biotechnology
14:494-498); wun1 and wun2, U.S. Pat. No. 5,428,148; win1 and win2
(Stanford et al. (1989) Mol. Gen. Genet. 215:200-208); systemin
(McGurl et al. (1992) Science 225:1570-1573); WIP1 (Rohmeier et al.
(1993) Plant Mol. Biol. 22:783-792; Eckelkamp et al. (1993) FEBS
Letters 323:73-76); MPI gene (Corderok et al. (1994) Plant J.
6(2):141-150); and the like, herein incorporated by reference.
[0079] Chemical-regulated promoters can be used to modulate the
expression of a gene in a plant through the application of an
exogenous chemical regulator. Depending upon the objective, the
promoter may be a chemical-inducible promoter, where application of
the chemical induces gene expression, or a chemical-repressible
promoter, where application of the chemical represses gene
expression. Chemical-inducible promoters are known in the art and
include, but are not limited to, the maize In2-2 promoter, which is
activated by benzenesulfonamide herbicide safeners, the maize GST
promoter, which is activated by hydrophobic electrophilic compounds
that are used as pre-emergent herbicides, and the tobacco PR-la
promoter, which is activated by salicylic acid. Other
chemical-regulated promoters of interest include steroid-responsive
promoters (see, for example, the glucocorticoid-inducible promoter
in Schena et al. (1991) Proc. Natl. Acad. Sci. USA 88:10421-10425
and McNellis et al. (1998) Plant J. 14(2):247-257) and
tetracycline-inducible and tetracycline-repressible promoters (see,
for example, Gatz et al. (1991) Mol. Gen. Genet. 227:229-237, and
U.S. Pat. Nos. 5,814,618 and 5,789,156), herein incorporated by
reference.
[0080] Tissue-preferred promoters can be utilized to target
enhanced expression within a particular plant tissue.
Tissue-preferred promoters include Yamamoto et al. (1997) Plant J.
12(2):255-265; Kawamata et al. (1997) Plant Cell Physiol.
38(7):792-803; Hansen et al. (1997) Mol. Gen Genet. 254(3):337-343;
Russell et al. (1997) Transgenic Res. 6(2):157-168; Rinehart et al.
(1996) Plant Physiol. 112(3):1331-1341; Van Camp et al. (1996)
Plant Physiol. 112(2):525-535; Canevascini et al. (1996) Plant
Physiol. 112(2):513-524; Yamamoto et al. (1994) Plant Cell Physiol.
35(5):773-778; Lam (1994) Results Probl. Cell Differ. 20:181-196;
Orozco et al. (1993) Plant Mol Biol. 23(6):1129-1138; Matsuoka et
al. (1993) Proc Natl. Acad. Sci. USA 90(20):9586-9590; and
Guevara-Garcia et al. (1993) Plant J. 4(3):495-505. Such promoters
can be modified, if necessary, for weak expression.
[0081] Leaf-preferred promoters are known in the art. See, for
example, Yamamoto et al. (1997) Plant J. 12(2):255-265; Kwon et al.
(1994) Plant Physiol. 105:357-67; Yamamoto et al. (1994) Plant Cell
Physiol. 35(5):773-778; Gotor et al. (1993) Plant J. 3:509-18;
Orozco et al. (1993) Plant Mol. Biol. 23(6):1129-1138; and Matsuoka
et al. (1993) Proc. Natl. Acad. Sci. USA 90(20):9586-9590.
[0082] Root-preferred promoters are known and can be selected from
the many available from the literature or isolated de novo from
various compatible species. See, for example, Hire et al. (1992)
Plant Mol. Biol. 20(2):207-218 (soybean root-specific glutamine
synthetase gene); Keller and Baumgartner (1991) Plant Cell
3(10):1051-1061 (root-specific control element in the GRP 1.8 gene
of French bean); Sanger et al. (1990) Plant Mol. Biol.
14(3):433-443 (root-specific promoter of the mannopine synthase
(MAS) gene of Agrobacterium tumefaciens); and Miao et al. (1991)
Plant Cell 3(1):11-22 (full-length cDNA clone encoding cytosolic
glutamine synthetase (GS), which is expressed in roots and root
nodules of soybean). See also Bogusz et al. (1990) Plant Cell
2(7):633-641, where two root-specific promoters isolated from
hemoglobin genes from the nitrogen-fixing nonlegume Parasponia
andersonii and the related non-nitrogen-fixing nonlegume Trema
tomentosa are described. The promoters of these genes were linked
to a .beta.-glucuronidase reporter gene and introduced into both
the nonlegume Nicotiana tabacum and the legume Lotus corniculatus,
and in both instances root-specific promoter activity was
preserved. Leach and Aoyagi (1991) describe their analysis of the
promoters of the highly expressed rolC and rolD root-inducing genes
of Agrobacterium rhizogenes (see Plant Science (Limerick)
79(1):69-76). They concluded that enhancer and tissue-preferred DNA
determinants are dissociated in those promoters. Teeri et al.
(1989) used gene fusion to lacZ to show that the Agrobacterium
T-DNA gene encoding octopine synthase is especially active in the
epidermis of the root tip and that the TR2' gene is root specific
in the intact plant and stimulated by wounding in leaf tissue, an
especially desirable combination of characteristics for use with an
insecticidal or larvicidal gene (see EMBO J. 8(2):343-350). The
TR1' gene, fused to nptll (neomycin phosphotransferase II) showed
similar characteristics. Additional root-preferred promoters
include the VfENOD-GRP3 gene promoter (Kuster et al. (1995) Plant
Mol. Biol. 29(4):759-772); and rolB promoter (Capana et al. (1994)
Plant Mol. Biol. 25(4):681-691. See also U.S. Pat. Nos. 5,837,876;
5,750,386; 5,633,363; 5,459,252; 5,401,836; 5,110,732; and
5,023,179.
[0083] In one embodiment of this invention the plant-expressed
promoter is a vascular-specific promoter such as a phloem-specific
promoter. A "vascular-specific" promoter, as used herein, is a
promoter which is at least expressed in vascular cells, or a
promoter which is preferentially expressed in vascular cells.
Expression of a vascular-specific promoter need not be exclusively
in vascular cells, expression in other cell types or tissues is
possible. A "phloem-specific promoter" as used herein, is a
plant-expressible promoter which is at least expressed in phloem
cells, or a promoter which is preferentially expressed in phloem
cells.
[0084] Expression of a phloem-specific promoter need not be
exclusively in phloem cells, expression in other cell types or
tissues, e.g., xylem tissue, is possible. In one embodiment of this
invention, a phloem-specific promoter is a plant-expressible
promoter at least expressed in phloem cells, wherein the expression
in non-phloem cells is more limited (or absent) compared to the
expression in phloem cells. Examples of suitable vascular-specific
or phloem-specific promoters in accordance with this invention
include but are not limited to the promoters selected from the
group consisting of: the SCSV3, SCSV4, SCSV5, and SCSV7 promoters
(Schunmann et al. (2003) Plant Functional Biology 30:453-60; the
rolC gene promoter of Agrobacterium rhizogenes(Kiyokawa et al.
(1994) Plant Physiology 104:801-02; Pandolfini et al. (2003)
BioMedCentral (BMC) Biotechnology 3:7,
(www.biomedcentral.com/1472-6750/3/7); Graham et al. (1997) Plant
Mol. Biol. 33:729-35; Guivarc'h et al. (1996); Almon et al. (1997)
Plant Physiol. 115:1599-607; the rolA gene promoter of
Agrobacterium rhizogenes (Dehio et al. (1993) Plant Mol. Biol.
23:1199-210); the promoter of the Agrobacterium tumefaciens T-DNA
gene 5 (Korber et al. (1991) EMBO J. 10:3983-91); the rice sucrose
synthase RSs1 gene promoter (Shi et al. (1994) J. Exp. Bot.
45:623-31); the CoYMV or Commelina yellow mottle badnavirus
promoter (Medberry et al. (1992) Plant Cell 4:185-92; Zhou et al.
(1998) Chin. J. Biotechnol. 14:9-16); the CFDV or coconut foliar
decay virus promoter (Rohde et al. (1994) Plant Mol. Biol.
27:623-28; Hehn and Rhode (1998) J. Gen. Virol. 79:1495-99); the
RTBV or rice tungro bacilliform virus promoter (Yin and Beachy
(1995) Plant J. 7:969-80; Yin et al. (1997) Plant J. 12:1179-80);
the pea glutamin synthase GS3A gene (Edwards et al. (1990) Proc.
Natl. Acad. Sci. USA 87:3459-63; Brears et al. (1991) Plant J.
1:235-44); the inv CD111 and inv CD141 promoters of the potato
invertase genes (Hedley et al. (2000) J. Exp. Botany 51:817-21);
the promoter isolated from Arabidopsis shown to have
phloem-specific expression in tobacco by Kertbundit et al. (1991)
Proc. Natl. Acad. Sci. USA 88:5212-16); the VAHOX1 promoter region
(Tornero et al. (1996) Plant J. 9:639-48); the pea cell wall
invertase gene promoter (Zhang et al. (1996) Plant Physiol.
112:1111-17); the promoter of the endogenous cotton protein related
to chitinase of US published patent application 20030106097, an
acid invertase gene promoter from carrot (Ramloch-Lorenz et al.
(1993) The Plant J. 4:545-54); the promoter of the sulfate
transporter geneSultrl; 3 (Yoshimoto et al. (2003) Plant Physiol.
131:1511-17); a promoter of a sucrose synthase gene (Nolte and Koch
(1993) Plant Physiol. 101:899-905); and the promoter of a tobacco
sucrose transporter gene (Kuhn et al. (1997) Science
275-1298-1300).
[0085] Possible promoters also include the Black Cherry promoter
for Prunasin Hydrolase (PH DL1.4 PRO) (U.S. Pat. No. 6,797,859),
Thioredoxin H promoter from cucumber and rice (Fukuda A et al.
(2005). Plant Cell Physiol. 46(11):1779-86), Rice (RSs1) (Shi, T.
Wang et al. (1994). J. Exp. Bot. 45(274): 623-631) and maize
sucrose synthese -1 promoters (Yang., N-S. et al. (1990) PNAS
87:4144-4148), PP2 promoter from pumpkin Guo, H. et al. (2004)
Transgenic Research 13:559-566), At SUC2 promoter (Truernit, E. et
al. (1995) Planta 196(3):564-70., At SAM-1 (S-adenosylmethionine
synthetase) (Mijnsbrugge KV. et al. (1996) Planr. Cell. Physiol.
37(8): 1108-1115), and the Rice tungro bacilliform virus (RTBV)
promoter (Bhattacharyya-Pakrasi et al. (1993) Plant J.
4(1):71-79).
[0086] The expression cassette can also comprise a selectable
marker gene for the selection of transformed cells. Selectable
marker genes are utilized for the selection of transformed cells or
tissues. Marker genes include genes encoding antibiotic resistance,
such as those encoding neomycin phosphotransferase II (NEO) and
hygromycin phosphotransferase (HPT), as well as genes conferring
resistance to herbicidal compounds, such as glufosinate ammonium,
bromoxynil, imidazolinones, and 2,4-dichlorophenoxyacetate (2,4-D).
Additional selectable markers include phenotypic markers such as
.beta.-galactosidase and fluorescent proteins such as green
fluorescent protein (GFP) (Su et al. (2004) Biotechnol Bioeng
85:610-9 and Fetter et al. (2004) Plant Cell 16:215-28), cyan
florescent protein (CYP) (Bolte et al. (2004) J. Cell Science
117:943-54 and Kato et al. (2002) Plant Physiol 129:913-42), and
yellow florescent protein (PhiYFP.TM. from Evrogen, see, Bolte et
al. (2004) J. Cell Science 117:943-54). For additional selectable
markers, see generally, Yarranton (1992) Curr. Opin. Biotech.
3:506-511; Christopherson et al. (1992) Proc. Natl. Acad. Sci. USA
89:6314-6318; Yao et al. (1992) Cell 71:63-72; Reznikoff (1992)
Mol. Microbiol. 6:2419-2422; Barkley et al. (1980) in The Operon,
pp. 177-220; Hu et al. (1987) Cell 48:555-566; Brown et al. (1987)
Cell 49:603-612; Figge et al. (1988) Cell 52:713-722; Deuschle et
al. (1989) Proc. Natl. Acad. Sci. USA 86:5400-5404; Fuerst et al.
(1989) Proc. Natl. Acad. Sci. USA 86:2549-2553; Deuschle et al.
(1990) Science 248:480-483; Gossen (1993) Ph.D. Thesis, University
of Heidelberg; Reines et al. (1993) Proc. Natl. Acad. Sci. USA
90:1917-1921; Labow et al. (1990) Mol. Cell. Biol. 10:3343-3356;
Zambretti et al. (1992) Proc. Natl. Acad. Sci. USA 89:3952-3956;
Baim et al. (1991) Proc. Natl. Acad. Sci. USA 88:5072-5076;
Wyborski et al. (1991) Nucleic Acids Res. 19:4647-4653;
Hillenand-Wissman (1989) Topics Mol. Struc. Biol. 10:143-162;
Degenkolb et al. (1991) Antimicrob. Agents Chemother. 35:1591-1595;
Kleinschnidt et al. (1988) Biochemistry 27:1094-1104; Bonin (1993)
Ph.D. Thesis, University of Heidelberg; Gossen et al. (1992) Proc.
Natl. Acad. Sci. USA 89:5547-5551; Oliva et al. (1992) Antimicrob.
Agents Chemother. 36:913-919; Hlavka et al. (1985) Handbook of
Experimental Pharmacology, Vol. 78 (Springer-Verlag, Berlin); Gill
et al. (1988) Nature 334:721-724. Such disclosures are herein
incorporated by reference. The above list of selectable marker
genes is not meant to be limiting. Any selectable marker gene can
be used in the present invention.
VI. Compositions Comprising Silencing Elements
[0087] One or more of the polynucleotides comprising the silencing
element can be provided as an external composition such as a spray
or powder to the plant, plant part, seed, a pest, or an area of
cultivation. In another example, a plant is transformed with a DNA
construct or expression cassette for expression of at least one
silencing element. In either composition, the silencing element,
when ingested by an insect, can reduce the level of a target pest
sequence and thereby control the pest (i.e., a Coleopteran plant
pest including a Diabrotica plant pest, such as, D. virgifera
virgifera, D. barberi, D. virgifera zeae, D. speciosa, or D.
undecimpunctata howardi). It is recognized that the composition can
comprise a cell (such as plant cell or a bacterial cell), in which
a polynucleotide encoding the silencing element is stably
incorporated into the genome and operably linked to promoters
active in the cell. Compositions comprising a mixture of cells,
some cells expressing at least one silencing element are also
encompassed. In other embodiments, compositions comprising the
silencing elements are not contained in a cell. In such
embodiments, the composition can be applied to an area inhabited by
a pest. In one embodiment, the composition is applied externally to
a plant (i.e., by spraying a field or area of cultivation) to
protect the plant from the pest. Methods of applying nucleotides in
such a manner are known to those of skill in the art.
[0088] The composition of the invention can further be formulated
as bait. In this embodiment, the compositions comprise a food
substance or an attractant which enhances the attractiveness of the
composition to the pest.
[0089] The composition comprising the silencing element can be
formulated in an agriculturally suitable and/or environmentally
acceptable carrier. Such carriers can be any material that the
animal, plant or environment to be treated can tolerate.
Furthermore, the carrier must be such that the composition remains
effective at controlling a pest. Examples of such carriers include
water, saline, Ringer's solution, dextrose or other sugar
solutions, Hank's solution, and other aqueous physiologically
balanced salt solutions, phosphate buffer, bicarbonate buffer and
Tris buffer. In addition, the composition may include compounds
that increase the half-life of a composition. Various insecticidal
formulations can also be found in, for example, US Publications
2008/0275115, 2008/0242174, 2008/0027143, 2005/0042245, and
2004/0127520, each of which is herein incorporated by
reference.
[0090] It is recognized that the polynucleotides comprising
sequences encoding the silencing element can be used to transform
organisms to provide for host organism production of these
components, and subsequent application of the host organism to the
environment of the target pest(s). Such host organisms include
baculoviruses, bacteria, and the like. In this manner, the
combination of polynucleotides encoding the silencing element may
be introduced via a suitable vector into a microbial host, and said
host applied to the environment, or to plants or animals.
[0091] The term "introduced" in the context of inserting a nucleic
acid into a cell, means "transfection" or "transformation" or
"transduction" and includes reference to the incorporation of a
nucleic acid into a eukaryotic or prokaryotic cell where the
nucleic acid may be stably incorporated into the genome of the cell
(e.g., chromosome, plasmid, plastid, or mitochondrial DNA),
converted into an autonomous replicon, or transiently expressed
(e.g., transfected mRNA).
[0092] Microbial hosts that are known to occupy the "phytosphere"
(phylloplane, phyllosphere, rhizosphere, and/or rhizoplana) of one
or more crops of interest may be selected. These microorganisms are
selected so as to be capable of successfully competing in the
particular environment with the wild-type microorganisms, provide
for stable maintenance and expression of the sequences encoding the
silencing element, and desirably, provide for improved protection
of the components from environmental degradation and
inactivation.
[0093] Such microorganisms include bacteria, algae, and fungi. Of
particular interest are microorganisms such as bacteria, e.g.,
Pseudomonas, Erwinia, Serratia, Klebsiella, Xanthomonas,
Streptomyces, Rhizobium, Rhodopseudomonas, Methylius,
Agrobacterium, Acetobacter, Lactobacillus, Arthrobacter,
Azotobacter, Leuconostoc, and Alcaligenes, fungi, particularly
yeast, e.g., Saccharomyces, Cryptococcus, Kluyveromyces,
Sporobolomyces, Rhodotorula, and Aureobasidium. Of particular
interest are such phytosphere bacterial species as Pseudomonas
syringae, Pseudomonas fluorescens, Serratia marcescens, Acetobacter
xylinum, Agrobacteria, Rhodopseudomonas spheroides, Xanthomonas
campestris, Rhizobium melioti, Alcaligenes entrophus, Clavibacter
xyli and Azotobacter vinlandir, and phytosphere yeast species such
as Rhodotorula rubra, R. glutinis, R. marina, R. aurantiaca,
Cryptococcus albidus, C. diffluens, C. laurentii, Saccharomyces
rosei, S. pretoriensis, S. cerevisiae, Sporobolomyces rosues, S.
odorus, Kluyveromyces veronae, and Aureobasidium pollulans. Of
particular interest are the pigmented microorganisms.
[0094] A number of ways are available for introducing the
polynucleotide comprising the silencing element into the microbial
host under conditions that allow for stable maintenance and
expression of such nucleotide encoding sequences. For example,
expression cassettes can be constructed which include the
nucleotide constructs of interest operably linked with the
transcriptional and translational regulatory signals for expression
of the nucleotide constructs, and a nucleotide sequence homologous
with a sequence in the host organism, whereby integration will
occur, and/or a replication system that is functional in the host,
whereby integration or stable maintenance will occur.
[0095] Transcriptional and translational regulatory signals
include, but are not limited to, promoters, transcriptional
initiation start sites, operators, activators, enhancers, other
regulatory elements, ribosomal binding sites, an initiation codon,
termination signals, and the like. See, for example, U.S. Pat. Nos.
5,039,523 and 4,853,331; EPO 0480762A2; Sambrook et al. (2000);
Molecular Cloning: A Laboratory Manual (3rd ed.; Cold Spring Harbor
Laboratory Press, Plainview, N.Y.); Davis et al. (1980) Advanced
Bacterial Genetics (Cold Spring Harbor Laboratory, Cold Spring
Harbor, N.Y.); and the references cited therein.
[0096] Suitable host cells include the prokaryotes and the lower
eukaryotes, such as fungi. Illustrative prokaryotes, both
Gram-negative and Gram-positive, include Enterobacteriaceae, such
as Escherichia, Erwinia, Shigella, Salmonella, and Proteus;
Bacillaceae; Rhizobiceae, such as Rhizobium; Spirillaceae, such as
photobacterium, Zymomonas, Serratia, Aeromonas, Vibrio,
Desulfovibrio, Spirillum; Lactobacillaceae; Pseudomonadaceae, such
as Pseudomonas and Acetobacter; Azotobacteraceae and
Nitrobacteraceae. Among eukaryotes are fungi, such as Phycomycetes
and Ascomycetes, which includes yeast, such as Saccharomyces and
Schizosaccharomyces; and Basidiomycetes yeast, such as Rhodotorula,
Aureobasidium, Sporobolomyces, and the like.
[0097] Characteristics of particular interest in selecting a host
cell for purposes of the invention include ease of introducing the
coding sequence into the host, availability of expression systems,
efficiency of expression, stability in the host, and the presence
of auxiliary genetic capabilities. Characteristics of interest for
use as a pesticide microcapsule include protective qualities, such
as thick cell walls, pigmentation, and intracellular packaging or
formation of inclusion bodies; leaf affinity; lack of mammalian
toxicity; attractiveness to pests for ingestion; and the like.
Other considerations include ease of formulation and handling,
economics, storage stability, and the like.
[0098] Host organisms of particular interest include yeast, such as
Rhodotorula spp., Aureobasidium spp., Saccharomyces spp., and
Sporobolomyces spp., phylloplane organisms such as Pseudomonas
spp., Erwinia spp., and Flavobacterium spp., and other such
organisms, including Pseudomonas aeruginosa, Pseudomonas
fluorescens, Saccharomyces cerevisiae, Bacillus thuringiensis,
Escherichia coli, Bacillus subtilis, and the like.
[0099] The sequences encoding the silencing elements encompassed by
the invention can be introduced into microorganisms that multiply
on plants (epiphytes) to deliver these components to potential
target pests. Epiphytes, for example, can be gram-positive or
gram-negative bacteria.
[0100] The silencing element can be fermented in a bacterial host
and the resulting bacteria processed and used as a microbial spray
in the same manner that Bacillus thuringiensis strains have been
used as insecticidal sprays. Any suitable microorganism can be used
for this purpose. By way of example, Pseudomonas has been used to
express Bacillus thuringiensis endotoxins as encapsulated proteins
and the resulting cells processed and sprayed as an insecticide
Gaertner et al. (1993), in Advanced Engineered Pesticides, ed. L.
Kim (Marcel Decker, Inc.).
[0101] Alternatively, the components of the invention are produced
by introducing heterologous genes into a cellular host. Expression
of the heterologous sequences results, directly or indirectly, in
the intracellular production of the silencing element. These
compositions may then be formulated in accordance with conventional
techniques for application to the environment hosting a target
pest, e.g., soil, water, and foliage of plants. See, for example,
EPA 0192319, and the references cited therein.
[0102] In the present invention, a transformed microorganism can be
formulated with an acceptable carrier into separate or combined
compositions that are, for example, a suspension, a solution, an
emulsion, a dusting powder, a dispersible granule, a wettable
powder, and an emulsifiable concentrate, an aerosol, an impregnated
granule, an adjuvant, a coatable paste, and also encapsulations in,
for example, polymer substances.
[0103] Such compositions disclosed above may be obtained by the
addition of a surface-active agent, an inert carrier, a
preservative, a humectant, a feeding stimulant, an attractant, an
encapsulating agent, a binder, an emulsifier, a dye, a UV
protectant, a buffer, a flow agent or fertilizers, micronutrient
donors, or other preparations that influence plant growth. One or
more agrochemicals including, but not limited to, herbicides,
insecticides, fungicides, bactericides, nematicides, molluscicides,
acaracides, plant growth regulators, harvest aids, and fertilizers,
can be combined with carriers, surfactants or adjuvants customarily
employed in the art of formulation or other components to
facilitate product handling and application for particular target
pests. Suitable carriers and adjuvants can be solid or liquid and
correspond to the substances ordinarily employed in formulation
technology, e.g., natural or regenerated mineral substances,
solvents, dispersants, wetting agents, tackifiers, binders, or
fertilizers. The active ingredients of the present invention (i.e.,
at least one silencing element) are normally applied in the form of
compositions and can be applied to the crop area, plant, or seed to
be treated. For example, the compositions may be applied to grain
in preparation for or during storage in a grain bin or silo, etc.
The compositions may be applied simultaneously or in succession
with other compounds. Methods of applying an active ingredient or a
composition that contains at least one silencing element include,
but are not limited to, foliar application, seed coating, and soil
application. The number of applications and the rate of application
depend on the intensity of infestation by the corresponding
pest.
[0104] Suitable surface-active agents include, but are not limited
to, anionic compounds such as a carboxylate of, for example, a
metal; carboxylate of a long chain fatty acid; an
N-acylsarcosinate; mono- or di-esters of phosphoric acid with fatty
alcohol ethoxylates or salts of such esters; fatty alcohol sulfates
such as sodium dodecyl sulfate, sodium octadecyl sulfate, or sodium
cetyl sulfate; ethoxylated fatty alcohol sulfates; ethoxylated
alkylphenol sulfates; lignin sulfonates; petroleum sulfonates;
alkyl aryl sulfonates such as alkyl-benzene sulfonates or lower
alkylnaphtalene sulfonates, e.g., butyl-naphthalene sulfonate;
salts of sulfonated naphthalene-formaldehyde condensates; salts of
sulfonated phenol-formaldehyde condensates; more complex sulfonates
such as the amide sulfonates, e.g., the sulfonated condensation
product of oleic acid and N-methyl taurine; or the dialkyl
sulfosuccinates, e.g., the sodium sulfonate or dioctyl succinate.
Non-ionic agents include condensation products of fatty acid
esters, fatty alcohols, fatty acid amides or fatty-alkyl- or
alkenyl-substituted phenols with ethylene oxide, fatty esters of
polyhydric alcohol ethers, e.g., sorbitan fatty acid esters,
condensation products of such esters with ethylene oxide, e.g.,
polyoxyethylene sorbitan fatty acid esters, block copolymers of
ethylene oxide and propylene oxide, acetylenic glycols such as
2,4,7,9-tetraethyl-5-decyn-4,7-diol, or ethoxylated acetylenic
glycols. Examples of a cationic surface-active agent include, for
instance, an aliphatic mono-, di-, or polyamine such as an acetate,
naphthenate or oleate; or oxygen-containing amine such as an amine
oxide of polyoxyethylene alkylamine; an amide-linked amine prepared
by the condensation of a carboxylic acid with a di- or polyamine;
or a quaternary ammonium salt.
[0105] Examples of inert materials include, but are not limited to,
inorganic minerals such as kaolin, phyllosilicates, carbonates,
sulfates, phosphates, or botanical materials such as cork, powdered
corncobs, peanut hulls, rice hulls, and walnut shells.
[0106] The compositions comprising the silencing element can be in
a suitable form for direct application or as a concentrate of
primary composition that requires dilution with a suitable quantity
of water or other dilutant before application.
[0107] The compositions (including the transformed microorganisms)
can be applied to the environment of an insect pest (such as a
Coleoptera plant pest or a Diabrotica plant pest) by, for example,
spraying, atomizing, dusting, scattering, coating or pouring,
introducing into or on the soil, introducing into irrigation water,
by seed treatment or general application or dusting at the time
when the pest has begun to appear or before the appearance of pests
as a protective measure. For example, the composition(s) and/or
transformed microorganism(s) may be mixed with grain to protect the
grain during storage. It is generally important to obtain good
control of pests in the early stages of plant growth, as this is
the time when the plant can be most severely damaged. The
compositions can conveniently contain another insecticide if this
is thought necessary. In an embodiment of the invention, the
composition(s) is applied directly to the soil, at a time of
planting, in granular form of a composition of a carrier and dead
cells of a Bacillus strain or transformed microorganism of the
invention. Another embodiment is a granular form of a composition
comprising an agrochemical such as, for example, a herbicide, an
insecticide, a fertilizer, in an inert carrier, and dead cells of a
Bacillus strain or transformed microorganism of the invention.
VII. Plants, Plant Parts, and Methods of Introducing Sequences into
Plants
[0108] In one embodiment, the methods of the invention involve
introducing a polynucleotide into a plant. "Introducing" is
intended to mean presenting to the plant the polynucleotide in such
a manner that the sequence gains access to the interior of a cell
of the plant. The methods of the invention do not depend on a
particular method for introducing a sequence into a plant, only
that the polynucleotide or polypeptides gains access to the
interior of at least one cell of the plant. Methods for introducing
polynucleotides into plants are known in the art including, but not
limited to, stable transformation methods, transient transformation
methods, and virus-mediated methods.
[0109] "Stable transformation" is intended to mean that the
nucleotide construct introduced into a plant integrates into the
genome of the plant and is capable of being inherited by the
progeny thereof. "Transient transformation" is intended to mean
that a polynucleotide is introduced into the plant and does not
integrate into the genome of the plant or a polypeptide is
introduced into a plant.
[0110] Transformation protocols as well as protocols for
introducing polypeptides or polynucleotide sequences into plants
may vary depending on the type of plant or plant cell, i.e.,
monocot or dicot, targeted for transformation. Suitable methods of
introducing polypeptides and polynucleotides into plant cells
include microinjection (Crossway et al. (1986) Biotechniques
4:320-334), electroporation (Riggs et al. (1986) Proc. Natl. Acad.
Sci. USA 83:5602-5606, Agrobacterium-mediated transformation (U.S.
Pat. No. 5,563,055 and U.S. Pat. No. 5,981,840), direct gene
transfer (Paszkowski et al. (1984) EMBO J. 3:2717-2722), and
ballistic particle acceleration (see, for example, U.S. Pat. No.
4,945,050; U.S. Pat. No. 5,879,918; U.S. Pat. Nos. 5,886,244; and,
5,932,782; Tomes et al. (1995) in Plant Cell, Tissue, and Organ
Culture: Fundamental Methods, ed. Gamborg and Phillips
(Springer-Verlag, Berlin); McCabe et al. (1988) Biotechnology
6:923-926); and Led 1 transformation (WO 00/28058). Also see
Weissinger et al. (1988) Ann. Rev. Genet. 22:421-477; Sanford et
al. (1987) Particulate Science and Technology 5:27-37 (onion);
Christou et al. (1988) Plant Physiol. 87:671-674 (soybean); McCabe
et al. (1988) Bio/Technology 6:923-926 (soybean); Finer and
McMullen (1991) In Vitro Cell Dev. Biol. 27P:175-182 (soybean);
Singh et al. (1998) Theor. Appl. Genet. 96:319-324 (soybean); Datta
et al. (1990) Biotechnology 8:736-740 (rice); Klein et al. (1988)
Proc. Natl. Acad. Sci. USA 85:4305-4309 (maize); Klein et al.
(1988) Biotechnology 6:559-563 (maize); U.S. Pat. Nos. 5,240,855;
5,322,783; and, 5,324,646; Klein et al. (1988) Plant Physiol.
91:440-444 (maize); Fromm et al. (1990) Biotechnology 8:833-839
(maize); Hooykaas-Van Slogteren et al. (1984) Nature (London)
311:763-764; U.S. Pat. No. 5,736,369 (cereals); Bytebier et al.
(1987) Proc. Natl. Acad. Sci. USA 84:5345-5349 (Liliaceae); De Wet
et al. (1985) in The Experimental Manipulation of Ovule Tissues,
ed. Chapman et al. (Longman, New York), pp. 197-209 (pollen);
Kaeppler et al. (1990) Plant Cell Reports 9:415-418 and Kaeppler et
al. (1992) Theor. Appl. Genet. 84:560-566 (whisker-mediated
transformation); D'Halluin et al. (1992) Plant Cell 4:1495-1505
(electroporation); Li et al. (1993) Plant Cell Reports 12:250-255
and Christou and Ford (1995) Annals of Botany 75:407-413 (rice);
Osjoda et al. (1996) Nature Biotechnology 14:745-750 (maize via
Agrobacterium tumefaciens); all of which are herein incorporated by
reference.
[0111] In specific embodiments, the silencing element sequences of
the invention can be provided to a plant using a variety of
transient transformation methods. Such transient transformation
methods include, but are not limited to, the introduction of the
protein or variants and fragments thereof directly into the plant
or the introduction of the transcript into the plant. Such methods
include, for example, microinjection or particle bombardment. See,
for example, Crossway et al. (1986) Mol Gen. Genet. 202:179-185;
Nomura et al. (1986) Plant Sci. 44:53-58; Hepler et al. (1994)
Proc. Natl. Acad. Sci. 91: 2176-2180 and Hush et al. (1994) The
Journal of Cell Science 107:775-784, all of which are herein
incorporated by reference. Alternatively, polynucleotides can be
transiently transformed into the plant using techniques known in
the art. Such techniques include viral vector systems and the
precipitation of the polynucleotide in a manner that precludes
subsequent release of the DNA. Thus, the transcription from the
particle-bound DNA can occur, but the frequency with which it is
released to become integrated into the genome is greatly reduced.
Such methods include the use of particles coated with
polyethylimine (PEI; Sigma #P3143).
[0112] In other embodiments, the polynucleotide of the invention
may be introduced into plants by contacting plants with a virus or
viral nucleic acids. Generally, such methods involve incorporating
a nucleotide construct of the invention within a viral DNA or RNA
molecule. Further, it is recognized that promoters of the invention
also encompass promoters utilized for transcription by viral RNA
polymerases. Methods for introducing polynucleotides into plants
and expressing a protein encoded therein, involving viral DNA or
RNA molecules, are known in the art. See, for example, U.S. Pat.
Nos. 5,889,191, 5,889,190, 5,866,785, 5,589,367, 5,316,931, and
Porta et al. (1996) Molecular Biotechnology 5:209-221; herein
incorporated by reference.
[0113] Methods are known in the art for the targeted insertion of a
polynucleotide at a specific location in the plant genome. In one
embodiment, the insertion of the polynucleotide at a desired
genomic location is achieved using a site-specific recombination
system. See, for example, WO99/25821, WO99/25854, WO99/25840,
WO99/25855, and WO99/25853, all of which are herein incorporated by
reference. Briefly, the polynucleotide of the invention can be
contained in transfer cassette flanked by two non-recombinogenic
recombination sites. The transfer cassette is introduced into a
plant having stably incorporated into its genome a target site
which is flanked by two non-recombinogenic recombination sites that
correspond to the sites of the transfer cassette. An appropriate
recombinase is provided and the transfer cassette is integrated at
the target site. The polynucleotide of interest is thereby
integrated at a specific chromosomal position in the plant
genome.
[0114] The cells that have been transformed may be grown into
plants in accordance with conventional ways. See, for example,
McCormick et al. (1986) Plant Cell Reports 5:81-84. These plants
may then be grown, and either pollinated with the same transformed
strain or different strains, and the resulting progeny having
constitutive expression of the desired phenotypic characteristic
identified. Two or more generations may be grown to ensure that
expression of the desired phenotypic characteristic is stably
maintained and inherited and then seeds harvested to ensure
expression of the desired phenotypic characteristic has been
achieved. In this manner, the present invention provides
transformed seed (also referred to as "transgenic seed") having a
polynucleotide of the invention, for example, an expression
cassette of the invention, stably incorporated into their
genome.
[0115] As used herein, the term plant includes plant cells, plant
protoplasts, plant cell tissue cultures from which plants can be
regenerated, plant calli, plant clumps, and plant cells that are
intact in plants or parts of plants such as embryos, pollen,
ovules, seeds, leaves, flowers, branches, fruit, kernels, ears,
cobs, husks, stalks, roots, root tips, anthers, and the like. Grain
is intended to mean the mature seed produced by commercial growers
for purposes other than growing or reproducing the species.
Progeny, variants, and mutants of the regenerated plants are also
included within the scope of the invention, provided that these
parts comprise the introduced polynucleotides.
[0116] The present invention may be used for transformation of any
plant species, including, but not limited to, monocots and dicots.
Examples of plant species of interest include, but are not limited
to, corn (Zea mays), Brassica sp. (e.g., B. napus, B. rapa, B.
juncea), particularly those Brassica species useful as sources of
seed oil, alfalfa (Medicago sativa), rice (Oryza sativa), rye
(Secale cereale), sorghum (Sorghum bicolor, Sorghum vulgare),
millet (e.g., pearl millet (Pennisetum glaucum), proso millet
(Panicum miliaceum), foxtail millet (Setaria italica), finger
millet (Eleusine coracana)), sunflower (Helianthus annuus),
safflower (Carthamus tinctorius), wheat (Triticum aestivum),
soybean (Glycine max), tobacco (Nicotiana tabacum), potato (Solanum
tuberosum), peanuts (Arachis hypogaea), cotton (Gossypium
barbadense, Gossypium hirsutum), sweet potato (Ipomoea batatus),
cassava (Manihot esculenta), coffee (Coffea spp.), coconut (Cocos
nucifera), pineapple (Ananas comosus), citrus trees (Citrus spp.),
cocoa (Theobroma cacao), tea (Camellia sinensis), banana (Musa
spp.), avocado (Persea americana), fig (Ficus casica), guava
(Psidium guajava), mango (Mangifera indica), olive (Olea europaea),
papaya (Carica papaya), cashew (Anacardium occidentale), macadamia
(Macadamia integrifolia), almond (Prunus amygdalus), sugar beets
(Beta vulgaris), sugarcane (Saccharum spp.), oats, barley,
vegetables, ornamentals, and conifers.
[0117] Vegetables include tomatoes (Lycopersicon esculentum),
lettuce (e.g., Lactuca sativa), green beans (Phaseolus vulgaris),
lima beans (Phaseolus limensis), peas (Lathyrus spp.), and members
of the genus Cucumis such as cucumber (C. sativus), cantaloupe (C.
cantalupensis), and musk melon (C. melo). Ornamentals include
azalea (Rhododendron spp.), hydrangea (Macrophylla hydrangea),
hibiscus (Hibiscus rosasanensis), roses (Rosa spp.), tulips (Tulipa
spp.), daffodils (Narcissus spp.), petunias (Petunia hybrida),
carnation (Dianthus caryophyllus), poinsettia (Euphorbia
pulcherrima), and chrysanthemum.
[0118] Conifers that may be employed in practicing the present
invention include, for example, pines such as loblolly pine (Pinus
taeda), slash pine (Pinus elliotii), ponderosa pine (Pinus
ponderosa), lodgepole pine (Pinus contorta), and Monterey pine
(Pinus radiata); Douglas-fir (Pseudotsuga menziesii); Western
hemlock (Tsuga canadensis); Sitka spruce (Picea glauca); redwood
(Sequoia sempervirens); true firs such as silver fir (Abies
amabilis) and balsam fir (Abies balsamea); and cedars such as
Western red cedar (Thuja plicata) and Alaska yellow-cedar
(Chamaecyparis nootkatensis). In specific embodiments, plants of
the present invention are crop plants (for example, corn, alfalfa,
sunflower, Brassica, soybean, cotton, safflower, peanut, sorghum,
wheat, millet, tobacco, etc.). In other embodiments, corn and
soybean plants and sugarcane plants are optimal, and in yet other
embodiments corn plants are optimal.
[0119] Other plants of interest include grain plants that provide
seeds of interest, oil-seed plants, and leguminous plants. Seeds of
interest include grain seeds, such as corn, wheat, barley, rice,
sorghum, rye, etc. Oil-seed plants include cotton, soybean,
safflower, sunflower, Brassica, maize, alfalfa, palm, coconut, etc.
Leguminous plants include beans and peas. Beans include guar,
locust bean, fenugreek, soybean, garden beans, cowpea, mungbean,
lima bean, fava bean, lentils, chickpea, etc.
VIII. Methods of Use
[0120] Methods of the invention comprise methods for controlling a
pest (i.e., a Coleopteran plant pest, including a Diabrotica plant
pest, such as, D. virgifera virgifera, D. barberi, D. virgifera
zeae, D. speciosa, or D. undecimpunctata howardi). The method
comprises feeding or applying to a pest a composition comprising a
silencing element of the invention, wherein said silencing element,
when ingested or contacted by a pest (i.e., a Coleopteran plant
pest including a Diabrotica plant pest, such as, D. virgifera
virgifera, D. barberi, D. virgifera zeae, D. speciosa, or D.
undecimpunctata howardi), reduces the level of a target
polynucleotide of the pest and thereby controls the pest. The pest
can be fed the silencing element in a variety of ways. For example,
in one embodiment, the polynucleotide comprising the silencing
element is introduced into a plant. As the Coleopteran plant pest
or Diabrotica plant pest feeds on the plant or part thereof
expressing these sequences, the silencing element is delivered to
the pest. When the silencing element is delivered to the plant in
this manner, it is recognized that the silencing element can be
expressed constitutively or alternatively, it may be produced in a
stage-specific manner by employing the various inducible or
tissue-preferred or developmentally regulated promoters that are
discussed elsewhere herein. In specific embodiments, the silencing
element is expressed in the roots, stalk or stem, leaf including
pedicel, xylem and phloem, fruit or reproductive tissue, silk,
flowers and all parts therein or any combination thereof.
[0121] In another method, a composition comprising at least one
silencing element of the invention is applied to a plant. In such
embodiments, the silencing element can be formulated in an
agronomically suitable and/or environmentally acceptable carrier,
which is preferably, suitable for dispersal in fields. In addition,
the carrier can also include compounds that increase the half life
of the composition. In specific embodiments, the composition
comprising the silencing element is formulated in such a manner
such that it persists in the environment for a length of time
sufficient to allow it to be delivered to a pest. In such
embodiments, the composition can be applied to an area inhabited by
a pest. In one embodiment, the composition is applied externally to
a plant (i.e., by spraying a field) to protect the plant from
pests.
[0122] In certain embodiments, the constructs of the present
invention can be stacked with any combination of polynucleotide
sequences of interest in order to create plants with a desired
trait. A trait, as used herein, refers to the phenotype derived
from a particular sequence or groups of sequences. For example, the
polynucleotides of the present invention may be stacked with any
other polynucleotides encoding polypeptides having pesticidal
and/or insecticidal activity, such as other Bacillus thuringiensis
toxic proteins (described in U.S. Pat. Nos. 5,366,892; 5,747,450;
5,737,514; 5,723,756; 5,593,881; and Geiser et al. (1986) Gene
48:109), lectins (Van Damme et al. (1994) Plant Mol. Biol. 24:825,
pentin (described in U.S. Pat. No. 5,981,722), and the like. The
combinations generated can also include multiple copies of any one
of the polynucleotides of interest. The polynucleotides of the
present invention can also be stacked with any other gene or
combination of genes to produce plants with a variety of desired
trait combinations including, but not limited to, traits desirable
for animal feed such as high oil genes (e.g., U.S. Pat. No.
6,232,529); balanced amino acids (e.g., hordothionins (U.S. Pat.
Nos. 5,990,389; 5,885,801; 5,885,802; and 5,703,409); barley high
lysine (Williamson et al. (1987) Eur. J. Biochem. 165:99-106; and
WO 98/20122) and high methionine proteins (Pedersen et al. (1986)
J. Biol. Chem. 261:6279; Kirihara et al. (1988) Gene 71:359; and
Musumura et al. (1989) Plant Mol. Biol. 12:123)); increased
digestibility (e.g., modified storage proteins (U.S. application
Ser. No. 10/053,410, filed Nov. 7, 2001); and thioredoxins (U.S.
application Ser. No. 10/005,429, filed Dec. 3, 2001)); the
disclosures of which are herein incorporated by reference.
[0123] The polynucleotides of the present invention can also be
stacked with traits desirable for disease or herbicide resistance
(e.g., fumonisin detoxification genes (U.S. Pat. No. 5,792,931);
avirulence and disease resistance genes (Jones et al. (1994)
Science 266:789; Martin et al. (1993) Science 262:1432; Mindrinos
et al. (1994) Cell 78:1089); acetolactate synthase (ALS) mutants
that lead to herbicide resistance such as the S4 and/or Hra
mutations; inhibitors of glutamine synthase such as
phosphinothricin or basta (e.g., bar gene); and glyphosate
resistance (EPSPS gene)); and traits desirable for processing or
process products such as high oil (e.g., U.S. Pat. No. 6,232,529);
modified oils (e.g., fatty acid desaturase genes (U.S. Pat. No.
5,952,544; WO 94/11516)); modified starches (e.g., ADPG
pyrophosphorylases (AGPase), starch synthases (SS), starch
branching enzymes (SBE), and starch debranching enzymes (SDBE));
and polymers or bioplastics (e.g., U.S. Pat. No. 5,602,321;
beta-ketothiolase, polyhydroxybutyrate synthase, and
acetoacetyl-CoA reductase (Schubert et al. (1988) J. Bacteriol.
170:5837-5847) facilitate expression of polyhydroxyalkanoates
(PHAs)); the disclosures of which are herein incorporated by
reference. One could also combine the polynucleotides of the
present invention with polynucleotides providing agronomic traits
such as male sterility (e.g., see U.S. Pat. No. 5,583,210), stalk
strength, drought resistance (e.g., U.S. Pat. No. 7,786,353),
flowering time, or transformation technology traits such as cell
cycle regulation or gene targeting (e.g., WO 99/61619, WO 00/17364,
and WO 99/25821); the disclosures of which are herein incorporated
by reference.
[0124] These stacked combinations can be created by any method
including, but not limited to, cross-breeding plants by any
conventional or TopCross methodology, or genetic transformation. If
the sequences are stacked by genetically transforming the plants
(i.e., molecular stacks), the polynucleotide sequences of interest
can be combined at any time and in any order. For example, a
transgenic plant comprising one or more desired traits can be used
as the target to introduce further traits by subsequent
transformation. The traits can be introduced simultaneously in a
co-transformation protocol with the polynucleotides of interest
provided by any combination of transformation cassettes. For
example, if two sequences will be introduced, the two sequences can
be contained in separate transformation cassettes (trans) or
contained on the same transformation cassette (cis). Expression of
the sequences can be driven by the same promoter or by different
promoters. In certain cases, it may be desirable to introduce a
transformation cassette that will suppress the expression of the
polynucleotide of interest. This may be combined with any
combination of other suppression cassettes or overexpression
cassettes to generate the desired combination of traits in the
plant. It is further recognized that polynucleotide sequences can
be stacked at a desired genomic location using a site-specific
recombination system. See, for example, WO99/25821, WO99/25854,
WO99/25840, WO99/25855, and WO99/25853, all of which are herein
incorporated by reference.
[0125] The following examples are offered by way of illustration
and not by way of limitation.
EXPERIMENTAL
Example 1: In Vitro Transcript dsRNA Screening Method
[0126] A cDNA library was produced from neonate western corn
rootworm larvae by standard methods. A selected cDNA clone
containing an expressed sequence tag was amplified in a PCR using
universal primers to the plasmid backbone and flanking the EST
insert. The universal primers also contained T7 RNA polymerase
sites. Product of the PCR reaction was used as the template for an
in vitro transcription (IVT) reaction to produce long double
stranded RNAs. Following enzymatic digestion and removal of the DNA
template and single stranded RNA, the IVT reaction products were
incorporated into artificial insect diet as described below.
[0127] Different target selection strategies were used in this
invention to identify RNAi active targets with insecticidal
activities in corn rootworn diet based assay. cDNA libraries were
produced from neonate or midgut of 3rd instar western corn rootworm
larvae by standard methods. Randomly selected cDNA clones
containing an expressed sequence tag (EST) were amplified in a PCR
using target specific primers (forward and reverse Table 1), and
provided in the sequence listing included herein, to generate DNA
templates. The target specific primers also contain T7 RNA
polymerase sites (T7 sequence at 5' end of each primer). Second set
of cDNA clones was selected based on homology to known lethal genes
from other insects, primarily Drosophila melanogaster. A third set
of genes was tested based on involvement in proteosome functions.
Identification of these genes was based on a progressive homology
search beginning with a list of proteosome genes identified in
humans cross referenced to the Tribolium genome database. Hits from
Tribolium were then used to parse western corn rootworm sequence
database. Proteosome genes were categorized as 26S subunit non
ATPase, 26S subunit ATPase, alpha type, and beta type genes.
[0128] Region(s) of WCRW genes were produced by PCR followed by in
vitro transcription (IVT) to produce long double stranded RNAs. The
IVT reaction products are quantified in gel and incorporated into
artificial insect diet for first-round IVT screening (FIS) as
described below.
Insect Bioassays
[0129] dsRNAs were incorporated into standard WCRW artificial diet
at a final concentration of 50 ppm in a 96 well microtiter plate
format. 5 .mu.l of the IVT reaction (300 ng/ul) were added to a
given well of a 96 well microtiter plate. 25 .mu.l of molten
lowmelt Western corn rootworm diet were added to the sample and
shaken on an orbital shaker to mix the sample and diet. Once the
diet has solidified, eight wells were used for each RNA sample.
Preconditioned 1.sup.st instar WCRW (neonate insects were placed on
neutral diet for 24 hours prior to transfer to test material) were
added to the 96 well microtiter plates at a rate of 3-5
insects/well. Plates were sealed with mylar which was then
punctured twice above each well of the microtiter plate using a
superfine insect collection pin. To prevent drying of the diet,
plates were first placed inside a plastic bag with a slightly damp
cloth and the bags were placed inside an incubator set at 28 C and
70RH. The assay was scored for mortality and stunting affects after
7 days and an average was determined based on assignment of numeric
values to each category of impact (3=mortality, 2=severe stunting,
1=stunting, 0=no affect). The number reported in this and all diet
assay tables reflect the average score across all observations. A
score of 3 represents complete mortality across all observations. A
score of 2.5 would indicate half the wells demonstrating mortality
and half scored as severe stunting. The assay results can be found
in Table 1A.
[0130] DNA sequences which encode double stranded RNAs which were
shown to have insecticidal activity (average score above 1.5)
against corn rootworms using the assay described in Example 1 are
listed in Table 1. To identify full length of cDNA or full
open-reading frame of RNAi active target gene, full insert
sequencing for EST clones and transcriptome analyses of midgut RNA
samples were conducted. Sequences of all target transcripts
containing full length cDNA or longer transcripts were also listed
in Table 1. Some of these sequences were used for RNAi active
fragment search.
Example 2. Sequences Having Insecticidal Activity
[0131] DNA sequences which encode double stranded RNAs which were
shown to have insecticidal activity against corn rootworms using
the assay described in Example 1 are set forth below. Non-limiting
examples of target polynucleotides are set forth below in Table 1A
and B, and SEQ ID NOS: 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24,
25, 28, 29, 32, 33, 36, 37, 40, 41, 44, 45, 48, 49, 52, 53, 54, 55,
56, 57, 60, 61, 64, 65, 68, 69, 72, 73, 76, 77, 80, 81, 84, 85, 88,
89, 92, 93, 96, 97, 100, 101, 104, 105, 108, 109, 112, 113, 116,
117, 120, 121, 124, 125, 128, 129, 132, 133, 136, 137, 140, 141,
144, 145, 148, 149, 152, 153, 156, 157, 160, 161, 164, 165, 168,
169, 172, 173, 176, 177, 180, 181, 184, 185, 188, 189, 192, 193,
196, 197, 200, 201, 204, 205, 208, 209, 212, 213, 216, 217, 220,
221, 224, 225, 228, 229, 232, 233, 236, 237, 240, 241, 244, 245,
248, 249, 252, 253, 256, 257, 260, 261, 264, 265, 268, 269, 272,
273, 276, 277, 280, 281, 284, 285, 288, 289, 292, 293, 296, 297,
300, 301, 304, 305, 308, 309, 312, 313, 316, 317, 320, 321, 324,
325, 328, 329, 332, 333, 336, 337, 340, 341, 344, 345, 348, 349,
352, 353, 356, 357, 360, 361, 364, 365, 368, 369, 372, 373, 376,
377, 380, 381, 384, 385, 388, 389, 392, 393, 396, 397, 400, 401,
404, 405, 408, 409, 412, 413, 416, 417, 420, 421, 424, 425, 428,
429, 432, 433, 436, 437, 440, 441, 444, 445, 448, 449, 452, 453,
456, 457, 460, 461, 464, 465, 468, 469, 472, 473, 476, 477, 480,
481, 484, 485, 488, 489, 492, 493, 496, 497, 500, 501, 504, 505,
508, 509, 512, 513, 516, 517, 520, 521, 524, 525, 528, 529, 532,
533, 536, 537, 540, 541, 544, 545, 548, 549, 552, 553, 556, 557,
560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572,
573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585,
586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598,
599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611,
612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624,
625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637,
638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650,
651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663,
664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676,
677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689,
690, 691, 692, 693, 694, 695, 696, 697, 700, 701, 702, 703, 706,
707, 708, 709, 712, 713, 714, 715, 718, 719, 720, 721, or active
variants and fragments thereof, and complements thereof, including,
for example, SEQ ID NOS: 1, 9, 37, 45, 49, 61, 65, 77, 101, 113,
137, 141, 145, 149, 153, 157, 169, 173, 181, 185, 189, 205, 217,
225, 233, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571,
572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584,
585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597,
598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610,
611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623,
624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636,
637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649,
650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662,
663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675,
676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688,
689, 690, 691, 692, and active variants and fragments thereof, and
complements thereof, and SEQ ID NOS: 4, 140, 144, 148, 693, 694,
695, 696, 697, 700, 701, 702, 703, 706, 707, 708, 709, 712, 713,
714, 715, 718, 719, 720, 721 and active variants and fragments
thereof, and complements thereof.
[0132] Subregions of efficacious dsRNAs were designed to improve
insecticidal activities in diet and dsRNA expression in planta.
These fragments were assayed in the same manner as the original FIS
assays described above. Regions demonstrating a severe impact on
larval phenotype (mortality or severe growth retardation) were
advanced to informal inhibitory concentration (IC50) assays. IC50
assays used doses starting at 50 ppm and progressing downward by
1/2 step dilutions through 25, 12.5, 6, 3, 1.5, and 0.75 pppm. 12
observations were included for each rate. Assay methods were the
same as described above for primary screens. Calculations of
inhibition relied on scoring for both mortality and severe
stunting
Selected fragments were advanced to formal dose response assays
where both LC50 and IC50 values were calculated and described in
Table 2 (Seq No. 561 to 692). These assays included an initial
range finding assay followed by dose response assays for selected
ranges including 3 replications of the experiment. Fragments with
confirmed IC50 values below 2 ppm were advanced to plant
transformation vector construction.
[0133] The proteosome alpha subunit type 3 (PAT3) target gene was
used as a model for gene and construct optimization. As a first
step, the gene was divided into 1/3, 1/6, and 1/12 size fragments
(f). In addition, f11-13 represent spanning segments over the
boundaries of the first four 1/6th fragments. FIG. 5 provides a
diagram of the fragments of PAT3.
[0134] Plant preferred fragments were identified from active RNAi
gene targets and tested in dsRNA artificial diet assays. Selection
of these plant preferred regions was based on avoiding
destabilizing elements and motifs, or regions with unsuitable base
composition. Homology assessments were also employed to avoid
potential non target organisms. Finally, fragments with a size
range of 150-250 bp were preferred. All rules were considered in
selecting fragments but fragments were not excluded from
consideration based on any one rule. The table 2 includes data for
initial FIS samples and subsequent fragments insecticidal assay.
Selected samples were advanced to IC50 and LC50 determinations.
Example 3. Identify RNAi Active Targets from Other Insects
[0135] To identify RNAi active genes from other important corn
pests or no-target insects, transcriptome experiments were
completed using 3.sup.rd instar larvae from Northern corn rootworm
(Diabrotica barberi), Southern corn rootworm (Diabrotica
undecimpunctata), Mexican Bean Beetle (Epilachna varivestis),
Colorado potato beetle (Leptinotarsa decemlineata), Insidious
flower bug (Orius insidiosus) and Spotted Lady Beetle (Coleomegilla
maculata, [CMAC]). Homologous transcripts of RNAi active leads were
listed in Table 3 (Seq No.693 to 723). This sequence data is
important for designing fragments to suppress target pest genes and
avoid knockdown same gene in no target insects.
Example 4. Insecticidal RNA Targets in WCRW Midgut
[0136] Two RNAi active targets Ryanr and HP2 (Table 1 and Table 2)
were identified through random cDNA FIS screening. Ryanr was
identified in a previous FIS screening (US 2011/0054007A1).
Fragments of these targets showed very strong insecticidal
activities. Homologous searches reveal that Ryanr and HP2 showed
54% and 49% identity to Drosophila Ssk and Mesh, respectively. The
Mesh-Ssk protein complex is required for septate junction formation
in the Drosophila midgut. See the amino acid sequence alignment of
WCRW Ryanr and Drosophila Ssk in FIG. 4.
Example 5. Transformation of Maize
[0137] Immature maize embryos from greenhouse donor plants are
bombarded with a plasmid containing the silencing element of the
invention operably linked to either a tissue specific, tissue
selective, or constitutive promoter and the selectable marker gene
PAT (Wohlleben et al. (1988) Gene 70:25-37), which confers
resistance to the herbicide Bialaphos. In one embodiment, the
constructs will express a long double stranded RNA of the target
sequence set forth in table 1. Such a construct can be linked to
the dMMB promoter. Alternatively, the selectable marker gene is
provided on a separate plasmid. Transformation is performed as
follows. Media recipes follow below.
Preparation of Target Tissue
[0138] The ears are husked and surface sterilized in 30% Clorox
bleach plus 0.5% Micro detergent for 20 minutes, and rinsed two
times with sterile water. The immature embryos are excised and
placed embryo axis side down (scutellum side up), 25 embryos per
plate, on 560Y medium for 4 hours and then aligned within the 2.5
cm target zone in preparation for bombardment.
[0139] A plasmid vector comprising the silencing element of
interest operably linked to either the tissue specific, tissue
selective, or constitutive promoter is made. This plasmid DNA plus
plasmid DNA containing a PAT selectable marker is precipitated onto
1.1 .mu.m (average diameter) tungsten pellets using a CaCl.sub.2
precipitation procedure as follows: 100 .mu.l prepared tungsten
particles in water; 10 .mu.l (1 .mu.g) DNA in Tris EDTA buffer (1
.mu.g total DNA); 100 .mu.l 2.5 M CaCl.sub.2; and, 10 .mu.l 0.1 M
spermidine.
[0140] Each reagent is added sequentially to the tungsten particle
suspension, while maintained on the multitube vortexer. The final
mixture is sonicated briefly and allowed to incubate under constant
vortexing for 10 minutes. After the precipitation period, the tubes
are centrifuged briefly, liquid removed, washed with 500 ml 100%
ethanol, and centrifuged for 30 seconds. Again the liquid is
removed, and 105 .mu.l 100% ethanol is added to the final tungsten
particle pellet. For particle gun bombardment, the tungsten/DNA
particles are briefly sonicated and 10 .mu.l spotted onto the
center of each macrocarrier and allowed to dry about 2 minutes
before bombardment.
[0141] The sample plates are bombarded at level #4 in a particle
gun. All samples receive a single shot at 650 PSI, with a total of
ten aliquots taken from each tube of prepared particles/DNA.
[0142] Following bombardment, the embryos are kept on 560Y medium
for 2 days, then transferred to 560R selection medium containing 3
mg/liter Bialaphos, and subcultured every 2 weeks. After
approximately 10 weeks of selection, selection-resistant callus
clones are transferred to 288J medium to initiate plant
regeneration. Following somatic embryo maturation (2-4 weeks),
well-developed somatic embryos are transferred to medium for
germination and transferred to the lighted culture room.
Approximately 7-10 days later, developing plantlets are transferred
to 272V hormone-free medium in tubes for 7-10 days until plantlets
are well established. Plants are then transferred to inserts in
flats (equivalent to 2.5'' pot) containing potting soil and grown
for 1 week in a growth chamber, subsequently grown an additional
1-2 weeks in the greenhouse, then transferred to classic 600 pots
(1.6 gallon) and grown to maturity.
[0143] Plants are monitored and scored for the appropriate marker,
such as the control of a Coleoptera plant pest, such as a
Diabrotica plant pest and have insecticidal activity. For example,
Ro plant roots are fed to western corn rootworm larvae (WCR,
Diabrotica virgifera). Transgenic corn roots are handed-off in
Petri dishes with MSOD medium containing antibiotics and glyphosate
for in vitro selection. Two WCR larvae are infested per root in
each dish with a fine tip paintbrush. The dishes are sealed with
Parafilm to prevent the larvae from escaping. The assays are placed
into a 27.degree. C., 60% RH Percival incubator incomplete
darkness. Contamination and larval quality are monitored. After six
days of feeding on root tissue, the larvae are transferred to WCR
diet in a 96 well plate. The larvae are allowed to feed on the diet
for eight days making the full assay fourteen days long. Larval
mass and survivorship are recorded for analysis. A one-way ANOVA
analysis and a Dunnett's test is performed on the larval mass data
to look for statistical significance compared to an untransformed
negative control. WCR larvae stunting is measured after feeding on
two events and compared to growth of larvae fed on negative control
plants.
[0144] in other assays, transgenic corn plants (Ro) generated are
planted into 10-inch pots containing Metromix soil after reaching
an appropriate size. When plants reach the V4 growth stage,
approximately 1000 Western corn rootworm (WCR, Diabrotica
virgifera) eggs are infested into the root zone. Non-transgenic
corn of the same genotype is infested at a similar growth stage to
serve as a negative control. Eggs are pre-incubated so hatch occurs
within 24 hours of infestation. Larvae are allowed to feed on the
root systems for 3 weeks. Plants are removed from the soil and
washed so that the roots can be evaluated for larval feeding. Root
damage is rated using a Node Injury Scale (NIS) to score the level
of damage where a 0 indicates no damage, a 1 indicates that one
node of roots is pruned to within 1.5 inches. a 2 indicates that 2
nodes are pruned, while a 3 indicates that 3 nodes are pruned.
Because the plants being used for evaluation are directly out of
tissue culture after transformation and because transformation
events are unique, only a single plant is evaluated per event at
this time. The plants in the assay that present signs or symptoms
of larval feeding indicate that a successful infestation is
obtained. Negative control plant roots are moderately to severely
damaged averaging whereas roots of the transgenic plants provide
substantial control of larval feeding, with about 0.2 or less on
the Node Injury Scale.
[0145] Bombardment medium (560Y) comprises 4.0 g/l N6 basal salts
(SIGMA C-1416), 1.0 ml/l Eriksson's Vitamin Mix (1000.times.
SIGMA-1511), 0.5 mg/l thiamine HCl, 120.0 g/l sucrose, 1.0 mg/l
2,4-D, and 2.88 g/l L-proline (brought to volume with D-I H.sub.2O
following adjustment to pH 5.8 with KOH); 2.0 g/l Gelrite (added
after bringing to volume with D-I H.sub.2O); and 8.5 mg/l silver
nitrate (added after sterilizing the medium and cooling to room
temperature). Selection medium (560R) comprises 4.0 g/l N6 basal
salts (SIGMA C-1416), 1.0 ml/1 Eriksson's Vitamin Mix (1000.times.
SIGMA-1511), 0.5 mg/l thiamine HCl, 30.0 g/l sucrose, and 2.0 mg/l
2,4-D (brought to volume with D-I H.sub.2O following adjustment to
pH 5.8 with KOH); 3.0 g/l Gelrite (added after bringing to volume
with D-I H.sub.2O); and 0.85 mg/l silver nitrate and 3.0 mg/l
bialaphos (both added after sterilizing the medium and cooling to
room temperature).
[0146] Plant regeneration medium (288J) comprises 4.3 g/l MS salts
(GIBCO 11117-074), 5.0 ml/1 MS vitamins stock solution (0.100 g
nicotinic acid, 0.02 g/l thiamine HCl, 0.10 g/l pyridoxine HCl, and
0.40 g/l glycine brought to volume with polished D-I H.sub.2O)
(Murashige and Skoog (1962) Physiol. Plant. 15:473), 100 mg/l
myo-inositol, 0.5 mg/l zeatin, 60 g/l sucrose, and 1.0 ml/1 of 0.1
mM abscisic acid (brought to volume with polished D-I H.sub.2O
after adjusting to pH 5.6); 3.0 g/l Gelrite (added after bringing
to volume with D-I H.sub.2O); and 1.0 mg/l indoleacetic acid and
3.0 mg/l bialaphos (added after sterilizing the medium and cooling
to 60.degree. C.). Hormone-free medium (272V) comprises 4.3 g/l MS
salts (GIBCO 11117-074), 5.0 ml/1 MS vitamins stock solution (0.100
g/l nicotinic acid, 0.02 g/l thiamine HCl, 0.10 g/l pyridoxine HCl,
and 0.40 g/l glycine brought to volume with polished D-I H.sub.2O),
0.1 g/l myo-inositol, and 40.0 g/l sucrose (brought to volume with
polished D-I H.sub.2O after adjusting pH to 5.6); and 6 g/l
bacto-agar (added after bringing to volume with polished D-I
H.sub.2O), sterilized and cooled to 60.degree. C.
Example 6. Agrobacterium-Mediated Transformation of Maize
[0147] For Agrobacterium-mediated transformation of maize with a
silencing element of the invention, the method of Zhao is employed
(U.S. Pat. No. 5,981,840, and PCT patent publication WO98/32326;
the contents of which are hereby incorporated by reference). Such a
construct can, for example, express a long double stranded RNA of
the target sequence set forth in table 1. Such a construct can be
linked to the dMMB promoter. Briefly, immature embryos are isolated
from maize and the embryos contacted with a suspension of
Agrobacterium, where the bacteria are capable of transferring the
polynucleotide comprising the silencing element to at least one
cell of at least one of the immature embryos (step 1: the infection
step). In this step the immature embryos are immersed in an
Agrobacterium suspension for the initiation of inoculation. The
embryos are co-cultured for a time with the Agrobacterium (step 2:
the co-cultivation step). The immature embryos are cultured on
solid medium following the infection step. Following this
co-cultivation period an optional "resting" step is contemplated.
In this resting step, the embryos are incubated in the presence of
at least one antibiotic known to inhibit the growth of
Agrobacterium without the addition of a selective agent for plant
transformants (step 3: resting step). The immature embryos are
cultured on solid medium with antibiotic, but without a selecting
agent, for elimination of Agrobacterium and for a resting phase for
the infected cells. Next, inoculated embryos are cultured on medium
containing a selective agent and growing transformed callus is
recovered (step 4: the selection step). The immature embryos are
cultured on solid medium with a selective agent resulting in the
selective growth of transformed cells. The callus is then
regenerated into plants (step 5: the regeneration step), and calli
grown on selective medium are cultured on solid medium to
regenerate the plants. Assays for insecticidal activity can be
performed as described above in Example, 5.
Example 7 Expression of Silencing Elements in Maize
[0148] The silencing elements are expressed in a maize plant as
hairpins and the plant is tested for insecticidal activity against
corn root worms.
[0149] Maize plants are transformed with Plasmids containing at
least one polynucleotide disclosed herein and plants expressing the
silencing elements are transplanted from 272V plates into
greenhouse flats containing Fafard Superfine potting mix.
Approximately 10 to 14 days after transplant, plants (now at growth
stage V2-V3) are transplanted into treepots containing Fafard
Superfine potting mix. At 14 days post greenhouse send date, plants
are infested with 100 eggs of western corn root worms (WCRW)/plant.
For later sets, a second infestation of 100 eggs WCRW/plant is done
14 days after the first infestation and scoring is at 14 days after
the second infestation. 21 days post infestation, plants are scored
using CRWNIS. Those plants with a score of <0.5 are transplanted
into large pots containing SB300 for seed.
[0150] The sequences referred to herein, SEQ. ID NOs: 1-723 are
filed concurrently herewith in a textfile and are incorporated
herein in their entirities.
[0151] As used herein the singular forms "a", "and", and "the"
include plural referents unless the context clearly dictates
otherwise. Thus, for example, reference to "a cell" includes a
plurality of such cells and reference to "the protein" includes
reference to one or more proteins and equivalents thereof known to
those skilled in the art, and so forth. All technical and
scientific terms used herein have the same meaning as commonly
understood to one of ordinary skill in the art to which this
invention belongs unless clearly indicated otherwise.
[0152] All publications and patent applications mentioned in the
specification are indicative of the level of those skilled in the
art to which this invention pertains. All publications and patent
applications are herein incorporated by reference to the same
extent as if each individual publication or patent application was
specifically and individually indicated to be incorporated by
reference.
[0153] Although the foregoing invention has been described in some
detail by way of illustration and example for purposes of clarity
of understanding, certain changes and modifications may be
practiced within the scope of the appended claims.
Sequence CWU 0 SQTB SEQUENCE LISTING The patent application
contains a lengthy "Sequence Listing" section. A copy of the
"Sequence Listing" is available in electronic form from the USPTO
web site
(http://seqdata.uspto.gov/?pageRequest=docDetail&DocID=US20170355991A1).
An electronic copy of the "Sequence Listing" will also be available
from the USPTO upon request and payment of the fee set forth in 37
CFR 1.19(b)(3).
0 SQTB SEQUENCE LISTING The patent application contains a lengthy
"Sequence Listing" section. A copy of the "Sequence Listing" is
available in electronic form from the USPTO web site
(http://seqdata.uspto.gov/?pageRequest=docDetail&DocID=US20170355991A1).
An electronic copy of the "Sequence Listing" will also be available
from the USPTO upon request and payment of the fee set forth in 37
CFR 1.19(b)(3).
* * * * *
References