U.S. patent number PP26,735 [Application Number 13/999,592] was granted by the patent office on 2016-05-17 for sweetpotato plant named `la06-52`.
This patent grant is currently assigned to Board of Supervisors of Louisiana State University and Agricultural and Mechanical College Through The LSU AgCenter. The grantee listed for this patent is Board of Supervisors of Louisiana State University and Agricultural and Mechanical College Through The LSU AgCenter. Invention is credited to Christopher A. Clark, Don R. Labonte, Tara P. Smith, Arthur Q. Villordon.
United States Patent |
PP26,735 |
Labonte , et al. |
May 17, 2016 |
Sweetpotato plant named `LA06-52`
Abstract
A new variety of sweetpotato identified as `LA06-52` is
disclosed having disease resistance to Fusarium wilt, Rhizopus soft
rot (intermediate), southern root-knot nematode, and Streptomyces
soil rot, an orange flesh, copper skin and high yield
characteristics.
Inventors: |
Labonte; Don R. (Baton Rouge,
LA), Villordon; Arthur Q. (Monroe, LA), Smith; Tara
P. (Chase, LA), Clark; Christopher A. (Baton Rouge,
LA) |
Applicant: |
Name |
City |
State |
Country |
Type |
Board of Supervisors of Louisiana State University and Agricultural
and Mechanical College Through The LSU AgCenter |
Baton Rouge |
LA |
US |
|
|
Assignee: |
Board of Supervisors of Louisiana
State University and Agricultural and Mechanical College Through
The LSU AgCenter (Baton Rouge, LA)
|
Family
ID: |
54070617 |
Appl.
No.: |
13/999,592 |
Filed: |
March 11, 2014 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20150264851 P1 |
Sep 17, 2015 |
|
Current U.S.
Class: |
PLT/258 |
Current CPC
Class: |
A01H
5/06 (20130101) |
Current International
Class: |
A01H
5/06 (20060101) |
Field of
Search: |
;PLT/258 |
Primary Examiner: McCormick Ewoldt; Susan
Assistant Examiner: Redden; Karen
Attorney, Agent or Firm: Carver; James C.
Claims
We claim:
1. A new and distinct variety of Ipomoea batatas plant named
`LA06-52` as described and illustrated in the specification herein.
Description
Latin name: Ipomoea batatas.
Varietal denomination: `LA06-52`.
This invention pertains to a new and distinct variety of
sweetpotato.
BACKGROUND OF THE INVENTION
Sweetpotatoes, unlike Irish potatoes (Solanum tuberosum), are not
tuber propagated plants. A "tuber" is a short, thickened portion of
an underground branch. Along a tuber "eyes" are found, each of
which comprises a ridge bearing a scale-like leaf (analogous to a
branch leaf) having minute meristematic buds in the axial of the
leaf. By contrast, sweetpotato roots are developmentally and
anatomically true roots, lacking meristematic buds, and are not
derived from an underground branch. Sweetpotatoes do not form
tubers.
SUMMARY OF THE INVENTION
Genus and Species Name
This new and distinct sweetpotato variety, Ipomoea batatas (L.)
Lam., demonstrates superior disease resistance to southern
root-knot nematode and exhibits an orange flesh. It also
demonstrates a copper skin in comparison to light to medium rose
skinned `Beauregard`.
Variety Denomination
This new and distinct sweetpotato variety is identified as
`LA06-52`, and is characterized by an orange flesh, high yield,
consistent shape, and a copper skin.
BRIEF DESCRIPTION OF THE DRAWINGS
The file of this patent contains at least one photograph executed
in color. Copies of this patent or patent application with color
drawing(s) will be provided by the Patent and Trademark Office upon
request and payment of the necessary fee.
FIG. 1 is a color photograph of the fleshy root form of the novel
variety of sweetpotato identified as `LA06-52`.
FIG. 2 is a color photograph of the fleshy root form of the
sweetpotato variety identified as `Beauregard`.
FIG. 3 is a color photograph of the canopy biomasses of the variety
of sweetpotato identified as `Beauregard` (shown on the right side
of the photograph) and the novel variety identified as `LA06-52`
(shown on the left side of the photograph).
DETAILED BOTANICAL DESCRIPTION
This new variety of sweetpotato, named `LA06-52`, resulted from an
open pollinated cross performed in 2005 to the female parent
`82-529` (not patented). The male parent was unknown. Four patented
male parents (`L96-117` patented U.S. Plant Pat. No. 15,038 P2;
`Bienville` patented U.S. Plant Pat. No. 15,380 P3; `Evangeline`
patented U.S. Plant Pat. No. 19,710 P3, and `Murasaki-29` patented
U.S. Plant Pat. No. 19,955 P2) were among the potential pollen
sources in the crossing nursery. `LA06-52` was developed to provide
a variety with characteristics similar to `Beauregard`
(unpatented), but with a copper skin and southern root-knot
nematode resistance. None of the potential patented pollen sources
have a copper skin.
Plants of `LA06-52` and `Beauregard` can be differentiated.
`LA06-52` immature leaves are dark purple [10 P (purple) (2/4)]
which extend from the apex to leaves on the 7.sup.th node.
`Beauregard` infrequently has dark purple immature leaves and never
extending to the 7.sup.th node. Color terminology used herein is in
accordance with the Munsell.RTM. Book of Color (Munsell Color,
GretagMacbeth LLC, 617 Little Britain Road, New Windsor, N.Y.
12553-6148, published August 2003). The color descriptions and
color illustrations are as nearly true as is reasonably possible.
However, it is understood that both color and other phenotypic
expressions described herein may vary from plant to plant with
differences in growth, environment and cultural conditions, without
any change in the genotype of the variety `LA06-52`.
`LA06-52` roots were stored during the winter at Chase, La.
`LA06-52` was planted the following spring, resulting in
approximately 8-10 sprouts per root. Cuttings from the sprouts were
transplanted successfully for asexual reproduction. Asexual
propagation of the new cultivar by cuttings has shown that the
unique features of this new sweetpotato were stable and that the
plant reproduced true to type in successive generations of asexual
propagation. Plants described herein were 90 days in age from
planting in full sun field plantings.
FIG. 1 depicts the fleshy root form of the `LA06-52` sweetpotato.
The skin is a light copper and differs from the light to medium
rose `Beauregard`, both at harvest and after several months of
storage as shown in Table 1. Munsell.RTM. Book of Color values for
skin and flesh for both `LA06-52` and `Beauregard` storage roots
after 6 months of storage are shown in Table 1. The `Beauregard`
sweetpotato is depicted in FIG. 2. The skin for both `LA06-52` and
`Beauregard` was smooth. `LA06-52` storage roots were elliptical
without lobing, and tend to be shorter than `Beauregard` in varied
soil types. Nodal eyes are not present in sweetpotato as they are a
Solanum potato; lateral root scars are seldom present. `LA06-52`
has a smooth skin with few indentations. The `LA06-52` cortex was 5
mm in depth and the color similar throughout. The flesh of
`LA06-52` is orange in comparison to the lighter flesh of
`Beauregard`.
TABLE-US-00001 TABLE 1 Variable Variety Color Skin `LA06-52` 5 Y
(yellow) R (red) 7/4 `Beauregard` 10 R (red) 6/6 Flesh `LA06-52` 5
Y (yellow) R (red) 7/10 `Beauregard` 2.5 Y (yellow) R (red) 7/8
FIG. 3 depicts the canopy biomass of both `LA06-52` sweetpotatoes
and `Beauregard` sweetpotatoes. `LA06-52` has round, green-stemmed
vines which change [2.5 G (green) Y (yellow) (5/6)] from the apex
to purple [2.5 R (red) P (purple) 2/8] 30-40 cm from the apex and
extends to the crown of the roots. The first 4 cm of the stem from
the apex is weakly pubescent before becoming glabrous. The
`LA06-52` canopy biomass is greater than `Beauregard`. The
`LA06-52` canopy architecture was 31 cm in height from the soil
surface and 121 cm in a radial spread and slightly less than
`Beauregard` (182 cm). For `LA06-52`, three main vines arose from
the main stem near the soil surface. The stem giving rise to these
vines was 1.0-1.5 cm in diameter; the 3 lateral vines were 180 cm
in length with diameters of about 0.5 cm at 65 cm from the base and
diameters of about 0.6 cm at the first internode of the first fully
developed leaf from the apex. Four to six lateral branches arose
from each of the main vines. At the first internode from the apex,
the internode length was about 5.5 cm between the first and second
fully developed leaves. Internode lengths for other sections of the
vine averaged about 7 cm. Unfolded immature leaves were dark purple
[10 P (purple) (2/6)] for the upper and lower surface, which change
gradually over 7 nodes from the apex to a dark green upper surface
[7.5 G (green) Y (yellow) (3/4)] to a dark green lower surface [7.5
G (green) Y (yellow) (4/2)]. Mature leaves at five nodes from the
apex had an acute apex and mostly a cordate base and a smooth leaf
margin. Mature leaves were about 9.7 cm long and 10 cm wide. Leaves
were glabrous, without undulations, and pliable. The abaxial
surface has prominent raised veins; abaxial and adaxial veins are
in pinnate venation pattern, and were slightly purple [7.5 R (red)
P (purple) (4/4)]. The petiole was green [7.5 (3 (green) Y (yellow)
(3/4)]. A purple [7.5 R (red) P (purple) (4/4)] marking was at the
base of the leaf junction with the petiole. The round, glabrous
petiole was 8.5 cm long at five nodes from the apex, and 3 mm in
diameter at 5 cm from the leaf junction. The dormant nodal meristem
was green [2.5 G (green) Y (yellow) (5/6)].
A typical inflorescence of `LA06-52` displayed two clusters of six
flowers per peduncle. Peduncles were green [2.5 G (green) Y
(yellow) (5/8)], about 8-12 cm long, and about 3 mm in diameter.
Individual flowers were about 3.6 cm long from the base of the
calyx, and the corolla was 3 to 3.5 cm wide at the opening. The
fused flower petals formed a pentagonal pattern with smooth edges.
The inner throat of the corolla appeared purple [7.5 P (purple)
(4/6)]. The inner and outer limbs of the corolla (corollas
outermost area, distal from the calyx) were light purple [10 P
(purple) (7/4)]. The five sepals comprising the calyx were elliptic
with a cordate apex and appeared to be green [2.5 G (green) Y
(yellow) (5/6)]; three of these sepals were about 11 mm long and 4
mm wide. Two other sepals (interspersed) were about 6 mm long and 2
mm wide. Sepal margins were smooth. Stigmata were about 1.7 cm long
and appeared purple [7.5 R (red) P (purple) (8/6)] at the base
before fading. Five stamens were inferior to the stigmata. A slight
fragrance was present.
EXAMPLE 1
Tests Conducted
`LA06-52` did not appear to show any novel insect resistance.
To confirm that `LA06-52` was a new variety, controlled tests
(e.g., pathogen responses and yield) were conducted in Baton Rouge,
La. `Beauregard` was selected for comparison because of its
importance in commercial United States orange flesh sweetpotato
acreage. Diseases that commonly affect the growth of sweetpotatoes
were selected to test for pathogen responses in both varieties.
`LA06-52` was resistant for Streptomyces soil rot caused by
Streptomyces ipomoeae (Person & W. J. Martin) Waksman &
Henrici, while `Beauregard` was intermediate to resistant.
`LA06-52` and `Beauregard` were resistant to Fusarium wilt or stem
rot caused by Fusarium oxysporum Schlect. f. sp. batatas (Wollenw.)
Snyd. & Hans.
Nematode reproduction was measured in greenhouse tests. `LA06-52`
was highly resistant while `Beauregard` was susceptible to southern
root-knot nematode, Meloidogyne incognita (Kofoid & White 1919)
Chitwood 1949. `LA06-52` and `Beauregard` were intermediate to
Rhizopus soft rot caused by Rhizopus stolonifer (Ehr. ex. Fr.) Lind
as measured by postharvest inoculation of storage roots. `LA06-52`
was very susceptible to bacterial root rot caused by Dickeya
dadantii Samson et al, while `Beauregard` was susceptible as
measured by postharvest inoculation of storage roots.
To determine yield production, complete-block trials using four
replications of `LA06-52` and `Beauregard` each were conducted in
2007, 2011, 2012, and 2013 in areas of Louisiana, Arkansas,
Missouri, and California likely to produce `LA06-52`. `LA06-52` and
`Beauregard` sweetpotato plants were transplanted in randomized
complete-block trials at 31 cm spacings. Each block/plot was
fertilized with approximately 250 pounds per acre of a mixed
fertilizer comprising 13% N, 13% P.sub.2O.sub.5, and 13% K.sub.2O.
`LA06-52` was compared to `Beauregard` at transplanting dates
beginning in May-July. Average yields were measured for the
following grades of roots: U.S. #1 (51-89 mm in diameter, 76-229 mm
long); Canner (25-51 mm in diameter, 51-178 mm long), and Jumbo
(larger than U.S. #1 in diameter, length or both, and without
objectionable defects). A typical marketable root of `LA06-52` was
180-190 mm long, 70-80 mm in diameter, with mostly elliptic shape.
The base or distal end tended to be similar to the apex (proximal
end). U.S. #1 roots typically weighed 150-190 g.
A mid-season transplanting date trial was conducted at Sikeston,
Mo. in 2012. `06-52` and `Beauregard` were transplanted on Jun. 6,
2012, and harvested on Sep. 26, 2012 (112 days after planting).
Average yields, measured as Metric Tons per Hectare (MTha.sup.-1),
are shown in Table 2.
TABLE-US-00002 TABLE 2 Selection US#1.sup..dagger.
Canners.sup..dagger. Jumbos.sup..dagger. TMY.-
sup..dagger-dbl..dagger. `LA06-52` 41.8a 8.1a 25.4a 75.4a
`Beauregard` 22.4b 9.1a 30.5a 62.0a .sup..dagger.Average yields in
MT ha.sup.-1 of varieties followed by a common letter do not differ
significantly (P < 0.05) according to Duncan's Multiple Range
Test TMY.sup..dagger-dbl. = total marketable yield
An early season transplanting date trial was also conducted at
Grand Prairie, La. on May 31, 2012, and harvested on Oct. 4, 2012
(126 days after planting). Average yields (MTha.sup.-1) by grade of
`LA06-52` and `Beauregard` are shown in Table 3.
TABLE-US-00003 TABLE 3 Selection US#1.sup..dagger.
Canners.sup..dagger. Jumbos.sup..dagger. TMY.-
sup..dagger-dbl..dagger. `LA06-52` 14.9a 10.1a 0.5a 25.4a
`Beauregard` 21.3a 8.9a 1.2b 31.4b .sup..dagger.Average yields in
MT ha.sup.-1 of varieties followed by a common letter do not differ
significantly (P < 0.05) according to Duncan's Multiple Range
Test TMY.sup..dagger-dbl. = total marketable yield
An early season transplanting date trial was also conducted at
Grand Prairie, La. on Jun. 26, 2013, and harvested on Oct. 22, 2013
(119 days after planting). Average yields (MTha.sup.-1) by grade of
`LA06-52` and `Beauregard` are shown in Table 4.
TABLE-US-00004 TABLE 4 Selection US#1.sup..dagger.
Canners.sup..dagger. Jumbos.sup..dagger. TMY.-
sup..dagger-dbl..dagger. `LA06-52` 25.6a 7.1a 11.3a 44.0a
`Beauregard` 9.64a 9.1a 12.2b 30.9a .sup..dagger.Average yields in
MT ha.sup.-1 of varieties followed by a common letter do not differ
significantly (P < 0.05) according to Duncan's Multiple Range
Test TMY.sup..dagger-dbl. = total marketable yield
A mid to late season transplanting date trial was also conducted at
Montrose, Ak. on Jun. 13, 2012, and harvested on Oct. 19, 2012 (118
days after planting). Average yields (MTha.sup.-1) by grade of
`LA06-52` and `Beauregard` are shown in Table 5.
TABLE-US-00005 TABLE 5 Selection US#1.sup..dagger.
Canners.sup..dagger. Jumbos.sup..dagger. TMY.-
sup..dagger-dbl..dagger. `LA06-52` 20.1 a 14.8a 1.0a 35.9a
`Beauregard` 17.1a 25.0a 3.8a 45.9a .sup..dagger.Average yields in
MT ha.sup.-1 of varieties followed by a common letter do not differ
significantly (P < 0.05) according to Duncan's Multiple Range
Test TMY.sup..dagger-dbl. = total marketable yield
A mid to late-season transplanting date trial was also conducted at
Sikeston, Mo. on Jun. 21, 2013, and harvested on Oct. 28, 2013 (130
days after planting). Average yields (MTha.sup.-1) by grade of
`LA06-52` and `Beauregard` are shown in Table 6.
TABLE-US-00006 TABLE 6 Selection US#1.sup..dagger.
Canners.sup..dagger. Jumbos.sup..dagger. TMY.-
sup..dagger-dbl..dagger. `LA06-52` 34.4a 7.2a 5.2a 46.8a
`Beauregard` 21.6a 4.8a 4.4a 30.8a .sup..dagger.Average yields in
MT ha.sup.-1 of varieties followed by a common letter do not differ
significantly (P < 0.05) according to Duncan's Multiple Range
Test TMY.sup..dagger-dbl. = total marketable yield
A late-season transplanting date trial was also conducted at Chase,
La. on Jul. 2, 2007, and harvested on Nov. 11, 2007 (132 days after
planting). Average yields (MTha.sup.-1) by grade of `LA06-52` and
`Beauregard` are shown in Table 7.
TABLE-US-00007 TABLE 7 Selection US#1.sup..dagger.
Canners.sup..dagger. Jumbos.sup..dagger. TMY.-
sup..dagger-dbl..dagger. `LA06-52` 23.1a 9.1a 6.3a 38.6a
`Beauregard` 24.4a 10.1a 6.3a 37.5a .sup..dagger.Average yields in
MT ha.sup.-1 of varieties followed by a common letter do not differ
significantly (P < 0.05) according to Duncan's Multiple Range
Test. TMY.sup..dagger-dbl. = total marketable yield
A late-season transplanting date trial was also conducted at
Livingston, Calif. on Jun. 2, 2011, and harvested on Oct. 25, 2011
(145 days after planting). This represents a later planting date
compared to other production regions. Average yields (MTha .sup.-1)
by grade of `LA06-52` and `Beauregard` are shown in Table 8.
TABLE-US-00008 TABLE 8 Selection US#1.sup..dagger.
Canners.sup..dagger. Jumbos.sup..dagger. TMY.-
sup..dagger-dbl..dagger. `LA06-52` 8.4b 12.1a 4.8b 25.4b
`Beauregard` 14.1a 12.3a 13.0a 39.4a .sup..dagger.Average yields in
MT ha.sup.-1 of varieties followed by a common letter do not differ
significantly (P < 0.05) according to Duncan's Multiple Range
Test. TMY.sup..dagger-dbl. = total marketable yield
As shown in Tables 2-8, `LA06-52` produced yields comparable to,
and exceeding `Beauregard` in regional trials at various planting
dates. Yield in comparison to `Beauregard` in heavier silt loam
soils (Tables 3, 4, and 7) were similar to outcomes in lighter,
sandy loam soils (Tables 2, 5, 6 and 8). The Livingston, Calif.
plot was lower in yield than `Beauregard` for the important U.S. #1
grade; however, other plots in California have demonstrated strong
yields (19-30 MTha.sup.-1). There is a tendency for higher yield in
early and middle season plots in comparison to late season
plantings (Tables 7 and 8). Yield declines are within norms in poor
environments. `LA06-52` had harvestable roots approximately 120
days after planting, which is typical development time for
sweetpotatoes and comparable to `Beauregard`. The yield of Jumbo
grade is indicative of earliness and `LA06-52` was similar to the
jumbo yield of `Beauregard`, statistically; however, rank changed
from plot to plot. Yield of `LA06-52` for U.S. #1 grade was
significantly higher in one plot in 2012 and lower in one in 2011
in comparison to `Beauregard`. In total, this data reflects
consistent high yield characteristics for `LA05-62`.
Sugar profiles for baked `LA06-52` and `Beauregard` are shown in
Table 9. For this 2012 test, roots were stored for three months
after which they were baked at 190.degree. C. for approximately 2.0
h. Sucrose content in baked `LA06-52` was similar to that found in
baked `Beauregard`; maltose content was lower in comparison to
`Beauregard`. Total sugar content was similar for `LA06-52` and
`Beauregard` on a sucrose equivalency basis. High fructose content
in `LA06-52` compensated for lower maltose content. Dry matter is
slightly less for `LA06-52` (20.5%) in comparison to `Beauregard`
(21.3%). These results demonstrate a similar level of sweetness and
moistness for `LA06-52` and `Beauregard`.
TABLE-US-00009 TABLE 9 Selection Fructose.sup..dagger-dbl.
Glucose.sup..dagger-dbl. Sucrose.sup..- dagger-dbl.
Maltose.sup..dagger-dbl. Total sugars.sup..dagger..dagger-dbl.
`LA06-52` 1.79 2.36 2.41 2.16 8.72 `Beauregard` 0.96 1.20 2.30 4.89
9.35 .sup..dagger.Total sugars = fructose + glucose + maltose +
sucrose. .sup..dagger-dbl.mg g.sup.-1 fresh weight basis
`LA06-52` should be a valuable commercial sweetpotato variety.
`LA06-52` produced plants (sprouts) comparable to commercial
varieties lay California; however, plant production is below that
of `Beauregard` in Louisiana. Days to harvest for `LA06-52` were
similar to `Beauregard`. `L06-52` exhibited different sugar
profiles in comparison to `Beauregard`; however, sucrose
equivalency was similar.
* * * * *