U.S. patent number PP32,021 [Application Number 16/350,993] was granted by the patent office on 2020-07-28 for sweetpotato plant named `la13-81`.
This patent grant is currently assigned to THE BOARD OF SUPERVISORS OF LOUISIANA STATE UNIVERSITY AND AGRICULTURAL AND MECHANICAL COLLEGE. The grantee listed for this patent is The Board of Supervisors of Louisiana State University and Agricultural and Mechanical College. Invention is credited to Christopher A. Clark, Don R. LaBonte, Tara P. Smith, Arthur Q. Villordon.
United States Patent |
PP32,021 |
LaBonte , et al. |
July 28, 2020 |
Sweetpotato plant named `LA13-81`
Abstract
A new variety of sweetpotato, identified as `LA13-81`, is
disclosed having disease resistance to both Fusarium wilt and
Streptomyces soil rot; an orange flesh storage root and deep
red-purple skin, and high yield characteristics.
Inventors: |
LaBonte; Don R. (Baton Rouge,
LA), Villordon; Arthur Q. (Chase, LA), Smith; Tara P.
(Alexandria, LA), Clark; Christopher A. (Baton Rouge,
LA) |
Applicant: |
Name |
City |
State |
Country |
Type |
The Board of Supervisors of Louisiana State University and
Agricultural and Mechanical College |
Baton Rouge |
LA |
US |
|
|
Assignee: |
THE BOARD OF SUPERVISORS OF
LOUISIANA STATE UNIVERSITY AND AGRICULTURAL AND MECHANICAL
COLLEGE (Baton Rouge, LA)
|
Family
ID: |
71783165 |
Appl.
No.: |
16/350,993 |
Filed: |
February 8, 2019 |
Current U.S.
Class: |
PLT/258 |
Current CPC
Class: |
A01H
5/06 (20130101); A01H 6/00 (20180501) |
Current International
Class: |
A01H
5/06 (20180101); A01H 6/00 (20180101) |
Field of
Search: |
;PLT/258,263.1,226,256 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Osborne et al. New sweet potato variety on the way for Louisiana
growers. 2018 LSU Ag Center, retrieved on Oct. 30, 2019, retrieved
from the Internet at
https://www.lsuagcenter.com/profiles/rbogren/articles/page1534945274695,
8 pp. (Year: 2018). cited by examiner.
|
Primary Examiner: Hwu; June
Attorney, Agent or Firm: Donelson; Baker
Claims
We claim:
1. A new and distinct variety of Ipomoea batatas plant named
`LA13-81` as described and illustrated in the specification herein.
Description
Genus and species name: Ipomoea batatas (L.) Lam.
Variety denomination: `LA13-81`.
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
This invention pertains to a new and distinct variety of
sweetpotato. This new and distinct sweetpotato variety demonstrates
superior disease resistance to Fusarium wilt and exhibits a storage
root with orange flesh. It also demonstrates a deep red-purple skin
in comparison to `05-111` with a light to medium rose skin.
This new and distinct sweetpotato variety is identified as
`LA13-81` and is characterized by a storage root with orange flesh,
consistent shape, and a deep red-purple skin.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a color photograph of the fleshy root form of the novel
variety of sweetpotato identified as `LA13-81`.
FIG. 2 is a color photograph of the fleshy root form of the
sweetpotato variety identified as `05-111`.
FIG. 3 is a color photograph of the canopy biomass of the novel
variety of sweetpotato identified as `LA13-81`.
DETAILED BOTANICAL DESCRIPTION
This new variety of sweetpotato, named `LA13-81`, resulted from an
open-pollinated cross performed in 2012 to the patented female
parent `Bonita` (U.S. Plant Pat. No. 22,719 P3). The male parent
was unknown. Five patented male parents (`05-111` patented U.S.
Plant Pat. No. 23,761 P3; `Evangeline` patented U.S. Plant Pat. No.
19,710 P3; `LA06-52` patented U.S. Plant Pat. No. 26,735 P3;
`07-146` U.S. Plant Pat. No. 23,785 P3; `LA04-175` U.S. Plant Pat.
No. 25,308 P3) were among the potential pollen sources in the
crossing nursery. `LA13-81` was developed to provide a variety with
characteristics similar to `05-111`, but with a red-purple skin.
The female parent `Bonita` has white fleshed storage roots.
Plants of `LA13-81` and variety `05-111` can be differentiated.
Abaxial and axial veins of `LA13-81` are red purple [5 R (red) P
(purple) (2/6)]. `05-111` has no red hue to veins. Roots of
`LA13-81` are a deep red-purple skin and can be differentiated from
the light tan of the female parent `Bonita` (U.S. Plant Pat. No.
22,719 P3). Color terminology used herein is in accordance with the
MUNSELL.RTM. Book of Color (2003 Edition, Munsell Color,
GretagMacbeth LLC, 617 Little Britain Road, New Windsor, N.Y.
12553-6148). 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 `LA13-81`.
`LA13-81` roots were stored during the winter in Chase, La.
`LA13-81` was planted the following spring, resulting in
approximately 8-10 sprouts per root. Cuttings from the sprouts were
transplanted successfully for asexual reproduction in Chase, La.
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 `LA13-81` sweetpotato.
The skin is a deep red-purple and differs from the light to medium
rose `05-111`, both at harvest and after several months of storage
as shown in Table 1. No eyes or longitudinal grooving is present.
MUNSELL.RTM. Book of Color values for skin and flesh for both
`LA13-81` and `05-111` storage roots are shown in Table 1. The
`05-111` sweetpotato is depicted in FIG. 2. The skin for both
`LA13-81` and `05-111` was smooth. The `LA13-81` cortex was 3.3 mm
in depth and the color similar throughout. The flesh of `LA13-81`
is similar in comparison to `05-111`.
TABLE-US-00001 TABLE 1 Variable Variety Color Skin `LA13-81` 7.5 R
(red) P (purple) 3/8 `05-111` 2.5 Y (yellow) R (red) 6/6 Flesh
`LA13-81` 5 Y (yellow) R (red) 7/14 `05-111` 2.5 Y (yellow) R (red)
7/8
FIG. 3 depicts the canopy biomass of `LA13-81` sweetpotato. Stems
of `LA13-81` are green and remain unchanged [2.5 G (green) Y
(yellow) (6/8)] except for an underlying red-purple hue [2.5 R
(red) P (purple) (5/6)]. The `LA13-81` canopy biomass appears
similar to `05-111`. The `LA13-81` canopy architecture was
spreading and average (15-20) cm in height from the soil surface
and comparable to `05-111`. For `LA13-81`, three to four main vines
arose from the main stem near the soil surface. The stem giving
rise to these vines was 2 cm in diameter; the 3-4 lateral vines
were 294 cm in length with diameters of about 0.6 cm at 65 cm from
the base and diameters of about 0.8 cm at the first internode of
the first fully developed leaf from the apex. The spread is
comparable to `05-111` and average. Seventeen lateral branches
arose from each of the main vines. At the first internode from the
apex, the internode length was about 4 cm between the first and
second fully developed leaves. Internode lengths for other sections
of the vine averaged about 4.1 cm. Unfolded immature leaves were
green [2.5 G (green) Y (yellow) (4/6)] for the adaxial and abaxial
surface, which change nominally over one to two nodes from the apex
for the adaxial surface to a slightly lighter green lower surface
[5 G (green) Y (yellow) (5/4)]. Anthocyanin pigmentation and
pubescence were absent. Mature leaves at five nodes from the apex
had an acute apex and mostly a cordate base and an entire leaf
margin. Some leaves are shallow tricuspid. Mature leaves were about
9.2 cm long and 9.4 cm wide. Adaxial and abaxial veins were in a
pinnate venation pattern and small in extent of purple [5 R (red) P
(purple) (4/4)] pigmentation. Abaxial and adaxial surfaces were
smooth. The petiole was green [2.5 G (green) Y (yellow) (5/6)]. A
red-purple [5 R (red) P (purple) (2/6)] marking was at the base of
the leaf junction with the petiole. The petiole was 8.2 cm long at
five nodes from the apex, and 3.3 mm in diameter at 5 cm from the
leaf junction. The dormant nodal meristem has slight red-purple
marking [5 R (red) P (purple) (4/10)] which appears redder than the
base of the leaf junction
A typical inflorescence of `LA13-81` displayed one cluster of
three-five flowers per peduncle. Peduncles were green [10 G (green)
Y (yellow) (5/8)], about 9 cm long, and about 3 mm in diameter.
Individual flowers were about 3 cm long from the base of the calyx,
and the corolla was 3 cm wide at the opening. The fused flower
petals formed a pentagonal pattern with smooth edges. The inner
throat of the corolla was purple [7.5 R (red) 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 was green [2.5 G (green) Y (yellow) (5/6)]; three of these
sepals were about 12 mm long and 4.7 mm wide. Two other sepals
(interspersed) were about 10 mm long and 3 mm wide. Sepal margins
were entire. Stigmata were about 1.2 cm long and light purple [7.5R
(red) P (purple) (8/4)] at the base before fading. Five stamens
were inferior to the stigmata. A slight fragrance was present.
Mature seed capsules are round and 6.3 mm in length and width, and
seeds are 3.5 mm round. One black [neutral 1.75] seed is produced
on average per capsule.
EXAMPLE 1
Tests Conducted
To confirm that `LA13-81` was a new variety, controlled tests
(e.g., pathogen responses and yield) were conducted in Baton Rouge,
La. `05-111` 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. Scions
of `LA13-81` and `05-111` reacted similarly to most diseases
evaluated in the controlled tests. `LA13-81` was resistant and
`05-111` was intermediate to resistant for Streptomyces soil rot
caused by Streptomyces ipomoeae (Person & W. J. Martin) Waksman
& Henrici. `LA13-81` and `05-111` were resistant to Fusarium
wilt or stem rot caused by Fusarium oxysporum Schlect. f sp.
batatas (Wollenw.) Snyd. & Hans. `LA13-81` was intermediate and
`05-111` was resistant to Rhizopus soft rot caused by Rhizopus
stolonifer (Ehr. ex. Fr.) Lind. `LA13-81` was intermediate and
`05-111` was susceptible to bacterial root rot caused by Dickeya
dadantii Samson et al. as measured by postharvest inoculation of
storage roots.
Nematode reproduction was measured in greenhouse tests. `LA13-81`
and `05-111` were very susceptible to race 3 of the southern
root-knot nematode, Meloidogyne incognita (Kofoid & White 1919)
Chitwood 1949.
`LA13-81` is drought and heat tolerant like `05-111` and succumbs
to death at freezing like `05-111`.
`LA13-81` did not appear to show any novel insect resistance.
`LA13-81` has consistently ranked lower in banded cucumber beetle
(Diabrotica balteata LeConte) in comparison to `05-111` in 2017 and
2018 trials.
To determine yield production, complete-block trials using three to
four replications of `LA13-81` and `05-111` each were conducted in
2016 and 2017 in areas of Louisiana, Mississippi, Arkansas,
California and South Carolina likely to produce `LA13-81`.
`LA13-81` and `05-111` 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.
`LA13-81` was compared to `05-111` at transplanting dates in
May-June. 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 `LA13-81` was 180-190 mm long, 60-70
mm in diameter, with mostly elliptic shape. The base or distal end
tended to be more elongated in comparison to slightly rounder apex
(proximal end). U.S. #1 roots typically weighed 150-190 g.
A mid-season transplanting date trial was conducted at Senatobia,
Miss. in 2017. `LA13-81` and `05-111` were transplanted on May 24,
2017 and harvested on Sep. 19, 2017 (118 days after planting).
Average yields, measured as Metric Tons per Hectare (MTha.sup.-1),
for `LA13-81` and `05-111` are shown in Table 2.
TABLE-US-00002 TABLE 2 Mid-season transplant date yield trial.
Selection US#1.sup..dagger. Canners.sup..dagger.
Jumbos.sup..dagger. TMY.- sup..dagger-dbl..dagger. `LA13-81` 58.49a
21.24a 0.00a 79.45a `05-111` 32.26a 16.87a 4.15a 52.22a
.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-season transplanting date trial was also conducted at Wynne,
Ark. in 2017. `LA13-81` and `05-111` were transplanted on Jun. 6,
2017 and harvested on Oct. 26, 2017 (121 days after planting).
Average yields, measured as Metric Tons per Hectare (MTha.sup.-1),
for `LA13-81` and `05-111` are shown in Table 3.
TABLE-US-00003 TABLE 3 Mid-season transplant date yield trial.
Selection US#1.sup..dagger. Canners.sup..dagger.
Jumbos.sup..dagger. TMY.- sup..dagger-dbl..dagger. `LA13-81` 23.53a
20.45a 4.26a 48.19a `05-111` 24.42a 10.81a 26.22b 61.41b
.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
Windsor, S.C. in 2017. `LA13-81` and `05-111` were transplanted on
May 18, 2017 and harvested on Nov. 11, 2017 (174 days after
planting). Average yields, measured as Metric Tons per Hectare
(MTha.sup.-1), for `LA13-81` and `05-111` are shown in Table 4.
TABLE-US-00004 TABLE 4 Early-season transplant date yield trial.
Selection US#1.sup..dagger. Canners.sup..dagger.
Jumbos.sup..dagger. TMY.- sup..dagger-dbl..dagger. `LA13-81` 35.07a
10.65a 0a 45.72a `05-111` 29.92a 24.26a 0a 54.12a
.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-season transplanting date trial was also conducted at Forest,
La. in 2016. `LA13-81` and `05-111` were transplanted on May 31,
2016 and harvested on Oct. 29, 2016 (122 days after planting).
Average yields, measured as Metric Tons per Hectare (MTha.sup.-1),
for `LA13-81` and `05-111` are shown in Table 5.
TABLE-US-00005 TABLE 5 Mid-season transplant date yield trial.
Selection US#1.sup..dagger. Canners.sup..dagger.
Jumbos.sup..dagger. TMY.- sup..dagger-dbl..dagger. `LA13-81` 22.13a
10.98a 1.29a 34.4a `05-111` 22.36a 13.78a 7.68a 43.82a
.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
Livingston, Calif. in 2016. `LA13-81` and `05-111` were
transplanted on May 18, 2016 and harvested on Oct. 14, 2017 (149
days after planting). Average yields, measured as Metric Tons per
Hectare (MTha.sup.-1), for `LA13-81` and `05-111` are shown in
Table 6.
TABLE-US-00006 TABLE 6 Early-season transplant date yield trial.
Selection US#1.sup..dagger. Canners.sup..dagger.
Jumbos.sup..dagger. TMY.- sup..dagger-dbl..dagger. `LA13-81` 26.63a
9.77a 15.77a 52.16a `05-111` 29.09a 7.80b 10.95a 47.84a
.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 2-6, `LA13-81` produced yields comparable to
`05-111` in regional trials at various planting dates. Yield in
comparison to `05-111` in heavier silt loam soil (Table 5) were
similar to outcomes in lighter, sandy loam soils (Tables 1, 2, 3, 4
and 6). Replicated plots at other farms and on station have shown
`LA13-81` has consistent yields for early, middle, or late season
plantings. Yield declines are within norms in poor environments.
`LA13-81` had harvestable roots approximately 115-120 days after
planting, which is typical development time for sweetpotatoes and
comparable to `05-111`. The yield of Jumbo grade is indicative of
earliness and `LA13-81` was similar to the jumbo yield of `05-111`.
In total, this data reflects consistent high yield characteristics
for `LA13-81`. `LA13-81` has a storage life and shipping quality
comparable to `05-111`.
`LA13-81` should be a valuable commercial sweetpotato variety.
`LA13-81` equals yield for US #1 and total marketable yield in
comparison to `05-111` and represents a novel skin color useful in
marketing as a specialty type red in premium retail
environments.
* * * * *
References