Leggett

Oat

Denomination: 'Leggett'
Previously Proposed Denomination: 'OT2021'
Botanical Name: Avena sativa
Applicant/Holder: Agriculture & Agri-Food Canada, Winnipeg
Cereal Research Centre
195 Dafoe Road
Winnipeg, Manitoba
R3T 2M9
Canada
Breeder: Jennifer Mitchell Fetch, Agriculture & Agri-Food Canada, Winnipeg, Manitoba
Agent in Canada: Agriculture & Agri-Food Canada
Office of Intellectual Property and Commercialization
6000 C&E Trail
Lacombe, Alberta
T4L 1W1
Canada
Tel: (403) 782-8126
Application Date: 2004-04-15
Application Number: 04-4168
Grant of Rights Date: 2006-08-11
Certificate Number: 2488
Grant of Rights Termination Date: 2024-08-11

Variety Description

Varieties used for comparison: 'Ronald' and 'CDC Dancer'

Summary: 'Leggett' has a slightly narrower longer flag leaf than 'CDC Dancer'. The flag leaf of 'Leggett' is longer than 'Ronald'. 'Leggett' has more pubescence above and below the upper culm node than 'Ronald' and 'CDC Dancer'. The panicle of 'Leggett' is shorter than 'CDC Dancer'. 'Leggett' has basal hairs on the kernel while 'Ronald' and 'CDC Dancer' do not. The crown rust (Puccinia coronata) resistance in 'Leggett' is better than 'Ronald' and 'CDC Dancer'.

Description:

'Leggett' is a hulled spring oat variety. Juvenile growth habit is erect with medium pubescence of the lower leaf sheath. The lower leaf blades have very sparse pubescence. The leaves at booting stage are medium to dark green in colour with very sparse pubescence of the leaf margins. There is a very low frequency of plants with recurved/drooping flag leaves. The stem segment immediately above and below the upper culm node has medium to very dense pubescence.

The panicle of 'Leggett' is symmetrical in shape, with lax to moderate density. The branches are semi-erect to horizontal in attitude. The angle between the rachis and dominant side branch is 30 to 45 degrees. There are no hairs or spines on the lower panicle node. The rachilla has a second floret which is medium in length. At maturity the rachilla has medium depth grooves. Spikelet separation is by fracture. Spikelet attitude is semi-nodding.

The lemma of 'Leggett' is white to yellow in colour at maturity with absent or very sparse to sparse pubescence on the lateral and dorsal surface. The lateral and dorsal surfaces of the lemma are glabrous with very weak to weak glaucosity at the green stage.

The kernels are white to cream coloured, with very short to short basal hairs. There are two grains per spikelet.

'Leggett' is resistant to Crown rust (Puccinia coronata) races CR13, CR181, CR185, CR192, CR223 and CR225, to Black loose smut (Ustilago avenae) races A13, A60 and A617 and covered loose smut (Ustilago kolleri), and moderately resistant to moderately susceptible to Red leaf Barley yellow dwarf virus (BYDV). 'Leggett' has good lodging resistance and is sensitive to day length.

Origin & Breeding History: 'Leggett' originated from a cross made in 1996 at the Cereal Research Center, AAFC-Winnipeg. This F6 derived line was developed using a modified pedigree method. The pedigree of 'Leggett' is OT294/Pc94, where OT294=OT230/OT244//AC Medallion, and Pc94=Dumont*3//Saia/7*SunII. F1 plants were produced in the growth cabinet during the winter of 1997. A bulk F2 was grown in the 1997 Rust/Smut Nursery at Glenlea, Manitoba. The seed was harvested from these plants, bulked and sized, and then the most uniform seeds were sent to the winter nursery in New Zealand in 1997-1998. There, F3 panicles were selected based on oat crown resistance due to the likely presence of Pc39, Pc68 and Pc94 gene combination. 177 F4 panicle rows were screened in the 1998 Glenlea Rust/Smut nursery. 20 disease resistant, agronomically desirable rows were selected and grown as F5 hill plots in the 1998-1999 winter nursery in New Zealand. Concurrently, F5 plants were screened using known tester races in the greenhouse in Winnipeg to verify the New Zealand rust readings. Panicles from desriable, disease resistant plants were selected in New Zealand and 133 rows from those panicles were planted in the 1999 Glenlea F6 Rust/Smut nursery. 27 lines were selected from this nursery for superior disease resistance, agronomic performance and quality characteristics. The F7 plants were screened for crown and stem rust resistance in the 1999-2000 winter greenhouse and for BYDV tolerance in the 1999-2000 New Zealand winter nursery. Bulk harvested seed from the 3 meter long short rows in this nursery provided the planting seed for the 2000 Preliminary Yield Trial grown in Glenlea, Brandon, and Morden, Manitoba. OT2021 was tested for one year in the Preliminary Yield Trial as W00371. It was then tested for one year in the 2001 Rust area Test, and two years in the Western Cooperative Oat Test (2002-2003).

Tests & Trials: The tests and trials consisted of five row plots with row spacing of 15.24 cm. There were 4 replicates arranged in a RCB design. Trials were conducted in the summers of 2003 and 2004 in Glenlea, Manitoba. Means are based on a two year average.


Comparison tables for 'Leggett' with reference varieties 'Ronald' and 'CDC Dancer'

Flag leaf length (cm)

  'Leggett' 'Ronald' 'CDC Dancer'
mean 20.65 18.65 17.62

Flag leaf width (mm)

  'Leggett' 'Ronald' 'CDC Dancer'
mean 13.58 13.55 14.85

Panicle length (cm)

  'Leggett' 'Ronald' 'CDC Dancer'
mean 14.39 14.89 16.97
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