Jordan

Oat

Variety Description

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

Summary: 'Jordan' heads later than the reference varieties. The plant height of 'Jordan' is taller than in 'Ronald'. 'Jordan' has a longer panicle than 'Ronald'. The lower glume of 'Jordan' is longer than in 'CDC Dancer'. 'Jordan' has weaker glaucosity of the lemma than 'CDC Dancer'. The kernel length of 'Jordan' is longer than the reference varieties. 'Jordan' has a heavier thousand kernel weight than the reference varieties. The number of seeds per spikelet of 'Jordan' is higher than the reference varieties. 'Jordan' has better Barley Yellow Dwarf virus resistance than 'CDC Dancer'.

Description:

SEEDLING (5-9 tiller stage): erect juvenile growth habit, sparse pubescence of lower leaf sheath, absent to very sparse pubescence of lower leaf blade.

LEAF (at booting stage): medium green colour, absent to very sparse pubescence, medium intensity of glaucosity, absent or very low frequency of plants with recurved/drooping flag leaves

STEM: dense pubescence/hairiness above and below upper culm node

PANICLE (just after heading): equilateral orientation, medium density, horizontal to drooping attitude of branches, 30-45 degrees between rachis and dominant side branch, absent or very few hairs or spines on the lowest panicle node

SPIKELET: fracture separation, semi-nodding
RACHILLA (at maturity): medium to long length between primary and secondary floret, medium length of grooves, very sparse to medium pubescence
GLUME: medium glaucosity
LEMMA: white to yellow colour at maturity, absent to very sparse pubescence on the lateral and dorsal surface, absent of glaucosity at the green stage, medium to large overlap of lemma on the palea at the green stage, very weak to weak tendency to be awned

KERNEL (primary kernels from upper spikelets): short basal hairs present, white to yellow colour, 3 per spikelet, pointed to rounded tip of the scutellum, medium sized scutellum, medium to dense groat pubescence,

DISEASE RESISTANCE: moderately susceptible to Crown Rust (Puccinia coronata, races CR13, 200, 223, 225, 241, 249, 254), moderately resistant to Stem Rust (Puccinia graminis f. sp. avenae, races NA8, 16, 25, 27, 28, 55), susceptible to Stem Rust (Puccinia graminis f. sp. avenae race NA67), resistant to Black Loose Smut (Ustilago avenae races A13, 60, 617) and Covered Smut (Ustilago kolleri) and resistant to moderately resistant to Barley Yellow Dwarf Virus (BYDV)

AGRONOMY: good lodging resistance, sensitive to daylength

Origin & Breeding History: 'Jordan' was developed at the Cereal Research Centre, Agriculture & Agri-Food Canada, Winnipeg, Manitoba. The parentage is OT377/Ronald, for which the cross occurred in the fall of 1997 using a modified pedigree method. OT377 = 97RAT31=OT338/AC Preakness. 'Jordan' is a white-hulled F5 derived line. F1 plants were produced in the growth cabinet during the winter of 1998. A bulk F2 was grown in the 1998 Rust/Smut Nursery at Glenlea, Manitoba. The seed was harvested from these plants, bulked and sized with the most uniform seeds being sent to the 1998-1999 winter nursery in New Zealand. In the winter nursery, F3 panicles were selected from space-planted long rows. Selection for Oat Crown Rust resistance and BYDV tolerance was possible. The F4 panicles from this nursery were screened in the 1999 Glenlea Rust/Smut Nursery. Fifty six disease resistant agronomically desirable rows were selected and grown as F5 hill plots in the 1999-2000 winter nursery in New Zealand. Concurrently, F5 lines were screened using know tester races, in the greenhouse at Winnipeg to verify the New Zealand rust readings. Whole oat subsamples from these lines were tested for quality attributes using NIR technology. Panicles from desirable, disease resistant plants were selected in New Zealand, and 277 rows from these panicles were planted in the 2000 Glenlea F6 Rust/Smut Nursery. Thirty three lines were selected from this nursery for superior disease resistance, agronomic performance and quality characteristics. The F7 lines were concurrently screened for crown and stem rust resistance in 2000-2001 winter greenhouse and for BYDV tolerance in 2000-2001 New Zealand winter nursery. Bulk-harvested seed from the three meter rows in the New Zealand nursery provided the planting seed for the 2001 Preliminary Yield Trial grown at Glenlea and Brandon Manitoba. OT2027 was tested for one year as W01332. It was tested for one year in the 2002 Rust Area Test, and two years in the Western Cooperative Oat Test (2003-2004).

Tests & Trials: Tests and trials were conducted in Glenlea, Manitoba during the summers of 2004, 2005. Plots consisted of 5 rows, 3.25 metres in length with a row spacing of 15.24 cm. There were 4 replicates arranged in an RCB design.

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

Days to heading (# of days from planting to 50% of panicles fully emerged from boot)

Plant height after heading (cm)

Panicle length (cm)

Lower glume length (mm)

Primary Kernel length (mm)

Thousand kernel weight (gm) (2003-2004 WCORT Data)

Click on image for larger view

Oat: 'Jordan' (OT2027) (center) with reference varieties 'Ronald' (left) and 'CDC Dancer' (right)