SY Rorke

Wheat

Variety Description

Variety used for comparison: 'Glenn'

Summary: At booting, the intensity of anthocyanin colouration on the auricles of the flag leaf of 'SY Rorke' is absent or very weak whereas it is strong on the auricles of 'Glenn'. At maturity, the spike colour of 'SY Rorke' is light yellow whereas the spike of 'Glenn' is brown. The lower glume beak is of medium length for 'SY Rorke' whereas it is short for 'Glenn'.

Description:

PLANT: spring type, common wheat, erect to semi-erect growth habit at 5 to 9 tiller stage, low to medium frequency of plants with recurved flag leaves, heads and matures mid-season

SEEDLING (4 LEAF STAGE): absent or very weak intensity of anthocyanin colouration of coleoptile, glabrous sheath and blade of lower leaves

FLAG LEAF: absent or very weak intensity of anthocyanin colouration of auricles, absent or very weak to weak glaucosity of sheath, glabrous blade and sheath

CULM: weak to medium glaucosity, curved neck
STRAW: thin to medium thickness of pith in cross-section, anthocyanin colouration absent at maturity

SPIKE: weak glaucosity at heading, tapering shape in profile, medium density, light yellow at maturity, erect attitude, absent or very sparse to sparse hairiness of convex surface of apical rachis segment
AWNS: shorter than length of spike, light brown
LOWER GLUME: long, medium width, glabrous, sparse extent of internal hair
LOWER GLUME SHOULDER: narrow to medium width, straight shape
LOWER GLUME BEAK: medium length, straight shape
LOWEST LEMMA: slightly curved beak

KERNEL: hard red, medium red, medium size, medium length, narrow to medium width, elliptical shape, rounded cheek, short to medium length brush hairs, narrow crease, shallow to medium depth of crease
GERM: medium size, oval

BREAD MAKING QUALITY: good

Origin & Breeding History: 'SY Rorke' (experimental designations HY2068, NH005 and CS11300017-3) originated from the cross between 'HY993' and '05S0043-20W' made in Berthoud, Colorado, USA, in 2011. Individual head selections were made from the F2 population at Syngenta Canada Inc. in Rosebank, Manitoba, in 2012, based on plant height, maturity, and leaf rust, leaf disease complex and Fusarium head blight resistance. A single seed descent technique was used to advance these selections through the F3 and F4 generations in a greenhouse. In 2013, F5 headrows were selected and individually bulked from a nursery and entered into a yield trial in Rosebank, Manitoba in 2014. One of the selections was designated as CS11300017-3 and sent to a winter nursery in New Zealand for generation advancement in 2014. The resulting F8 was entered in Syngenta Canada, Inc. multi-location research plots in 2015. In 2015, 100 heads were selected for initial purity from the F9 increase plots, based on yield, test weight, plant height, maturity, comprehensive milling and baking quality, and leaf rust, leaf disease complex and Fusarium head blight resistance. In 2016, 100 progeny rows were planted in Rosebank, Manitoba and progeny plots subsequently planted in Berthoud, Colorado in 2017. In 2018, the 100 progeny rows were selected based on agronomy, pathology and quality assessment and bulked for breeder seed. The variety was tested as NH005 in the Canadian Northern Hard Red Co-op in 2016 and tested as HY2068 in the High Yield Bread Wheat Co-op in 2017 and 2018.

Tests & Trials: The comparative trials for 'SY Rorke' were conducted during the 2018 and 2019 growing seasons near Rosebank, Manitoba. There were three replicates arranged in a RCB Design. Plots consisted of 7 rows, with a row length of 3 metres and row spacing of 18 cm. Planting density resulted in each plot having approximately 2400 plants per variety. Measured characteristics were based on 20 measurements per variety per year.

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Wheat: 'SY Rorke' (left) with the reference variety 'Glenn' (right)