SY Cast

Wheat

Variety Description

Varieties used for comparison: 'Glenn' and 'SY Crossite'

Summary: At the 5 to 9 tiller stage, the plants of 'SY Cast' have a semi erect growth habit while the plants of 'Glenn' have an erect growth habit. At booting, 'SY Cast' has a very high frequency of plants with recurved flag leaves while 'Glenn' has a low to medium frequency of plants with recurved flag leaves. The flag leaf auricles of 'SY Cast' have an absent or very weak intensity of anthocyanin colouration while the flag leaf auricles of 'Glenn' have a medium to strong intensity of anthocyanin coloration and those of 'SY Crossite' have a weak to medium intensity of anthocyanin colouration. The flag leaf of 'SY Cast' is larger than the flag leaf of 'Glenn'. The plants of 'SY Cast' head later than the plants of 'Glenn'. At heading, the spike of 'SY Cast' has medium glaucosity while the spike of 'Glenn' has weak glaucosity. At maturity, the spike of 'SY Cast' has an erect attitude while the spike of 'Glenn' has an inclined attitude. The lower glume shoulder of 'SY Cast' is narrow to medium in width while that of 'Glenn' is broad.

Description:

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

SEEDLING (4-leaf stage): glabrous sheath and blade of lower leaves

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

CULM: medium glaucosity, curved neck
STRAW: thin pith in cross-section, no anthocyanin colouration at maturity

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

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

Origin & Breeding History: 'SY Cast' (experimental designation CS11200104-11) originated from a cross between 'BW952' and 'Muchmore' conducted in Berthoud, Colorado in 2011. F2 head selections were made at the Syngenta Canada Inc. breeding nursery in Rosebank, Manitoba in 2012 with single seed descent technique used to advance the selections through the F3 and F4 generations in a greenhouse. In 2013, F5 headrows were individually bulked and entered into a yield trial in Rosebank, Manitoba in 2014. One of the bulk selections designated CS11200104-11 was advanced and increased in a winter nursery in New Zealand in 2014-2015 and entered in Syngenta Canada Inc. multiple location research plots in 2015. The new variety was tested in the Syngenta Private Registration Trials from 2016 to 2018. In 2018, seventeen F4:12 plots were bulked in Eaton, Colorado to establish breeder seed. Selection criteria used in the development of 'SY Cast' included plant height, plant maturity, disease resistance, yield, test weight and comprehensive milling and baking quality.

Tests & Trials: The comparative trials for 'SY Cast' were conducted at the Syngenta Canada Inc., Rosebank Research Farm in Rosebank, Manitoba in 2019 and 2021. There were 3 replicates per variety arranged in an RCB design in each year of trials. In 2019, plots consisted of 7 rows, each row was 3.0 metres long with 0.18 metre inter-row spacing. The seeding density in 2019 was 645 seeds per squared metre, resulting in approximately 7200 plants per variety. In 2021, plots consisted of 6 rows, each row was 5 metres long with 0.25 metre inter-row spacing. The seeding density in 2021 was 330 seeds per squared metre, resulting in approximately 6000 plants per variety. Measured characteristics were based on a minimum of 20 measurements per variety per year. Mean differences were significant at the 5% probability level based on a paired Student's t-test.

Comparison tables for 'SY Cast' with reference varieties 'Glenn' and 'SY Crossite'

Flag leaf length (cm)

Flag leaf width (mm)

Days to heading (days from planting to when 50% of heads are fully emerged from boot)

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Wheat: 'SY Cast' (right) with reference varieties 'Glenn' (centre) and 'SY Crossite' (left)

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Wheat: 'SY Cast' (left) with reference varieties 'Glenn' (centre) and 'SY Crossite' (right)

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Wheat: 'SY Cast' (right) with reference varieties 'Glenn' (centre) and 'SY Crossite' (left)