OAC Bruton

Soybean

Variety Description

Varieties used for comparison: 'OAC Prosper' and 'HDC Blake'

Summary: The hypocotyl of 'OAC Bruton' has no anthocyanin colouration whereas the hypocotyl of 'HDC Blake' has anthocyanin colouration present. At maturity, 'OAC Bruton' has a large seed whereas the seed of 'OAC Prosper' is medium to large in size.

Description:

PLANT: oilseed type, indeterminate growth type, erect to semi-erect growth habit, grey pubescence on middle third of main stem, begins flowering mid-season, matures mid to late season

HYPOCOTYL: anthocyanin colouration absent

LEAF: weak to medium blistering, medium to dark green
LATERAL LEAFLET: pointed ovate
TERMINAL LEAFLET: ovoid, medium size

FLOWER: white

SEED: large, spherical to spherical flattened, yellow ground colour of testa, weak glaucosity, opaque to intermediate glossiness of testa
HILUM: yellow
FUNICLE: same colour as testa

Origin & Breeding History: 'OAC Bruton' originated from the cross between 'OAC Starfield' and 'SC2307' made in 2008 at the University of Guelph, Guelph, Ontario. The F1 seeds were grown in a growth room at the University of Guelph, Guelph campus to the first trifoliate stage and transplanted to a nursery in Ridgetown, Ontario in 2008. The F2 and F3 populations were advanced using a modified single-seed descent method, in which one pod was harvested from each plant and the seeds were saved for replanting and establishing the next generation in a winter nursery in Costa Rica during winter 2008. In 2009, the F4 seeds were space planted in Ridgetown and selections were made based on maturity and agronomic performance. In 2010, the five selected lines were grown in 4 metre plant rows in Ridgetown and further selections were made based on lodging resistance, plant height, and bottom pod height. Line selections were bulked again and were further evaluated for yield, agronomic characteristics, and seed quality traits in preliminary yield trials in 2011. Further selections were made among the F4:6 and F4:7 lines for desirable agronomic traits. Seeds of individual F4:8 plants were evaluated for uniformity and 55 plants were selected for further purification and pre-breeder seed production. Breeder seed was produced by bulking seeds of 14 uniform plots of F8:9 plants in 2014.

Tests & Trials: The comparative trials for 'OAC Bruton' were conducted during the 2018 and 2019 growing seasons in St. Thomas, Ontario. The 2018 plots consisted of 4 rows per variety with a row spacing of 43 centimetres and a row length of 1.5 metres. The 2019 plots consisted of 1 row, 9 metres in length per variety. Both 2018 and 2019 trials were aranged in a 3 replicates RCB design. Measurements were taken from 20 plants or parts of 20 plants of each variety per year.

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Soybean: 'OAC Bruton' (left) with reference varieties 'OAC Prosper' (centre) and 'HDC Blake' (right)