Prostar

Soybean

Variety Description

Varieties used for comparison: 'Amistar', 'Kazart', 'Mozart' and 'OAC Prudence'

Summary: When the cotyledons are completely open, the hypocotyl of ‘Prostar' has a medium intensity of anthocyanin colouration whereas the hypocotyl of ‘Amistar' and ‘Kazart' have a strong intensity of anthocyanin colouration. The leaf of ‘Prostar' has strong blistering whereas the leaf of ‘Mozart' and ‘Kazart' have a medium degree of blistering. When 95% of the pods are ripe, the pod of ‘Prostar' is medium brown whereas that of ‘OAC Prudence' and ‘Mozart' is light brown.

Description:

HYPOCOTYL: medium intensity anthocyanin colouration

PLANT: indeterminate growth type, erect to semi-erect branch attitude, grey pubescence on middle third of main stem, begins flowering and matures very early

LEAF: strong blistering, medium to dark green
LATERAL LEAFLET: triangular, small

FLOWER: violet

POD: medium brown
SEED: elongated, yellow ground colour of testa
HILUM: yellow
FUNICLE: same colour as testa

Origin & Breeding History: 'Prostar' (experimental designation ‘20SS02') originated from a biparental cross conducted in 2011 in Princeville, Quebec, Canada between the female parent ‘Alto' and the male parent ‘Toma'. Generations F1 to F4 were grown in mass populations from 2012 to 2015, with early selections based on maturity, lodging resistance, and protein content. Individual plant selections were made from the F4 in 2015, and their seeds were sown in individual rows. F5 rows were selected for potential yield, early maturity, hilum colour, lodging resistance, and protein content. The selected line was designated ‘20SS02' and evaluated in preliminary and advanced selection trials from 2017 to 2021. Breeder seed originated from a single row selected during these trials in 2022.

Tests & Trials: The comparative trials for 'Prostar' were conducted in 2023 and 2024 at the Centre de Recherche Semican in Princeville, Quebec, Canada. The trials were arranged in a RCB design with 3 replicates per variety. A planting density of 240 plants per replicate resulted in a total of 720 plants per variety. Measurements were taken from 20 plants, or parts of 20 plants, of each variety per year.

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Soybean: ‘Prostar' (centre) with reference varieties 'OAC Prudence' (top left), 'Amistar' (bottom left), 'Kazart' (top right) and 'Mozart' (bottom right)