OAC Stirling
| Denomination: | 'OAC Stirling' |
|---|---|
| Previously Proposed Denomination: | 'SC 8518N' |
| Botanical Name: | Glycine max |
| Applicant/Holder: |
University of Guelph Germplasm Research Innovation Office Building #92, 50 Stone Road East Guelph, Ontario N1G 2W1 Canada |
| Breeder: |
Eskandari Milad, University of Guelph, Ridgetown Campus, Ridgetown, Ontario |
| Application Date: | 2022-01-22 |
| Provisional Protection: | 2022-01-22 |
| Application Number: | 22-10784 |
| Grant of Rights Date: | 2025-11-13 |
| Certificate Number: | 7530 |
| Grant of Rights Termination Date: | 2045-11-13 |
Variety Description
Varieties used for comparison: 'OAC Bruton' and 'OAC Kent'
Summary: When cotyledons are completely unfolded, anthocyanin accumulation in the hypocotyl is present for ‘OAC Stirling' whereas it is absent for ‘OAC Bruton. The plants of ‘OAC Stirling' have a semi-determinate growth type whereas the plants of both reference varieties have an indeterminate growth type. The flower of ‘OAC Stirling' is violet whereas the flower of ‘OAC Bruton' is white. At maturity, the seed of ‘OAC Stirling' is shorter and narrower than that of the reference varieties. The seed weight of ‘OAC Stirling' is less than those of the reference varieties.
Description:
HYPOCOTYL: anthocyanin colouration present
PLANT: semi-indeterminate growth type, semi erect branch attitude, grey pubescence on middle third of main stem, begins flowering mid-season, matures mid to late season
LEAF: medium green upper side
TERMINAL LEAFLET: ovoid, medium size
LATERAL LEAFLET: pointed ovate, medium size
FLOWER: violet
POD: light brown
SEED: small to medium sized, spherical flattened, weak glaucosity, yellow ground colour of testa, opaque testa
HILUM: yellow, funicle same colour as testa
Origin & Breeding History: ‘OAC Stirling' (experimental designation ‘SC 8518N') was developed at the University of Guelph, Ridgetown Campus in Ridgetown, Ontario using a single seed descent breeding method. The variety originated from a cross between the parent ‘OAC Prosper' and parent ‘AAC Malden' conducted in 2013. The variety was advanced from the F1 to the F4 generation where a single plant was selected based on maturity and agronomic traits in 2015. The variety was designated ‘SC 8518N' and tested in multiple trials from 2018 to 2021 in Ontario and Quebec.
Tests & Trials: The comparative trials of ‘OAC Stirling' were conducted in St. Thomas, Ontario during the 2022 and 2023 growing seasons. The trial included 3 replicates per variety arranged in an RCB design. Each plot consisted of a 9.14 meter row with approximately 300 plants per variety per year. Measured characteristics were based on 20 measurements per variety per year, except for seed weight which was based on a minimum of 3 measurements per variety per year. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.
Comparison tables for 'OAC Stirling' with reference varieties 'OAC Bruton' and 'OAC Kent'
Seed length (mm)
| 'OAC Stirling' | 'OAC Bruton' | 'OAC Kent' | |
|---|---|---|---|
| mean (2022) | 7.9 | 9.1 | 8.4 |
| std. deviation (2022) | 0.29 | 0.26 | 0.35 |
| mean (2023) | 7.5 | 8.7 | 8.2 |
| std. deviation (2023) | 0.31 | 0.29 | 0.27 |
Seed width (mm)
| 'OAC Stirling' | 'OAC Bruton' | 'OAC Kent' | |
|---|---|---|---|
| mean (2022) | 5.9 | 6.5 | 6.2 |
| std. deviation (2022) | 0.26 | 0.15 | 0.28 |
| mean (2023) | 5.6 | 6.1 | 5.9 |
| std. deviation (2023) | 0.25 | 0.31 | 0.33 |
Seed weight (grams per 100 seeds) (g)
| 'OAC Stirling' | 'OAC Bruton' | 'OAC Kent' | |
|---|---|---|---|
| mean (2022) | 19.0 | 26.6 | 19.4 |
| std. deviation (2022) | 0.26 | 0.41 | 0.45 |
| mean (2023) | 19.1 | 24.7 | 21.0 |
| std. deviation (2023) | 0.56 | 1.01 | 0.49 |
Click on image for larger view
Soybean: 'OAC Stirling' (left) with reference varieties 'OAC Bruton' (centre) and 'OAC Kent' (right)
Click on image for larger view
Soybean: 'OAC Stirling' (left) with reference varieties 'OAC Bruton' (centre) and 'OAC Kent' (right)
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