OAC Casey
| Denomination: | 'OAC Casey' |
|---|---|
| Botanical Name: | Glycine max |
| Applicant/Holder: |
University of Guelph Research Innovation Office Building #92, 50 Stone Road East Guelph, Ontario N1G 2W1 Canada |
| Breeder: |
Istvan Rajcan, University of Guelph, Guelph, Ontario |
| Agent in Canada: |
BioFlora Inc. 38723 Fingal Line R.R. #1 St. Thomas, Ontario N5P 3S5 Canada Tel: 519-317-7511 |
| Application Date: | 2020-03-04 |
| Provisional Protection:: | 2020-03-04 |
| Application Number: | 20-10113 |
Variety Description
Variety used for comparison: 'OAC Drayton'
Summary: When 50% of the plants are flowering, the terminal and lateral leaflets of 'OAC Casey' are wider than those of 'OAC Drayton'. When 95% of the pods are ripe, the plants of 'OAC Casey' are shorter than those of 'OAC Drayton'. At maturity, the seed of 'OAC Casey' is longer than that of 'OAC Drayton'. The seed weight of 'OAC Casey' is greater than that of 'OAC Drayton'. The hilum of 'OAC Casey' is imperfect yellow while that of 'OAC Drayton' is light brown.
Description:
HYPOCOTYL: medium to strong intensity of anthocyanin colouration
PLANT: food-grade type, indeterminate growth type, erect to semi-erect branch attitude, tawny pubescence on middle third of main stem, begins flowering early in the season, matures mid-season
LEAF: weak blistering, medium green upper side
TERMINAL LEAFLET: ovoid, medium size
LATERAL LEAFLET: pointed ovate, medium size
FLOWER: violet
POD: light to medium brown
SEED: medium sized, spherical flattened, yellow ground colour of testa
HILUM: imperfect yellow, funicle same colour as testa
Origin & Breeding History: 'OAC Casey' (experimental designation SeCan 15-16C) was developed at the University of Guelph in Guelph, Ontario using a single seed descent breeding method. The variety originated from a cross between the variety 'OAC Wallace' and the line DH20 conducted in 2010. The variety was advanced from the F1 to the F4 generation where a single plant was selected based on maturity and agronomic traits in 2011. The variety was designated SeCan 15-16C at the F8 generation in 2015 with breeder seed being established at the F4:10 generation in 2017.
Tests & Trials: The comparative trials of 'OAC Casey' were conducted in St. Thomas, Ontario during the 2020 and 2022 growing seasons. The trial included 3 replicates per variety in an RCB design. Each plot consisted of a 9.14 meter row with approximately 180 plants spaced 5 cm apart resulting in approximately 500 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 Casey' with reference variety 'OAC Drayton'
Terminal leaflet width (cm)
| 'OAC Casey' | 'OAC Drayton' | |
|---|---|---|
| mean (2020) | 6.8 | 6.2 |
| std. deviation (2020) | 0.69 | 0.45 |
| mean (2022) | 7.0 | 6.0 |
| std. deviation (2022) | 0.66 | 0.50 |
Lateral leaflet width (cm)
| 'OAC Casey' | 'OAC Drayton' | |
|---|---|---|
| mean (2020) | 7.3 | 6.2 |
| std. deviation (2020) | 0.89 | 0.51 |
| mean (2022) | 6.9 | 6.0 |
| std. deviation (2022) | 0.49 | 0.45 |
Plant height (when 95% of the pods are ripe) (cm )
| 'OAC Casey' | 'OAC Drayton' | |
|---|---|---|
| mean (2020) | 47.5 | 57.9 |
| std. deviation (2020) | 7.00 | 3.06 |
| mean (2022) | 46.7 | 57.8 |
| std. deviation (2022) | 6.16 | 5.66 |
Seed length (mm)
| 'OAC Casey' | 'OAC Drayton' | |
|---|---|---|
| mean (2020) | 7.9 | 7.2 |
| std. deviation (2020) | 0.27 | 0.19 |
| mean (2022) | 7.9 | 7.2 |
| std. deviation (2022) | 0.41 | 0.20 |
Seed weight (grams per 100 seeds) (g)
| 'OAC Casey' | 'OAC Drayton' | |
|---|---|---|
| mean (2020) | 17.2 | 15.3 |
| std. deviation (2020) | 0.49 | 0.40 |
| mean (2022) | 18.8 | 15.4 |
| std. deviation (2022) | 0.53 | 0.19 |
Click on image for larger view
Soybean: 'OAC Casey' (left) with reference variety 'OAC Drayton' (right)
Click on image for larger view
Soybean: 'OAC Casey' (left) with reference variety 'OAC Drayton' (right)
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