Siena
| Denomination: | 'Siena' |
|---|---|
| Botanical Name: | Glycine max |
| Applicant/Holder: |
Sevita Genetics 11451 Cameron Rd. Inkerman, Ontario K0E1J0 Canada |
| Breeder: |
Mark Macduff, Sevita Genetics, Inkerman, Ontario |
| Application Date: | 2024-02-22 |
| Provisional Protection: | 2024-02-22 |
| Application Number: | 24-11614 |
| Grant of Rights Date: | 2025-11-05 |
| Certificate Number: | 7492 |
| Grant of Rights Termination Date: | 2045-11-05 |
Variety Description
Varieties used for comparison: 'Rowan' and 'Candor'
Summary: When the cotyledons are fully unfolded, the anthocyanin colouration of the hypocotyl of ‘Siena' is absent whereas it is present for both the reference varieties. When 50% of the flowers are open, the branch attitude of ‘Siena' is erect to semi-erect whereas it is semi-erect for ‘Candor'. On the middle third of the main stem, the pubescence of ‘Siena' is grey whereas it is light tawny for ‘Rowan'. The flower of ‘Siena' is white while that of both the reference varieties is violet. At maturity, the seed of ‘Siena' is medium size whereas that of ‘Candor' is large. The one hundred seed weight for ‘Siena' is less than both reference varieties. The seed of ‘Siena' is spherical whereas that of ‘Candor' is spherical flattened. The plants of ‘Siena' mature later than the plants of the reference varieties.
Description:
HYPOCOTYL: anthocyanin colouration absent
PLANT: indeterminate growth type, erect to semi-erect branch attitude, grey pubescence on middle third of main stem, begins flowering late season, matures late to very late season
LEAF: pointed ovate lateral leaflet
FLOWER: white
POD: light brown
SEED: medium size, spherical, yellow ground colour of testa
HILUM: yellow
Origin & Breeding History: 'Siena' (experimental designations SVX21T2S29, SV150518Z-1/3/4M) originated from a cross between the varieties 'S23-T5' and 'IA2102RA12' conducted in 2015 in Inkerman, Ontario using the modified individual pedigree selection method of plant breeding. From 2015 to 2017, four generations were advanced between Guanacaste, Costa Rica and Inkerman, Ontario by single plant selection. Selection criteria included yield, maturity, lodging resistance and disease resistance. 'Siena' was selected at the F4 generation. Breeder seed was produced from F8 lines in 2022.
Tests & Trials: The comparative trials for 'Siena' conducted in Saint-Césaire, Québec during the 2023 and 2024 growing seasons. Trials were planted in a RCB design and consisted of 2 replicates for each variety. Plots consisted of 2 rows, 5 metres in length and a row spacing of 76 cm. The trials consisted of 350 plants per variety. Measurements were taken from 20 plants or parts of 20 plants of each variety per year except for the seed weight with 10 measurements per variety per year. Mean differences were significant at the 5% probability level based on a Student's t-test.
Comparison tables for 'Siena' with reference varieties 'Rowan' and 'Candor'
Seed weight (grams per 100 seeds) (g)
| 'Siena' | 'Rowan' | 'Candor' | |
|---|---|---|---|
| mean 2023 | 21.7 | 23.4 | 32.2 |
| std. deviation 2023 | 0.27 | 0.27 | 0.42 |
| mean 2024 | 20.3 | 21.3 | 27.7 |
| std. deviation 2024 | 0.40 | 0.35 | 0.44 |
Number of days to maturity (from planting to maturity)
| 'Siena' | 'Rowan' | 'Candor' | |
|---|---|---|---|
| 2023 | 136 | 131 | 133 |
| 2024 | 140 | 131 | 135 |
Click on image for larger view
Soybean: 'Siena' (centre) with reference varieties 'Rowan' (left) and 'Candor' (right)
Click on image for larger view
Soybean: 'Siena' (centre) with reference varieties 'Rowan' (left) and 'Candor' (right)
Click on image for larger view
Soybean: 'Siena' (above) with reference varieties 'Rowan' (middle) and 'Candor' (bottom)
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