CDC Tollefson
| Denomination: | 'CDC Tollefson' |
|---|---|
| Previously Proposed Denomination: | 'CDC 4947-2' |
| Botanical Name: | Pisum sativum |
| Applicant/Holder: |
University of Saskatchewan Crop Development Centre 4D36 Agriculture Building, 51 Campus Drive Saskatoon, Saskatchewan S7N 5A8 Canada |
| Breeder: |
Tom Warkentin, University of Saskatchewan, Saskatoon, Saskatchewan |
| Application Date: | 2019-05-31 |
| Provisional Protection:: | 2019-05-31 |
| Application Number: | 19-9928 |
| Grant of Rights Date: | 2023-09-12 |
| Certificate Number: | 6901 |
| Grant of Rights Termination Date: | 2043-09-12 |
Variety Description
Varieties used for comparison: 'CDC Amarillo', 'CDC Inca', 'CDC Spectrum', 'CDC 4999-5' and 'CDC 5301-1'
Summary: The pod of 'CDC Tollefson' is longer than those of 'CDC Amarillo' and 'CDC Inca'. The pod curvature for 'CDC Tollefson' is weak while the pod curvature of 'CDC Inca' is absent or very weak. The hilum of 'CDC Tollefson' is darker in colour than the testa while those of 'CDC Amarillo', 'CDC Inca' and 'CDC Spectrum' are the same colour as the testa. The seed weight for 'CDC Tollefson' is greater than the seed weight of the reference varieties.
Description:
PLANT: field type, no anthocyanin colouration, green foliage, flowers mid-season
STEM: no anthocyanin colouration of axil, no fasciation, long, medium number of nodes up to and including the first fertile node
LEAF: leaflets absent
STIPULE: long, broad, small to medium size, medium length from axil to tip, lobe below axil short, medium to dense flecking
FLOWER: maximum of two per node
STANDARD: white, medium width, level to moderately arched base, absent or very weak to weak undulation
UPPER SEPAL: medium to broad , acuminate apex
POD: medium to long, narrow to medium width, entire parchment, weak curvature, light to medium green, medium number of ovules
IMMATURE SEED: medium green
SEED: ellipsoid, simple starch grains, yellow cotyledon, medium weight, matures mid-season
HILUM: colour darker than testa
Origin & Breeding History: 'CDC Tollefson' (experimental designation CDC 4947-2) originated from the cross between MP1899 and 2847-21, with a subsequent cross to CDC 2648-21. The cross was conducted in 2011 at the Crop Development Centre at the University of Saskatchewan, Saskatoon, Saskatchewan. The variety was developed from a single plant selection from the F2 population with 19 F9 sub-lines selected to establish breeder seed in 2019. 'CDC Tollefson' was selected based on grain yield, days to maturity, vine length, resistance to lodging, seed weight, resistance to seed coat breakage, disease resistance, crude protein concentration and cooking time.
Tests & Trials: The comparative tests and trials for 'CDC Tollefson' were conducted at the Sutherland Field Site of the Crop Development Centre of the University of Saskatchewan, Saskatoon, Saskatchewan during the 2019 and 2021 growing seasons. The trials were arranged in a RCB design consisting of 2 replications per variety. Each replicate consisted of 3 rows spaced 30 cm apart, with a row length of 3.66 metres and a planting density of 84 seeds per square metre. The measured characteristics were based on 20 measurements per variety per year, except for seed weight which was based on 8 measurements per variety per year. The mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.
Comparison tables for 'CDC Tollefson' with reference varieties 'CDC Amarillo', 'CDC Inca', 'CDC Spectrum', 'CDC 4999-5' and 'CDC 5301-1'
Pod length (cm)
| 'CDC Tollefson' | 'CDC Amarillo' | 'CDC Inca' | 'CDC Spectrum' | 'CDC 4999-5' | 'CDC 5301-1' | |
|---|---|---|---|---|---|---|
| mean 2019 | 6.9 | 6.5 | 6.4 | 6.9 | 6.8 | 7.4 |
| std. deviation 2019 | 0.4 | 0.3 | 0.5 | 0.4 | 0.5 | 0.4 |
| mean 2021 | 7.0 | 6.0 | 6.3 | 6.2 | 6.2 | 6.8 |
| std. deviation 2021 | 0.6 | 0.5 | 0.5 | 0.7 | 0.4 | 0.5 |
Pod width (cm)
| 'CDC Tollefson' | 'CDC Amarillo' | 'CDC Inca' | 'CDC Spectrum' | 'CDC 4999-5' | 'CDC 5301-1' | |
|---|---|---|---|---|---|---|
| mean 2019 | 1.3 | 1.2 | 1.3 | 1.2 | 1.2 | 1.3 |
| std. deviation 2019 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| mean 2021 | 1.4 | 1.3 | 1.4 | 1.2 | 1.2 | 1.4 |
| std. deviation 2021 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
Seed weight (grams per 100 seeds)
| 'CDC Tollefson' | 'CDC Amarillo' | 'CDC Inca' | 'CDC Spectrum' | 'CDC 4999-5' | 'CDC 5301-1' | |
|---|---|---|---|---|---|---|
| mean 2019 | 25.1 | 23.9 | 23.3 | 24.3 | 23.9 | 23.7 |
| std. deviation 2019 | 0.3 | 0.6 | 0.5 | 0.5 | 1.3 | 1.1 |
| mean 2021 | 24.4 | 22.6 | 22.0 | 23.7 | 23.3 | 23.7 |
| std. deviation 2021 | 0.4 | 0.4 | 0.4 | 0.5 | 0.8 | 0.3 |
Click on image for larger view
Pea: 'CDC Tollefson' (top centre) with reference varieties 'CDC 5301-1' (top left), 'CDC 4999-5' (top centre left), 'CDC Meadow' (top centre right), 'CDC Amarillo' (top right), 'CDC Inca' (bottom left) and 'CDC Spectrum' (bottom right)
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