Market Class: Yellow Pea
Year Registered: 2021
Sub-licensed Outside of SK: SeCan
International Distribution Rights: No
Breeder: Dr. Tom Warkentin, Crop Development Centre, University of Saskatchewan, Saskatoon, SK
Plant Breeders’ Rights: PBR ’91
Description
CDC Tollefson is a mid-maturing, very high yielding yellow pea. After 7 years of testing in the Co-op and Regional Variety trials in Saskatchewan, it was the highest yielding variety in the south yielding 109% of the check variety CDC Amarillo. It also yields high in the north at 108% of the check. This represents a 4 – 6% yield increase vs. the current CDC varieties CDC Inca, CDC Spectrum and CDC Lewochko. It has very good standability; similar to CDC Amarillo and CDC Spectrum and medium-long vine length. It has improved disease resistance vs. CDC Spectrum, CDC Lewochko or CDC Inca and is rated moderately resistant to Fusarium root rot. It has good seed characteristics and is rated good for resistance to seed coat breakage, dimpling and greenness (Table 1). Protein is similar to CDC Amarillo. CDC Tollefson has PBR’91 protection.
Statistical analysis of 8 years of long-term RVT data ranked CDC Tollefson 2nd from the top for yield in the south and 7th in the north among 16 historical and new yellow pea varieties (Figure 1).
Strengths
- High yield in both north & south geographies
- Improved resistance to Fusarium root rot and mycosphaerella blight – better than CDC Inca, CDC Spectrum or CDC Lewochko
- Good seed characteristic package – rated good for:
- Resistance to seed coat breakage;
- Resistance to dimpling;
- Greenness (less green coloration) – better than CDC Inca or CDC Spectrum
- Medium-long vine length; taller than CDC Amarillo or AAC Lacombe
- Very good lodging resistance; similar to CDC Spectrum and CDC Amarillo, better than CDC Inca or CDC Meadow
- Powdery mildew resistance
Neutral
- Medium seed size (similar to CDC Amarillo)
- Medium maturity
- Moderate protein (similar to CDC Amarillo)
Table 1: Agronomic performance of yellow pea varieties from Co-op and Regional Trials in Saskatchewan
| Variety | Year Registered | Years Tested | Yield (% Amarillo) | Relative Maturity | Lodging (1-9)2 | Vine Length (cm) | Resistance to: | Seed Weight (g/1000) | Protein % vs. CDC Amarillo | ||||||
| Area 1, 2 & South 31 | Area North 3 & 41 | Mycosphaerella Blight3 | Powdery Mildew | Fusarium Root Rot | Seed coat breakage | Seed coat dimpling4 | Greeness5 | ||||||||
| CDC Amarillo | 2012 | 14 | 100 | 100 | M | 3.5 | 85 | 4.5 | R | MR | F | F | G | 230 | 23 |
| AAC Aberdeen | 2019 | 5 | 108 | 107 | M | 3.5 | 85 | 4.5 | R | I | F | F | G | 250 | -1.1 |
| AAC Beyond | 2021 | 5 | 106 | 108 | E | 4.5 | 80 | 5 | R | MR | F | F | G | 220 | 0.3 |
| Boost | 2022 | 4 | 102 | 101 | M | 4.5 | 90 | 4.5 | R | MR | G | G | G | 230 | 1.2 |
| CDC Boundless | 2023 | 4 | 109 | 105 | M | 3 | 90 | 4.5 | R | MR | G | G | G | 230 | 0.8 |
| CDC Canary | 2017 | 10 | 99 | 100 | E | 3.5 | 85 | 4.5 | R | I | G | F | F | 230 | 0.1 |
| Caphorn | 2023 | 4 | 100 | 98 | M | 4 | 80 | 5 | R | MR | F | G | G | 260 | 1.7 |
| AAC Carver | 2014 | 7 | 102 | 100 | E | 4 | 85 | 5 | R | I | G | F | G | 240 | -1.3 |
| AAC Chrome | 2017 | 7 | 106 | 104 | M | 4.5 | 75 | 4.5 | R | I | G | G | G | 240 | -1 |
| CDC Citrine | 2022 | 6 | 108 | 110 | M | 4 | 85 | 4 | R | MR | G | G | G | 220 | 0.3 |
| CDC Engage | 2023 | 4 | 107 | 107 | M | 3.5 | 85 | 4.5 | R | I | G | G | G | 240 | 0.7 |
| CDC Hickie | 2021 | 7 | 107 | 106 | M | 3.5 | 85 | 4.5 | R | MR | G | G | G | 230 | 0.5 |
| CDC Inca | 2015 | 12 | 104 | 102 | M | 4 | 85 | 4.5 | R | I | G | G | F | 230 | -0.6 |
| AAC Julius | 2021 | 5 | 110 | 105 | E | 4 | 85 | 4.5 | R | MR | G | G | G | 210 | 0.4 |
| CDC Lewochko | 2018 | 10 | 104 | 104 | M | 3.5 | 90 | 4.5 | R | I | G | G | G | 230 | 0.9 |
| AAC McMurphy | 2023 | 3 | 102 | 101 | M | 3.5 | 85 | 4.5 | R | MR | F | F | G | 250 | 0.6 |
| CDC Meadow | 2006 | 12 | 93 | 90 | E | 4 | 85 | 5 | R | I | G | G | G | 220 | -0.5 |
| AAC Planet | 2022 | 3 | 107 | 102 | M | 3.5 | 90 | 4.5 | R | MR | G | G | G | 220 | 1.2 |
| AAC Profit | 2019 | 6 | 103 | 109 | M | 4.5 | 90 | 4.5 | R | I | F | G | G | 230 | 0.8 |
| CDC Spectrum | 2016 | 12 | 105 | 103 | M | 3.5 | 85 | 4.5 | R | I | G | G | F | 240 | 0.7 |
| CDC Tollefson | 2021 | 7 | 109 | 108 | M | 3 | 90 | 4 | R | MR | G | G | G | 240 | -0.3 |
| CDC 5791 | 2024 | 4 | 107 | 103 | M | 4 | 90 | 4.5 | R | MR | G | G | G | 250 | 0.6 |
| CDC 5845 | 2024 | 4 | 108 | 107 | M | 3.5 | 90 | 4 | R | MR | G | G | G | 240 | 0.6 |
Source: Varieties of Grain Crops (SaskSeed Guide) and Crop Development Centre, U of S
1Area 1: Brown soil zone; Area 2: Dark brown; Area 3: Black; Area 4: Dark grey
2Lodging score: 1 = Upright; 9 = Completely lodged
3Mycosphaerella blight score: 1 = No disease, 9 = Completely blighted
4Seed coat dimpling: Very Good = 0-5%; Good = 6-20%; Fair = 21-50%
5Greenness: Good = 0-15%; Fair = 16-40%
Figure 1. Relative yield ranking of yellow pea varieties from 8 years of RVT data in SK in the south (left) and north (right).
