Market Class: Yellow Pea
Year Released to Select Seed Growers: 2018
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:
Description
CDC Lewochko is a high yielding mid-maturing yellow cotyledon, semi-leafless field pea variety that has very good seed characteristics. In 10 years of testing in the Co-op and Regional trials in Saskatchewan, CDC Lewochko yielded 104% of the check variety CDC Amarillo (Table 1). CDC Lewochko has the highest protein among the yellow pea varieties currently available (+0.9% vs. CDC Amarillo). CDC Lewochko has PBR’91 protection. CDC Lewochko ranks high for yield stability.
Statistical analysis of 8 years of long-term RVT data ranked CDC Lewochko 7th from the top for yield in the south and 6th in the north among 16 historical and new yellow pea varieties (Figure 1).
Strengths
- Good yield in both north and south geographies
- Rated high for yield stability
- Improved seed characteristic package – rated good for:
- Resistance to seed coat breakage
- Resistance to dimpling (better than CDC Amarillo)
- Shape (round)
- Greenness (less green coloration, better than CDC Inca or CDC Spectrum)
- Highest protein for yellow pea varieties currently available
- Medium-long vine length, taller than CDC Amarillo
- 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
- Fair resistance to Mycosphaerella blight and Fusarium root rot
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)** | Vine Length (cm) | Resistance to: | Seed Weight (g/1000) | Protein % vs. CDC Amarillo | ||||||
| Area 1, 2 & South 3* | Area North 3 & 4* | 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)
*Area 1: Brown soil zone; Area 2: Dark brown; Area 3: Black; Area 4: Dark grey
**Lodging score: 1 = Upright; 9 = Completely lodged
***Mycosphaerella blight score: 1 = No disease, 9 = Completely blighted
****Seed coat dimpling: Very Good = 0-5%; Good = 6-20%; Fair = 21-50%
*****Greenness: Good = 0-15%; Fair = 16-40%
CDC Lewochko is a new variety with limited certified seed coming available in 2022. This variety is showing promising performance over 5 years of testing in the Regional Variety Trials (RVTs). Its high protein will ensure it is sought after by pea processing companies. In 55 site-years of RVT data, CDC Lewochko ranked 4th overall in statistical analysis of 10 years of long-term RVT data (Figure 1).
CDC Lewochko ranked in the top 3 varieties at Glaslyn, Kamsack and Meath Park. In Hodgeville, it ranked 6th however yield was significantly higher than AAC Carver, AAC Lacombe, Abarth, CDC Amarillo, CDC Athabasca, CDC Golden, CDC Meadow and CDC Saffron. Statistical analysis showed that higher-ranking varieties did not yield significantly higher than CDC Lewochko. This was also true at several other locations where CDC Lewochko ranked lower than the top three. Kamsack was a particularly good location where CDC Lewochko was significantly better than most other yellow pea varieties. Only AAC Chrome was significantly better than CDC Lewochko at this site.
Figure 1. Relative yield ranking of yellow pea varieties from 8 years of RVT data in SK in the south (left) and north (right).
