Market Class: Black Bean
Year Registered: 2015
Date of Broad Release (off-tender): April 1, 2018
Breeder: Dr. Kirstin Bett, Crop Development Centre, University of Saskatchewan
Plant Breeders’ Rights ’91
Description
CDC Blackstrap is a high yielding, indeterminate black bean with medium maturity that is well-adapted to Saskatchewan. This variety was registered in 2015 and marketed through an exclusive, closed-loop tender until April 1, 2018, at which time it became widely available.
In eight years of testing in the dry bean narrow-row trials in the co-op and regional trials in Saskatchewan, CDC Blackstrap yielded 122% of CDC Pintium under irrigation and 120% in dryland conditions. It was the highest yielding variety in the dryland trials compared to other black varieties, as well as pintos and navy beans. CDC Blackstrap is well-adapted for Saskatchewan and has shown promising performance in solid seeded, straight combined, dryland production. This variety is protected by PBR’91.
Strengths
- High yield
- Good performance in dryland production
- Earlier maturity than CDC Jet or CDC Superjet
- Good pod clearance – suitable for straight combining
- Fewer ‘stone seeds’ than CDC Jet
Neutral
- Good lodging scores, similar to the check CDC Pintium
- Appropriate seed size and nice shape
Weaknesses
- Susceptible to Anthracnose races 73 and 105
Table 1: Dry Bean Agronomic Performance From Narrow-Row Co-op and Regional Trials in Saskatchewan
| VARIETY | YEARS TESTED* | PBR STATUS | MARKET CLASS | YIELD % CDC PINTIUM | DAYS TO FLOWER | MATURITY** | POD CLEARANCE (%)*** | GROWTH HABIT**** | SEED WEIGHT (G/1000) | MARKET COMMENTS | |
| IRRIGATION | DRYLAND | ||||||||||
| CDC PINTIUM | 17 | – | PINTO | 100 | 100 | 50 | EARLY | 85 | I | 350 | REGULAR DARKENING TYPE |
| ISLAND | 11 | – | PINTO | 122 | 111 | 55 | MEDIUM | 79 | II | 355 | REGULAR DARKENING TYPE |
| CDC MARMOT | 8 | – | PINTO | 108 | 108 | 50 | EARLY | 80 | I | 367 | REGULAR DARKENING TYPE |
| CDC WM-2 | 12 | PBR ‘91 | PINTO | 118 | 106 | 52 | EARLY | 79 | II | 365 | SLOW DARKENING TYPE |
| CDC BLACKSTRAP (2921-14) | 8 | PBR ‘91 | BLACK | 122 | 120 | 53 | MEDIUM | 85 | II | 195 | WELL-ADAPTED FOR SK & DRYLAND PRODUCTION |
| CDC JET | 17 | – | BLACK | 110 | 98 | 58 | LATE | 85 | II | 170 | LATE MATURING FOR SK |
| CDC SUPERJET | 7 | – | BLACK | 125 | 108 | 58 | LATE | 85 | II | 170 | LATE MATURING FOR SK |
| AC BLACK DIAMOND | 7 | – | SHINY BLACK | 102 | 94 | 54 | MEDIUM | 70 | II | 250 | |
Source: Varieties of Grain Crops (SaskSeed Guide) and CDC Pulse Crop Breeding Group
*Co-op and Regional trials grown in narrow rows in Saskatchewan. Direct comparison to CDC Pintium since 2002.
**% Maturity ratings based on E = 100 days; L = 110 days for planting to swathing maturity
***Pod Clearance: percentage of pods that completely clear the currerbar at the time of swathing (~4 cm)
****Growth habit: I = Determinate bush; II = Indeterminate bush; III = Indeterminate vine
Table 2: Hydration Data for CDC Blackstrap vs. Black Bean Check Varieties
| VARIETY | LOCATION | DRY WEIGHT (50 SEEDS) | # OF HARD SEEDS | WEIGHT OF HARD SEEDS | # OF PARTIALLY SOAKED SEEDS | WEIGHT OF PARTIALLY SOAKED SEEDS | # OF FULLY SOAKED SEEDS | WEIGHT OF FULLY SOAKED SEEDS | H-C* |
|---|---|---|---|---|---|---|---|---|---|
| CDC BLACKCOMB | 1 | 9.48 | 2 | 0.70 | 1 | 0.18 | 47 | 19.70 | 2.19 |
| CDC JET | 1 | 9.73 | 15 | 3.05 | 3 | 1.27 | 32 | 12.90 | 2.08 |
| CDC BLACKSTRAP | 1 | 11.27 | 0 | — | 5 | 2.06 | 45 | 21.54 | 2.14 |
| CDC BLACKCOMB | 2 | 8.11 | 1 | 0.15 | 3 | 1.15 | 46 | 16.98 | 2.28 |
| CDC JET | 2 | 8.08 | 32 | 5.54 | 4 | 1.08 | 14 | 4.87 | 2.11 |
| CDC BLACKSTRAP | 2 | 9.44 | 0 | — | 4 | 1.12 | 46 | 18.94 | 2.18 |
Source: Crop Development Centre, U of S
*H-C = Hydration Coefficient = (fully soaked seed weight*50 seeds)/(dry weight*# of fully soaked seeds)
Average of 3 reps at each location.
