Table 4.
Comparison of the impact of warm ambient temperatures in the three studied cultivars.
| Phenotypes | DH12075 | Topas | Westar |
|---|---|---|---|
| Number of produced flowers (HT) | Sensitive (higher) | Resistant (~unaffected) | Intermediate |
| Flowering time (HT) | Sensitive (longer) | Resistant (slightly reduced) | Intermediate (slightly longer) |
| Apical dominance (HT) | Reduced | Unaffected | Reduced |
| Pollen viability | ~95% Viable | ~95% Viable | ~95% Viable |
| Number of ovules per pistil (HT) | Unaffected | Unaffected | Mild reduction |
| Fertilization rate (HT) | 48% | 54% | 45% |
| Seed abortion (HT) | <1% | 15% | 12% |
| Defective embryos (HT) | 32% | 19% | 25% |
| PHS | Intermediate (3%–13%) | Sensitive (30%–73%) | Resistant (4%–8%) |
| Viable seed set (HT) | ~1 seed per silique | ~6 seeds per silique | ~2 seeds per silique |
| Seed quality (MT)—GSL | +5% | +2% | +2% |
| Seed quality (MT)—Oil | −6% | −2% | −5% |
| Seed weight (MT) | Mild reduction | Mild reduction | No difference |
| Seed germination | Delayed | Unaffected | Delayed |