Table 10.
Effect of varying heat stress on pods and seed weight/plant in heat-tolerant (T) and heat-sensitive (S) genotypes grown under controlled environment.
| Temperature | Pods/plant | Seed weight/plant |
|---|---|---|
| 25/15°C | ||
| IG3745 (T) | 117.4 ± 6.9a | 3.98 ± 0.67a |
| FLIP2009 (T) | 123.4 ± 7.1a | 4.11 ± 0.73a |
| IG2849(S) | 80.5 ± 7.7c | 2.84 ± 0.76b |
| IG4242(S) | 78.4 ± 6.0d | 2.76 ± 0.72b |
| 35/25°C | ||
| IG3745(T) | 89.4 ± 7.3b | 2.56 ± 0.58b |
| FLIP2009(T) | 93.2 ± 6.8b | 2.88 ± 0.61b |
| IG2849(S) | 38.5 ± 5.8e | 1.13 ± 0.56c |
| IG4242(S) | 40.4 ± 4.7e | 1.02 ± 0.34c |
| 38/28°C | ||
| IG3745 (T) | 72.4 ± 6.7c | 1.56 ± 0.34c |
| FLIP2009 (T) | 75.2 ± 7.2c | 1.43 ± 0.42c |
| IG2849(S) | 0 | 0 |
| IG4242(S) | 0 | 0 |
| 40/30°C | ||
| IG3745(T) | 27.5 ± 6.9f | 0.78 ± 0.21d |
| FLIP2009(T) | 22.6 ± 6.1f | 0.64 ± 0.25d |
| IG2849(S) | 0 | 0 |
| IG4242(S) | 0 | 0 |
| LSD (P < 0.05) (genotypes × treatment Interaction) | 8.2 | 0.79 |
The plants were initially grown under outdoor conditions and moved to controlled environment at the time of flowering initiation (Mean ± SE). Similar letters in a vertical column indicate no significant difference from each other. LSD, least significant difference.