Table 3.
Yield traits, seed growth rate, and seed filling rate in heat-tolerant (HT1: ICCV07110; HT2: ICCV92944) and heat-sensitive (HS1: ICC14183; HS2: ICC5912) chickpea genotypes grown in control (25/15 °C) and heat stress (32/20 °C) environments.
| Traits | Control | Stressed | ||||||
|---|---|---|---|---|---|---|---|---|
| HT1 | HT2 | HS1 | HS2 | HT1 | HT2 | HS1 | HS2 | |
| Total dry weight plant–1 (TDW) | 13.1 ± 1.15a | 11.6 ± 1.13a | 12.1 ± 1.11a | 10.6 ± 1.13a | 9.5 ± 1.1b | 8.7 ± 0.89b | 4.56 ± 0.87c | 4.14 ± 0.84c |
| Seed yield plant–1 (SY) | 5.7 ± 0.56a | 5.1 ± 0.45a | 5.1 ± 0.36a | 4.8 ± 0.42a | 4.1 ± 0.51b | 3.7 ± 0.34b | 1.98 ± 0.22c | 1.34 ± 0.20c |
| Average seed weight (mg) (SW) | 106.7 ± 8.5a | 101.5 ± 8.7a | 103.5 ± 9.4a | 101.9 ± 8.5a | 78.5 ± 6.1b | 67.9 ± 7.3b | 40.1 ± 4.5c | 34.6 ± 3.9d |
| Average seed size (mm) (SS) | 6.1 ± 0.61a | 5.8 ± 0.58a | 5.6 ± 0.48a | 5.3 ± 0.41a | 4.6 ± 0.45b | 4.2 ± 0.39b | 2.24 ± 0.43c | 2.11 ± 0.18c |
| Pod number plant–1 (PN) | 20.4 ± 1.13a | 18.3 ± 1.11a | 16.7 ± 1.31b | 15.4 ± 1.21b | 14.3 ± 1.43bc | 12.8 ± 1.32c | 7.2 ± 1.17d | 6.92 ± 1.16d |
| Seed number 100 pods–1 (SN) | 103.4 ± 6.2a | 98.3 ± 6.1a | 91.3 ± 5.9b | 87.6 ± 6.5b | 78.9 ± 7.1c | 71.3 ± 6.8c | 35.3 ± 3.7d | 32.3 ± 2.9d |
| Harvest index (HI) | 0.43 ± 0.076a | 0.41 ± 0.056a | 0.39 ± 0.043bc | 0.37 ± 0.037c | 0.3 ± 0.019d | 0.27 ± 0.031d | 0.14 ± 0.021e | 0.12 ± 0.018e |
| Seed growth rate (mg seed–1 day–1) (SGR) | 7.6 ± 0.87a | 7.3 ± 0.65a | 7.1 ± 0.87a | 7.2 ± 0.59a | 5.7 ± 0.64b | 5.1 ± 0.71b | 2.9 ± 0.59c | 2.67 ± 0.43c |
| Seed fill duration (days) (SFD) | 23.1 ± 1.54a | 20.4 ± 1.37a | 21.3 ± 1.76a | 19.5 ± 1.35bc | 16.6 ± 1.54c | 15.1 ± 1.78c | 8.9 ± 1.55d | 8.65 ± 1.39d |
LSD (P < < 0.05) for genotypes x treatment interaction: TDW (2.3), SY (1.5), SW (10.2), SS (1.3), PN (2.1), SN (7.6), HI (0.083), SGR (1.13), SFD (2.11).
Values represent mean ± S.E. Different lower-case letters for each trait indicate significant variations (P < 0.05).