Table 1 Performance of N22, NH219 and IR64 under ambient and heat stress conditions
From: Characterization of a Nagina22 rice mutant for heat tolerance and mapping of yield traits
Treatment | Ambient Condition (38°C) | Heat stress condition (44°C) | % Reduction in trait value | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
Trait Name | Genotype | Mean | SD | Min | Max | Mean | SD | Min | Max | |
Plant height (cm) | N22 | 82.80 | 7.10 | 72.00 | 97.00 | 86.60 | 3.78 | 80.00 | 91.00 | −4.59 |
NH219 | 83.85 | 7.51 | 71.00 | 100.00 | 94.60 | 4.77 | 84.00 | 100.00 | −12.82** | |
No. of tillers | N22 | 13.05 | 3.41 | 7.00 | 20.00 | 9.80 | 2.94 | 6.00 | 15.00 | 24.90** |
NH219 | 15.55 | 4.31 | 10.00 | 26.00 | 12.30 | 4.42 | 7.00 | 22.00 | 20.90 | |
No. of panicles | N22 | 12.65 | 3.44 | 7.00 | 19.00 | 7.30 | 1.57 | 6.00 | 11.00 | 42.29** |
NH219 | 15.15 | 4.16 | 10.00 | 26.00 | 10.40 | 3.34 | 7.00 | 18.00 | 31.35** | |
Panicle length (cm) | N22 | 17.10 | 3.26 | 12.00 | 24.00 | 13.85 | 3.02 | 10.00 | 18.00 | 19.01** |
NH219 | 18.75 | 2.00 | 15.00 | 22.00 | 16.80 | 2.25 | 13.00 | 20.00 | 10.40* | |
Yield/plant (g) | N22 | 1.14 | 0.04 | 1.08 | 1.20 | 0.76 | 0.07 | 0.65 | 0.85 | 33.24** |
NH219 | 1.45 | 0.02 | 1.41 | 1.48 | 1.11 | 0.07 | 1.03 | 1.20 | 23.35** | |
Pollen viability (%) | N22 | 78.95 | 4.72 | 76.08 | 84.40 | 74.6 | 6.65 | 68.70 | 81.80 | 5.51 |
NH219 | 91.27 | 2.70 | 88.17 | 93.13 | 88.94 | 3.27 | 86.48 | 92.65 | 2.55 | |
Spikelet fertility (%) | IR64 | 91.22 | 0.20 | 91.00 | 91.37 | 72.43 | 1.81 | 84.09 | 87.50 | 20.60* |
N22 | 95.08 | 2.50 | 92.31 | 98.53 | 90.08 | 5.13 | 81.00 | 93.22 | 5.26 | |
NH219 | 96.49 | 2.01 | 93.55 | 98.33 | 95.95 | 3.13 | 91.21 | 100.00 | 0.55 | |
IR64 | 97.57 | 1.28 | 95.65 | 99.04 | 73.20 | 2.54 | 69.23 | 75.53 | 24.98** | |
Chl a/b | N22 | 4.50 | 0.86 | 3.68 | 5.26 | 2.91 | 1.10 | 1.66 | 4.02 | 35.36 |
NH219 | 4.02 | 0.79 | 3.18 | 4.92 | 3.11 | 0.62 | 2.57 | 3.82 | 22.60 | |
IR64 | 3.83 | 0.66 | 3.22 | 4.50 | 2.98 | 2.12 | 2.67 | 7.25 | 22.11 | |
RWC | N22 | 92.90 | 1.84 | 87.88 | 94.62 | 90.77 | 7.68 | 75.39 | 99.54 | 2.29 |
NH219 | 92.43 | 3.60 | 86.88 | 98.78 | 91.41 | 5.41 | 83.20 | 98.44 | 1.10 | |
IR64 | 91.19 | 5.83 | 80.95 | 98.73 | 90.3 | 4.04 | 87.03 | 99.51 | 0.98 | |
ETR | N22 | 28.43 | 6.29 | 21.70 | 38.80 | 21.85 | 10.22 | 6.70 | 35.50 | 23.13** |
NH219 | 25.35 | 2.24 | 23.50 | 29.00 | 21.4 | 2.31 | 18.90 | 25.30 | 15.58 | |
IR64 | 28.53 | 1.18 | 26.80 | 29.80 | 23.85 | 4.67 | 15.60 | 27.00 | 16.39* | |
Fv/Fm | N22 | 0.75 | 0.02 | 0.73 | 0.78 | 0.71 | 0.06 | 0.61 | 0.76 | 5.87 |
NH219 | 0.78 | 0.01 | 0.77 | 0.81 | 0.79 | 0.01 | 0.78 | 0.82 | −0.89 | |
IR64 | 0.78 | 0.01 | 0.77 | 0.79 | 0.69 | 0.01 | 0.77 | 0.79 | 12.02** | |