59-05-032 Proceeding

66 Proceedings of the Princess Maha Chakri Sirindhorn Congress Table 1 FREQUENCY AND SPECTRUMOF VIABLE MUTATIONS INM2 GENERATION Treatment M2 population Spectrum of mutation Total frequency of mutation (%) Leaf type Plant type Panicle and seed type Early maturity 100Gy 221 0.45 0.45 0.90 - 1.80 200Gy 226 0.44 0.88 1.32 - 2.64 300Gy 238 0.84 1.26 1.26 0.42 3.78 400GY 229 0.87 0.44 2.18 0.87 4.36 500Gy 215 0.93 0.93 1.86 - 3.72 600GY 219 0.46 0.91 0.91 - 2.28 700Gy 207 - 0.48 0.48 - 0.96 Total 1546 Mean 0.57 0.76 1.27 0.18 2.79 Table 2 YIELD CONTRIBUTING TRAITS AMONG SELECTED M2 MUTANTS Control/Mutant Doses Plant Height (cm) Stem Width (cm) Panicle Length (cm) Panicle Width (cm) Seeds per Plant 100 Seed Weight (g) Yield per Plant (g) Days to Maturity Control 0 Gy 276.2 7.5 28.8 19.2 624 1.98 12.36 133 Narrow leaf 300 Gy 285.7 6.2 26.7 20.2 780 1.50 11.70 130 Broad leaf 600 Gy 265.9 9.5 27.3 20.5 796 2.03 16.16 133 Early 400 Gy 282.0 6.8 25.5 19.3 506 1.91 9.66 125 Dwarf 300 Gy 162.7 8.0 18.0 13.2 803 1.44 11.56 128 Tall 500 Gy 345.5 7.0 30.0 18.0 674 1.80 12.13 135 Compact panicle 300 Gy 293.5 9.3 22.2 19.0 1254 1.63 20.44 137 Small seed 200 Gy 280.5 8.2 19.5 20.5 1497 0.98 14.67 133 Bold seed 400 Gy 286.3 9.0 28.0 20.8 645 2.51 16.19 134 High yielding 400 Gy 318.6 10.5 35.7 30.5 1542 1.63 25.13 134 CV% 16.86 16.64 19.93 21.19 41.26 23.58 31.55 2.687 SE 14.91 0.432 1.649 1.348 119.0 0.130 1.496 1.123 CD (p = 0.05) 33.73 0.976 3.730 3.050 269.2 0.294 3.385 2.541 CD (p = 0.01) 48.46 1.402 5.360 4.382 386.8 0.422 4.863 3.651