Stability analysis using thermo-sensitive genic male sterility (TGMS) system in rice (Oryza sativa L.)

Forty-eight hybrid combinations were studied alongwith their 14 parents and two standard checks for their stability performance at three locations in Andhra Pradesh for eight quantitative characters. The analysis of variance revealed that the genotypes and environments were significant for all the characters except number of spikelets per panicle, spikelet fertility and 100-grain weight for environments. The G x E interactions were significant for the six characters viz., days to 50% flowering, plant height, number of productive tillers per plant, panicle length, number of spikelets per panicle and grain yield per plant, and non significant for the remaining two characters i.e. spikelet fertility and 100-grain weight. Therefore, stability analysis was not carried out for these two characters. Mean sum of squares due to environment linear was found significant for days to 50% flowering, plant height, number of productive tillers per plant, panicle length and grain yield per plant. Linear component of G x E interaction was predominant for days to 50% flowering, plant height, number of productive tillers per plant, particle length, number of spikelets per panicle and grain yield per plant. Non-linear component was found significant for all the traits studied. The hybrids DRR 7S x EPLT 109R, DRR 22S x KMR 3R, DRR 17S x BCW 56R, DRR 20S x KMR 3R and DRR 1S x 1R 58025B had average stability and high per se performance for yield and yield contributing characters.