Genetic variability and frequency distribution studies for yield in OsPSTOL1 gene introgressed segregating populations of rice (Oryza sativa L.)

During rabi 2019, a field experiment was conducted with F3 populations of two crosses viz., Anna(R) 4 × IR 64 Pup1 and Anna(R) 4 × Samba Mahsuri Pup1 raised in non replicated trial at at Agricultural College and Research Institute, Killikulam and the observation was recorded for eight biometrical traits. High magnitude of variation in the experimental material of the study is reflected by high values of mean and range for all the characters studied. The results indicated that, high phenotypic coefficient of variation was observed as compared to genotypic coefficient of variation, suggesting the environmental influence on the expression of traits and heritability is high for most of the characters. The F3 populations of Anna(R) 4 × IR 64 Pup1 exhibited moderate PCV and GCV for single plant yield, number of productive tillers per plant, number of filled grains per panicle, number of tillers per plant and Anna(R) 4 × Samba Mahsuri Pup1 exhibited high PCV and GCV for single plant yield indicated that high variability among the lines. The F3 populations of Anna(R) 4 × IR 64 Pup1 showed high heritability coupled with high genetic advance as per cent of mean for number of tillers per plant, number of productive tillers per plant, number of filled grains per panicle and single plant yield and Anna(R) 4 × Samba Mahsuri Pup1 for number of productive tillers, panicle length, number of tillers per plant, hundred seed weight, days to fifty per cent flowering, and single plant yield which showed that these characters were controlled by additive gene effects and phenotypic selection for these characters were likely to be effective.