Studies on genetic variability for yield and yield contributing traits in local rice (Oryza sativa L.)

Abstract

The experiment was conducted with twenty four rice genotypes collected from local area of Maharashtra along with two check varieties in Kharif 2015-16 in randomize block design. Wide range of variability was present in the local lines of rice under study. The range of GCV and PCV was 5.76% to 24.79% and 2.62% to 24.34% respectively. The estimates of phenotypic, genotypic and environmental variances revealed that phenotypic variances were higher in magnitude over the respective genotypic variances for all the characters under study. PCV and GCV were high for number of filled spikelets per panicle and number of spikelets per panicle. The broad sense heritability ranged from 20.37% to 97.78%. High estimates of broad sense heritability was observed for number of filled spikelet per panicle, number of spikelet per panicle, days to maturity and plant height. The genetic advance and genetic advance as per cent of mean was ranged from 1.00% to 71.22% and 2.18% to 68.60% respectively. Heritability along with genetic advance is more useful for selection than the heritability alone.