Variability and Heritability Studies in Rice (Oryza sativa L.) Under Coastal Salinity

Genetic parameters of variability and heritability of different characters were studied in 36 genotypes of rice. The maximum genotypic coefficient of variability and phenotypic coefficient of variability were observed for straw yield/plant, grain yield/plant, total biological yield/plant, number of fertile florets/panicle and number of branches/panicle. The heritability estimates were highest for days to 50% flowering, days to maturity and 1000 – grain weight. GA as % over mean were higher for number of branches/ panicle, straw yield/plant, total biological yield/plant and grain yield/plant will be useful for further breeding programme.