Genetic parameters and character association studies in rice (Oryza sativa L.)

Abstract

The genotypic coefficient of variation (GCV), phenotypic coefficient of variation (PCV), heritability, genetic advance, correlation and direct and indirect effect of different yield and yield attributing traits of 36 rice genotypes were studied. Among the traits number of productive tillers and number of total tillers had high genotypic and phenotypic coefficient of variation. High positive correlation was found for the traits viz., panicle weight, number of grains per panicle and number of filled grains with single plant yield. But grain length, grain breadth and seed weight had high negative correlation with single plant yield. Path coefficient analysis showed that number of productive tillers, days to maturity and grain weight had high direct effect on grain yield per plant. Among the different traits studied, maximum indirect effect on grain yield was found with total tillers per plant followed by days to maturity. Here priority should be given for all these characters during selection for the improvement of grain yield.