Genetic variability and trait association studies for gall midge incidence, yield and its traits in rice (Oryza sativa L.) genotypes

Abstract

Variability and trait association studies were investigated in 18 rice (Oryza sativa L.) genotypes with two replications in a RBD design during kharif, 2017 at Agricultural Research Station, Kunaram. The traits, plant height, number of productive tillers per m2 and number of grains per panicle showed high heritability coupled with high genetic advance values indicating these traits were predominantly governed by the additive genes. Grain yield had positively correlated with days to 50% flowering, plant height and number of grains per panicle, and negatively correlated with gall midge incidence at both genotypic and phenotypic levels suggesting that genotypes with longer duration, more plant height and good number of grains panicle with relatively very less silver shoots contribute for more grain yield.