Genetic Variability Studies in Genetically Diverse Non-basmati Local Aromatic Genotypes of Rice (<i>Oryza sativa</i> (L.))

Abstract

An investigation was carried out to know the extent of genetic variability present in the local non-basmati aromatic genotypes of rice. The experiment was conducted in randomized complete block design with two replications during Kharif 2010 at Agricultural Research station Mugad, UAS Dharwad. Totally fourty two genetically diverse genotypes were considered for the study and analysis of variance was found to be significant for all the traits, indicate that there is existence of genetic variability for all the traits varying from lower to higher coefficients. The results found that the higher values of genotypic and phenotypic coefficient of variability was observed for plant height, number of tillers per plant, number of productive tillers per plant, panicle weight, grain length, test weight, iron and zinc content and grain yield per plant. The moderate genotypic and phenotypic coefficients of variance were recorded for panicle length, grain breadth and L/B ratio. The days to 50 per cent flowering had recorded lower values of genotypic and phenotypic variance. High heritability with high genetic advance was observed for all traits except days to 50 per cent flowering. All traits were found to be higher values of variance and selection for such traits will be practised based on phenotypic observation.