Author(s):

N Naga Durga Rao, V Roja, V Satyanarayana Rao and V Srinivasa Rao

Abstract: The present investigation was undertaken with 30 rice genotypes to study the variability, heritability and genetic advance as per cent of mean for yield and nutritional traits. Analysis of variance revealed presence of significant variability among the germplasm. High estimates of phenotypic coefficient of variation (PCV) and genotypic coefficient of variation (GCV) was recorded for number of productive tillers plant-1, yield plant-1, 100 grain weight, kernel length/breadth ratio, zinc content, iron content, amylose content, total antioxidant activity and total soluble phenol content indicating large amounts of variation among the set of germplasm. High heritability coupled with high genetic advance as percent of mean was observed for plant height, number of productive tillers plant-1, panicle length, yield plot-1, 100 grain weight, kernel length/breadth ratio, protein content, Zn content, Fe content, amylose content, total antioxidant activity, total soluble phenol content and phytate content revealing that these traits are mostly under the control of additive gene action and these characters may be improved by simple phenotypic selection. High heritability with moderate genetic advance was recorded for days to 50% flowering, spikelet fertility, total starch content and glycemic index appear to be under the control of non-additive gene action.

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