Genetic variability and correlation studies in red grain sorghum hybrids under rainfed condition

Abstract

The range of variation for 14 different characters indicated wide differences among the genotypes. The magnitudes of GCV were more or less equivalent to PCV for most of the characters studied indicating the least influence of the environment. High heritability coupled with high genetic advance as percent of mean and high GCV were recorded for grain yield, straw yield, ear head weight, number of secondary branches, number of primary branches and plant height indicating the presence of additive gene action for these traits. Number of primary and secondary branches, number of whorls, leaf width and length, number of leaves and plant height showed strong positive correlation with yield. Selection for number of whorls, primary and secondary branches, leaf length, number of leaves, plant height and ear head weight might be effective in achieving higher yield in red grain sorghum hybrids.