Vol. 11, Issue 8 (2022)

Author(s):
Koppeti Vinodhini, T Kalaimagal, D Kavithamani and A Senthil

Abstract:
The present study was conducted with 68 red sorghum genotypes and four checks viz., CO 4, Paiyur 2, Usilampatti local and AURS 013 during Rabi, 2021 to assess the variability and character association among grain yield and yield component traits. This study clearly indicated the presence of a considerable level of variation among the genotypes. The data was observed for thirteen quantitative traits viz., days to 50% flowering, plant height, stem diameter, number of leaves, flag leaf length, flag leaf width, panicle length, panicle width, panicle weight, days to maturity, hundred seed weight, dry fodder yield per plant and grain yield per plant. High PCV and GCV were observed for panicle length, panicle width, panicle weight, hundred seed weight, dry fodder yield and grain yield per plant, which suggested the greater scope for selection of superior genotypes for these traits. Similarly, high heritability coupled with high genetic advance as per cent of mean was observed for days to 50% flowering, stem diameter, panicle width, panicle weight, hundred seed weight and dry fodder yield, which indicated that due to additive gene action, the selection may be effective. The traits viz., plant height, panicle width, panicle weight, hundred seed weight and dry fodder yield recorded significant and positive correlation with grain yield per plant. Path analysis study revealed that panicle weight had a high direct positive effect on grain yield per plant; days to 50% flowering and panicle width showed moderate positive whereas days to maturity showed moderate negative direct effect on grain yield per plant. As a result of this research, it is observed that the traits viz., panicle width, panicle weight, hundred seed weight and dry fodder yield exhibited a positive correlation and direct positive impact on grain yield per plant, which can be used for selection for increasing grain yield.