Association of important morpho-physiological and biochemical traits associated with grain yield for moisture stress tolerance in rabi sorghum under late sown condition

Abstract

Ten different genotypes and three checks of rabi sorghum (Sorghum bicolor var. Moench) were evaluated for their morpho-physiological, growth, biochemical parameters with yield parameters under moisture stress late sown condition at research farm of sorghum research, Akola. The experiment was laid out in a Randomized Block Design, replicated thrice. The morpho-physiological and phenological parameters viz., plant height, leaf area plant-1, total dry matter plant-1, relative leaf water content, chlorophyll content index, adaxial stomatal frequency and abaxial stomatal frequency showed positive and significant correlation with grain yield. The correlation between growth and biochemical parameters indicated that the growth parameters viz., relative growth rate, crop growth rate, absolute growth rate, leaf area index, specific leaf weight and number of green leaves plant-1, biochemical parameters viz., leaf proline content, chlorophyll stability index, nitrogen content in leaves, nitrogen content in seed and protein content in seed showed positive and significant correlation with grain yield. While, the phenological parameters viz., Days to 50 percent flowering, days to physiological maturity showed negative and significant correlation with grain yield. Therefore, these all parameters should be considered for the developing genotypes for stress tolerance under late sown rainfed condition.