Correlation among fodder yield, quality and morpho-physiological traits under contrasting environments in sorghum
The present study was planned with the objective to find out the correlation of fodder yield, HCN content and quality traits with morpho-physiological traits under two different environments. The environments were created by applying normal five irrigations in one environment (Env-N) i.e. normal environment and by skipping the second and fourth irrigation in the other environment (Env-S) i.e. water stress environment. The positive and significant correlations were found between green fodder yield and early vigour, plant height, dry matter yield, leaf area index and proline content under both the environments. The negative and statistically significant correlations were found between green fodder yield and leaf stem ratio under both the environments and also with specific leaf weight under Env-N. Positive and significant phenotypic correlations were also found between proline content and early vigor, plant height, green fodder yield and dry matter yield under both the environments. None of the phenotypic correlations of HCN content with morpho-physiological traits under Env-N and Env-S were statistically significant. Among the quality traits studied Total Soluble Sugar (TSS)(%) content showed negative correlation with early vigour under both the environments. The results of correlation analysis revealed that under the situation of increasing water stress globally, selections for high green fodder yield can be carried out by selecting for early vigor and tall plants. The genotypes with high values for leaf area index, photosynthetic capacity and proline content would be more water use efficient and high yielding.
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