Phenotypic Adaptability of Characters Related to Productivity in Grain Sorghum, Sorghum Bicolor

Ninety eight genotypes of grain sorghum, including 2 high-protein high-lysine lines, 2 local varieties, and 6 restorers of promising hybrids (CSH 1, CSH 4, CSH 5, SPH 1, CSH 7R) and CSH 8R along with 8 females and their 80 hybrids, were evaluated with respect to yield and its components at four locations. Significant genotype-environment interactions were observed in the material under investigation, for grain yield, 250-grain weight, and all the developmental characters except days to flower and number of primaries, secondaries/panicle, and panicle weight. Both linear and nonlinear components of genotype-environment interaction were significant, and the prediction of performance across environments was difficult for these traits. Stability of yield has been incorporated through stability for yield components. The released hybrid CSH 5 is suitable for kharif as well as rabi seasons. Hybrids for different environments will have to be isolated to keep the total grain production stable.