Genotype × environment interaction and yield stability analysis in multienvironment

Abstract

The present study was carried out in 8 genotypes with their 56 F1s hybrids over three locations to study stability in the performance of different environmental conditions for various economic traits. The mean squares due to genotype were significant for oil content, seed cotton yield, micronaire and fiber strength. The genotype × environment mean square was significant for seed cotton yield and fiber strength indicating different response of the genotypes in different environments. Three crosses, namely 23 ES × B 58-1290, B 58-1290 × 23ES and B 58-1290 × 23 K were found more stable for oil content (%) over the years as indicated by their nonsignificant deviation from regression. For boll weight and seed cotton yield, among the crosses VCH (F) × RS 810 and RS 810 × 23 ES had high mean and was stable and responsive to favorable environments as indicated by the regression coefficient more than unity.