Division of Genetics, Indian Agricultural Research Institute, New Delhi-12
Forty six populations of gram comprising 41 F3 populations and 5 standard checks were grown in nine environments at three locations. Data on yield and its components was analysed for genotype × environment interaction. Individual regression analysis of the 46 populations revealed that major portion of genotype × environment interaction was linear and thus predictable; however, nonlinear interaction was also considerable. Grouping of populations on the basis of residual deviations using model of Perkins and Jinks (1968b) suggested that non-linear interaction may also be genetically controlled to a great extent.
The correlation between various adaptability parameters show that the mean and response were positively associated for yield. The association between adaptability parameters of yield and its component brought out the fact that main component of yield stability was stability of pod number per plant.
Two populations from crosses NP 58 × 1707 and 1102 × 1713 respectively were found to possess specific adaptability for good environments.
