GENOTYPE X ENVIRONMENT INTERACTION AND STABILITY FOR GRAIN YIELD AND ITS ATTRIBUTES IN PEARLMILLET
ABHAY BIKASH, I. S. YADAV, R. K. ARYA AND R.A.S. LAMBA1
Department of Genetics and Plant Breeding, CCSHAU, Hisar-125004
1Regional Research Station, Bawal (Rewari)
(Received: 13 December 2013; Accepted: 27 December 2013)
An experiment was conducted to study the stability of thirty hybrids of prearlmillet during kharif season at four locations. Analysis of variance for stability revealed that mean squares due to genotypes and environments + G x E interaction were highly significant, indicating thereby existed significant differences among genotypes and also the environments were different from each other and genotypes reacted differently in different environments. For quantitative traits such as yield, the relative performance of different genotypes often varies from one environment to another i.e. G x E interaction plays an important role. Progress of selection is also reduced due to effect of a large G x E interaction. The hybrids studied in the present investigation, in general, did not exhibit uniform pattern of environmental response (linear). This attribute appears to be specific for individuals. It can, therefore, be suggested that while making selection, attention should be paid to the phenotypic stability of the characters and genotypes having average response for different characters could be used in identifying stable hybrids. The results also revealed that the hybrid 97111A x CSSC46-2 was the most ideal. Beside high grain yield, it exhibited stable performance across the environments for harvest index, plant height and ear length. This indicated that the stability of various component characters might be responsible for observed stability of genotype for grain yield.
Key words: Hybrids, genotype x environment interaction, stability, grain yield and pearlmillet