Genotype X Environment Interaction Studies in Single Cross Maize Hybrids for Quality Traits under Different Environments
Khushbu Chittora *
Department of Agriculture, Rajasthan Government, Rajasthan, India.
R. B. Dubey
Department of Genetics and Plant Breeding, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur, Rajasthan 313001, India.
Narayan Ram Gurjar
Agriculture University, Jodhpur, India.
*Author to whom correspondence should be addressed.
Abstract
Sixty eight genotypes of maize (48 hybrids, 16 parents and 4 checks were evaluated under three different environments to test their stability. Variance due to genotypes, environments and genotype x environment interactions were found significant for oil content, starch content and protein content. Regression approach by Eberhart and Russel 1966 used to investigate the nature of G x E interaction and for identifying genotypes possessing general and specific adaption. None of the hybrids had stability for all quality traits. For Grain Starch content hybrid EI-1155-1 x EI-2416, for oil content hybrid EI-670-2 x EI-2403 and for Protein content hybrids EI-2187 x EI-2403, EI-536-3 x EI-2403, EI-2176 x EI-561-2,EI-2173 x EI561-7 had higher mean values, non significant deviation from regression and regression coefficient around unity (bi=1) indicating the stable performance in different environment and wider adaptability.
Keywords: Grain quality, protein, oil, starch content, stress, linear regression, regression coefficient