Multivariate analysis of morpho-physiological traits in bread wheat genotypes under terminal heat stress

Terminal heat stress has great impact on the quantity and quality of bread wheat that ultimately pose a serious concern about food security. The presence genetic variability suitable selection criteria is imperative for screening genotypes tolerance. Therefore, 60 advanced breeding lines four standard checks were evaluated morpho-physiological traits under late sown condition to understand importance principal component analysis in reduction large correlated data into few major components account maximum variability. Out twenty components, only three retained having 67.10% contribution towards total basis eigen values scree plot. Grain yield (0.995), days heading (0.912) plant height (0.752) positive loading first, second third respectively. holds promise crop improvement programme. Keywords: terminal stress, wheat, variability, plot