Genetic Diversity, Heritability and Correlation Studies for Yield and its Components in Bread Wheat under Heat Stress Conditions

Abstract

One hundred diverse bread wheat genotypes were studied for various morpho-physiological traits under timely sown and late sown conditions. The experiment were conducted during the cropping seasons 201213 and 2013-14 at research area of Wheat and Barley Section, Department of Genetics and Plant Breeding, CCSHAU, Hisar. Yield and yield contributing traits were found significant under both conditions. The estimates of GCV, PCV, heritability and genetic advance were high to moderate in timely sown and late sown conditions for the traits yield per plant, number of productive tillers, 1000 grain weight, spike length, number of spikelet per spike, flag leaf area, biological yield, cell membrane stability and grain filling rate. Correlation coefficients revealed that number of productive tillers, 1000 grain weight, number of grains per spike, biological yield, flag leaf area, cell membrane stability, grain filling duration and grain filling rate gave the positive associations with grain yield in both environments. Consequently, selection can be based on these traits in both environments for breeding of bread wheat under heat stress condition.