Characterization of lines for morpho-physiological, yield and yield-related traits under heat stress
Author(s): Tushadri Singh, JP Jaiswal and Prabhdeep Singh
Abstract: The Present investigation entitled was undertaken during Rabi season 2021-22 at Crop Research Center, GBPUAT, Pantnagar, Uttarakhand. The experiment was carried out to derive Analysis of Variance, general mean, GCV, PCV, Genetic advance as a percent of mean, broad sense heritability, correlation coefficient upon analyzing different lines for various traits in wheat relating to heat stress. The experiment was carried out with 14 different varities/genotypes for yield and yield contributing characters under terminal heat stress. The trial consisted of three replications of each genotype in RBD design. High genetic advance was seen for characters-chlorophyll content, grain yield per plant and 1000 grain weight.The correlation coefficients showed positive and significant correlation between grain yield per plant with plant height, number of tillers per plant, days to 50% flowering, number of grains per spike, spikelets per spike, relative water content and chlorophyll content. The high magnitude of direct effect of number of grains per spike, number of spikelets per spike, 1000 grain weight along with highly significant correlation in the desirable direction towards grain yield per plant indicated the true and strong relationship between grain yield and these characters suggesting direct selection based on these character would help in selecting the high yielding genotypes in wheat under heat stress conditions.
