Assessment of genetic variability, heritability and genetic advance for yield and physiological traits under late sown condition in bread wheat (Triticum aestivum L. em. Thell.)

Abstract

The present investigation was carried out with 32 diverse genotypes of bread wheat in completely randomized block design with 3 replications at GBPUAT, Pantnagar under late sown condition. The observations were recorded on 15 agronomic traits and 3 physiological traits. The statistical analysis for genetic variability was done using ANOVA, h2, GCV, PCV and GA. The analysis of variance revealed significant difference among the genotypes. The results of the present study indicated that high heritability values were observed in most of the yield contributing and physiological traits except grain filling duration and number of tillers per plant. High GCV and PCV were observed for the characters plot yield, canopy temperature depression-I, -II, -III, and biological yield etc. Moderate GCV and PCV were found for the characters relative water content, plant height, harvest index and 1000 grain weight etc. whereas low GCV and PCV were observed for the characters days to 75% heading, days to 75% anthesis, days to 75% maturity and SPAD. The genetic advance was observed high for the character such as plant height and relative water content while moderate for number of grains per spike and low for days to 75% heading, days to 75% anthesis, days to 75% maturity and SPAD.