Assessment of genetic variability, heritability and genetic advance for yield and physiological traits under normal 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 normal 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 all the characters studied except grain filling duration. High GCV and PCV were observed for the characters plot yield, canopy temperature depression-I, -II, -III and SPAD value. Moderate GCV and PCV were found for the characters 1000 grain weight, harvest index, relative water content, grain weight per spike and biological yield per plant whereas low GCV and PCV were observed for the characters days to 75% heading, days to 75% anthesis, days to 75% maturity and grain filling duration. The genetic advance was observed moderate for the character like SPAD, harvest index and days to 75% heading while low genetic advance was estimated for the rest of the characters. High genetic advance was observed for none.