Evaluation of Wheat Genotypes for Heat Stress under Late Sown Conditions of Allahabad Region

Phenotypic and genotypic coefficient of variation (PCV and GCV), heritability (h²) and genetic advance (GA) for 17 characters were estimated in 19 genotypes of bread wheat (Triticum aestivum L.) under late sown conditions of Allahabad. The significant mean sum of squares for most of the characters indicated the presence of substantial amount of variability. On the basis of mean performance highest grain yield/plant was exhibited by genotype AAIW12 followed by K 910-30 and NW 5013. Highest chlorophyll content was depicted by genotype K 9423 and highest relative injury was observed in genotype K-910-30. High estimates of GCV, PCV, heritability and genetic advance were observed for relative injury, chlorophyll content, grains/spike, tillers/plants, plant height and spike length indicated scope for improvement through simple selection for these characters. However, there was little variability and scope for selection in the materials for days to maturity, days to 50% flowering and days to heading.