Estimating parameters of variability, adaptive value and selection coefficient in bread wheat (Triticum aestivum L.) under salinity and drought stress conditions
Abstract
Genetic variability, heritability and genetic advance were computed among 14 strains of wheat under drought stress conditions during rabi 2000–01. A similar set of strains was used to compute the viability, adaptive value and selection coefficient under drought and salinity stress conditions during rabi 2001–02. Heritability estimates were low to moderate except for grain yield/plant. For grain yield/plant high heritability estimate (75.85%) was associated with higher genetic advance (20.30%). In case of present population, selection based on grain yield/plant were more fruitful. The days to 75% flowering of a strain was not always correlated with its viability. The adaptive value of a strain was the function of a genotype and the environment in which it was grown.
