Genetic analysis of wheat (Triticum aestivum L.) Genotypes for physiological traits under different moisture regimes

A study was conducted to work out the phenotypic and genotypic variance, heritability, genetic advance, correlation coefficients and path analysis for yield and physiological traits under three sowing conditions viz., timely sown irrigated, timely sown restricted irrigated and rainfed conditions. All the characters studied showed significant variation in respect of the genotypes under the present investigation. High heritability estimates were found for characters such as canopy temperature depression, grain per spike, membrane injury and relative water content under all the sowing conditions. Positive and significant correlation was observed for canopy temperature depression at anthesis (0.500), and relative water content (0.502). The path coefficients were studied for all the traits under three environments viz., timely sown irrigated, restricted irrigation and rainfed conditions. Canopy temperature depression and membrane injury percent had direct positive effect on yield both at genotypic and phenotypic levels across the three environments.