Analysis of Correlation and Path Coefficient in F1 and F2 Generations of Bread Wheat (Triticum aestivum L.) under Normal and Heat Stress Condition

Abstract

The significant positive correlation of phenotypic and genotypic performance as well as path correlation of crops helps in selection of the superior cultivars. Based upon important significance of these estimates, it was applied in our research. For this an experiment comprised of 16 parental lines and five testers following line x tester mating design. During Rabi season 2024-25, Twenty-one parents, 80 F1s and 80 F2s were sown (25 November) in Normal and Late (25 December) condition, in Randomized Block Design (RBD) with three replications at Nawabganj Farm, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, (U.P.). A study on Twenty-three characters revealed that there was a highly significant and positive association of grain yield per plant exhibited highly significant and positive correlation with biological yield per plant and productive tillers per plant, Also, the grain yield per plant exhibited non-significant and negative correlation with number of leaf rolling and days to 50% heading. The highest positive direct and indirect effect on grain yield per plant was exerted by biological yield per plant followed by harvest-index. The characters contributed negative direct effect on grain yield per plant were number of spikelets per spike and days to anthesis. on the other hand, productive tillers per plant via biological yield showed positive indirect effect and days to 50% heading via biological yield showed negative indirect effect on grain yield per plant. As a result, these characters should be given weightiness for the future wheat improvement.