Correlation coefficient analysis for grain yield and its contributing traits in bread wheat (Triticum aestivum L. em. Thell)

This research paper investigates the correlation coefficients between grain yield and its contributing traits in bread wheat (Triticum aestivum L. em. Thell), highlighting the significance of various morphological and physiological characteristics in enhancing wheat productivity. Wheat is a crucial global cereal crop, providing substantial nutritional benefits and serving as a primary food source for a significant portion of the world's population. The study analyzed 139 treatments comprising 19 diverse genotypes, including both parental lines and their derived F1 and F2 generations, evaluated under a Randomized Block Design across three replications during the Rabi season. Key traits assessed included biological yield, productive tillers per plant, harvest index, and thousand-grain weight, with data collected on thirteen quantitative characters. The findings revealed a strong positive genotypic correlation of grain yield per plant with biological yield (0.257), productive tillers (0.427), harvest index (0.464), and number of grains per ear (0.371) in the F1 generation. Similarly, in the F2 generation, significant positive correlations were observed with biological yield (0.302), productive tillers (0.276), and harvest index (0.436). While phenotypic correlations were generally lower than genotypic ones, they reinforced the importance of these traits in yield improvement. The results suggest that breeding programs focusing on these key traits can effectively enhance wheat yield potential, emphasizing the critical role of genetic selection in improving agronomic outcomes. Overall, the study provides valuable insights for wheat breeders aiming to develop high-yielding, resilient wheat varieties through strategic selection and hybridization.