Correlation and Regression Analysis for Yield and its Associated Traits in Hexaploid Wheat (<i>Triticum aestivum </i>L.)

An experiment was conducted in 2023–2024 at the Wheat and Barley Research Institute, Tandojam, to analyze correlation and regression in eight hexaploid wheat cultivars (TD-1, Kiran-95, Khirman, Marvi-2000, Bakhar-2002, Benazir, TJ-83, Moomal) for nine yield-related traits using a randomized complete block design with three replications. Traits recorded included plant height, tillers per plant, spike length, spikelets per spike, grains per spike, grain yield per plant, 1000-grain weight, biological yield, and harvest index. All genotypes showed significant differences (P < 0.01 and P < 0.05). Mean performance revealed TD-1 had the shortest plants (80 cm), most tillers (7.39), and highest grains per spike (57.38); Kiran-95 had the longest spikes (12.40 cm); Benazir the most spikelets per spike (18.33); TJ-83 the highest grain yield (11.43 g) and harvest index (47.86%); Khirman the highest 1000-grain weight (46.73 g); and Bakhar-2002 the maximum biological yield (24.76 g). Grain yield per plant showed strong positive correlations with all traits (r = 0.5285**–0.9425**), with the greatest variation and contribution from tillers per plant (88.83%, 0.8773 g). These genotypes are promising for selection in future breeding programs.