Determination of Adaptability of Advanced Bread Wheat (Triticum aestivum L.) Lines under Rainfed Conditions

Background: This study was conducted during the 2021/2022 and 2022/2023 wheat growing seasons in Ordu province to determine the adaptability of 99 bread wheat (Triticum aestivum L.) genotypes obtained from theinternational winter wheat improvement program (IWWIP) and the international maize and wheat improvement center under rainfed conditions. Methods: In the first year, the experiment was conducted using the augmented experimental design, while in the second year, it was conducted using the randomized complete block design with three replications. The study examined various phenological, morphological, agronomic, quality and some biochemical grain content parameters in wheat genotypes. Result: According to the biplot analysis, significant variations were determined among the genotypes in terms of different traits. Regarding morphological and agronomic characteristics, genotypes 5, 67, 33 and 36 stood out with superior performance in traits such as plant height (10.94-66.51 cm), flag leaf length (10.74-24.04 cm), flag leaf width (0.87-2.3 cm), flag leaf area (9.53-33.6 cm²), spike weight (0.82-2.54 g), spike length (4.79-9.66 cm), number of spikes per square meter (144.58-565.83 spikes/m²), grain yield per spike (0.67-1.63 g), number of grains per spike (14.69-40.45), thousand kernel weight (23.01-45.84 g), grain yield per decare (186.13-348.13 kg/da) and harvest index (24.13-60.38%). In terms of quality traits, genotypes 42, 14, 11, 5, 27, 65, 73 and 36 were found to be superior for Zeleny sedimentation value (24.07-62.07 ml), delayed sedimentation value (10-72.07 ml), grain protein content (10.01-16.71%), grain moisture content (11.73-14.63%), wet gluten content (17.67-40.07%) and gluten index (24.07-98.07%). Additionally, in terms of biochemical content, genotypes 33, 65, 93, 24 and 42 were notable.