The identification of stable and high-yielding wheat genotypes under variable environmental conditions is essential for sustainable grain production. In this study, evaluating 201 bread wheat (Triticum aestivum L.) cultivars succeeded during 2021–2023 under contrasting environmental conditions in the Tashkent and Khorezm regions of Uzbekistan. Based on morphophysiological characteristics, yield components, and stress tolerance indices, 20 promising genotypes attained selection for detailed evaluation. Several productivity and stability indices used included the stress tolerance index (STI), mean productivity (MP), geometric mean productivity (GMP), plant productivity index (PPI), and Mexican index (Mx), assessing the adaptability and yield performance of studied genotypes. The results revealed considerable variability among wheat genotypes in yield components and productivity indices across environments. The highest recorded 1000-kernel weight resulted in the cultivar Krasnovodopadskaya 210 under Tashkent conditions, whereas in the Khorezm Region, high values were evident in cultivars Krasnovodopadskaya 210, Ramin, and Frunzenskaya 60. Combined analysis of yield performance and stress tolerance indices identified cultivars Asr, Alex, and Genotype-2 as the most stable and high-yielding genotypes across contrasting environments. The identified promising genotypes represent valuable genetic resources aimed at improving yield stability and stress tolerance under diverse agroecological conditions in Uzbekistan.

Keywords: Bread wheat (T. aestivum L.), stress tolerance index, yield indicators, different conditions

Key findings: Promising bread wheat (T. aestivum L.) genotypes, Asr, Alex, Genotype 2, Karavan, and Krasnovodopadskaya 210, emerged with higher yield potential and stability through multi-environment evaluation across the contrasting environments of Uzbekistan.