The determination of genotypes tolerant to drought stress is of major importance in wheat breeding. A two-year split plot field experiment was conducted to determine the traits affecting wheat grain yield and identify the most tolerant genotypes using drought-tolerant indices. Drought stress was applied to 28 genotypes by stoppage of irrigation at the growth stage of 50% inflorescence emergence. Crop yield and growth components were determined. Drought tolerance indices, correlation coefficients, multiple regression as well as path and cluster analyses were applied to determine the most tolerant genotypes. Analysis of variance indicated significant differences among genotypes in terms of growth and yield. The genotype by treatment interaction was also significant. Drought tolerance indices indicated that Darya, Aftab, URBWYT-94-2 and URBWYT-94-4 were the most tolerant genotypes. URBWYT-94-2 had the highest average grain yield under drought stress. Correlation coefficients indicated a significant and positive correlation between geometric mean productivity (GMP) and mean productivity (MP) indices as well as between stress susceptibility (SSI) and drought tolerance (TOL) indices (p ≤ 0.01). Stress tolerance index (STI) was significantly correlated with MP and GMP. A significant correlation was found between harmonic (HARM), STI, GMP and MP indices (p ≤ 0.01). STI and GMP were the most suitable indices to identify drought-tolerant wheat. According to path analyses, the correlations among wheat yield components were positive and significant.

确定耐旱胁迫的基因型在小麦育种中具有重要意义。进行了为期两年的裂区田间试验，以确定影响小麦籽粒产量的性状，并使用耐旱指数确定最耐受的基因型。通过在 50% 花序出现的生长阶段停止灌溉对 28 个基因型施加干旱胁迫。确定了作物产量和生长成分。应用耐旱指数、相关系数、多元回归以及路径和聚类分析来确定最耐受的基因型。方差分析表明基因型在生长和产量方面存在显着差异。处理相互作用的基因型也很重要。耐旱指数表明 Darya、Aftab、URBWYT-94-2 和 URBWYT-94-4 是最耐受的基因型。URBWYT-94-2在干旱胁迫下平均粮食产量最高。相关系数表明几何平均生产力 (GMP) 和平均生产力 (MP) 指数之间以及胁迫敏感性 (SSI) 和耐旱性 (TOL) 指数之间存在显着的正相关关系。p  ≤0.01）。胁迫耐受指数（STI）与 MP 和 GMP 显着相关。谐波 (HARM)、STI、GMP 和 MP 指数之间存在显着相关性 ( p  ≤ 0.01)。STI和GMP是最适合鉴定耐旱小麦的指标。通径分析表明，小麦产量构成要素之间呈显着正相关。