ناصر صباغ نیا

This study was performed to evaluate the ability of several selection indices to identify tolerant genotypes under a drought stress conditions. Fourteen durum wheat genotypes were evaluated under both drought stress and non-stress environments using twelve drought tolerance indices. Results showed that genotypes G3 and G4 were the highest yield non-stress condition, while genotype G8 displayed the highest performance under stress condition. The significant and positive correlation of YP with GMP, MP, STI, K1STI, YP and HM indices indicated that these indices were more effective in identifying high yielding genotypes under non-stress condition while the positive association of YS with K2STI indicated that this index was more effective in identifying high yielding genotypes under stress condition. Genotypes performed differently to drought stress, which justifies screening durum wheat for both yield and drought tolerance. Therefore, STI-based indices (STI, K1STI and K2STI) can discriminate drought tolerant genotypes with high grain yield under both non-stress and stress conditions. Finally, the genotype G3 besides genotype G8 were identified to be the most favorable genotypes and recommended for cultivation.