Evaluation of grain yield of wheat genotypes using stress tolerance indices

Drought hasunfavorable impacts on the success of agriculture in many parts world.Providing future populations with enough food would obviously require evaluation crop yield, higher potentials, and provision yield stability drought-affected regions. In this research, drought-tolerance wheat genotypes was studied a randomized complete block design three-replication experiment under normal drought stress conditions. two consecutive growing seasons, measurements wereaimed at evaluating susceptibility index (SSI), tolerance (TOL), mean productivity (MP, (STI, harmonic (HARM), (YI, genomic (GMP). These parameters described yieldsof different for years both The combined analysis variance showed that environment significantly affected grain yield. values by condition were less than those non-stress condition.Stress intensity (SI) 46% 43% first second year, respectively.In years, MP, GMP, STI HARM indices correlated Based three-dimensional diagram these indices, pishgam ws-82-9 considered as most superior year (both conditions).. Furthermore, pishgam, alvand, ohadi year. According to bi-plot based major components, more tolerant stress. general, it is suggested shows level sustainability. It found be genotype highest Its resistance have increased during 80 breeding selection.