تاﺛﻴﺮ ﺑﺮﺧﻲ ﺻﻔﺎت ﻣﻮرﻓﻮﻓﻴﺰﻳﻮﻟﻮژﻳﻚ ﺑﺮ ﻧﻤﺮه ی ﺗﺤﻤﻞ ﺑﻪ ﺗﻨﺶ(STS) در 100ژﻧﻮﺗﻴﭗ ﮔﻨﺪم ﻧﺎن(Triticum Aestivum)

Grain yield is the easiest criterion for selection of drought tolerance varieties in stress condition. However, stress tolerance score is better index for screening drought tolerance genotyspe. In order to evaluate the effect of some important physiologic and morphologic trait on stress tolerance score of 100 breed wheat genotypes an experiment was carried out during the 2012 in research field of Shahid Bahonar university of Kerman based on a completely randomized block design with four replications. Result showed significant diversity for the most traits. Stress tolerance score had positive and significant correlation with yield in drought stress condition, potential yield, spike length, fertile tiller number, flag leaf width (r=0.83** , r=0.78**, r=0.45** , r=0.38**, r=0.26** , respectively). Plant height had positive and significant correlation with grain yield in drought stress condition (r=0.22*) while, plant height had not significant correlation with yield in well watered condition (r= - 0.1ns). Selection based on traits that have significant correlation with stress tolerance score could improve the grain yield in drought prone environments.
Key word: Breed wheat, Grain yield, Stress tolerance score