Assessment of morpho-physiological characteristics in common and wild barley cultivars under dehydration condition

In order to study the reaction of barley genotypes to drought، an experiment was conducted in a factorial design based on CRD for two wild ecotypes and four crop genotypes of barley in greenhouse. In this study، the barley genotypes and wild ecotypes as the first factor and irrigation treatment with three levels include 70 percent of water holding capacity of soil، 30 and 10 percent as the second factor were considered as treatments. Analysis of growth and other morphological characteristics such as tillers، plant height and leaf number and leaf area per plant and some physiological characteristics including the relative water content، leaf chlorophyll content، osmotic potential، osmotic adjustment، stomatal conductance، canopy temperature in each three treatments were measured. Analysis of variance showed that the effect of drought on all traits and differences between genotypes were significant. Results of correlation revealed that there is a significant and direct relationship between relative water content with osmotic potential and percentage of dried material. Path analysis identified that osmotic potential had the most direct effect on died material. The 41-1 and Morocco genotypes showed greater sensitivity than other genotypes to the applied stress.