Investigation of drought stress tolerance in barley varieties using drought tolerance indices

In order to investigation of drought stress effect and selection of drought tolerant barley varieties, ten cultivars studied in normal and drought stress condition in Karaj. These varieties studied in two separate experiment in normal and stress condition base Randomized Complete Block design with three replications. Combine Analysis of variance showed that the test environments for grain yield, plant height, spike weight, grain weight, seed length, seed diameter and peduncle length were significant. In this analysis, between cultivars for grain yield, plant height, spike length, awn length, seed length and peduncle length was statistically significant. Interaction of genotype and environment for grain yield, plant height, spike, spike, awn length, kernel diameter and peduncle length were significant. Under normal conditions the maximum yield obtained for Valfajr and Strain as 3199 and 2975.7 kg per hectare respectively. The highest grain yield under drought stress obtained for Strain, Gorgan and Kavir varieties as 3179.3, 2554.2 and 2554.2 kg per hectare respectively. Base TOL and SSI indices, Reyhan, Kavir and Gorgan cultivars were the tolerant and Gorgan 4, Valfajr, Makuei and Zarjou varieties were the most sensitive cultivars. Base MP, GMP and HARM, the Nimrooz, Gorgan and Strain were detected as tolerant cultivars. Gorgan 4, Reyhan, Valfajr and Zarjou based on these indices were susceptible to drought stress. Base STI index, Nimrooz, Gorgan and Strain varieties were tolerant to drought.