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Department of Agriculture Science and Research Branch, Islamic Azad University, Tehran, Iran
Abstract:   (56 Views)
In order to study of drought stress on soybean (Glycin max L.), experimental with two stages and 25 soybean genotypes based on Simple Lattice Design 5×5 with two replications in two locations (normal and drought condition) carried out in Bojnourd. Also evaluation of germination traits with three replications based on Completely Randomized Design has done in lab. Imposing drought stress was started in farm condition after plant establishment at second trifoliate (V2) by irrigation period and in germination experiment, drought stress, has been imposed in two levels (normal and -9 bar). Result revealed that among 20 measured traits in field condition, the most reduction in yield components were related to biomass with 32.6% and number of seed per plant with 26.6% respectively. Also drought stress caused to reduction of yield in hectare by 46.7% and single plant yield by 35.2%. Korona genotype with 69.9% had the highest reduction and Capital genotype with 10.7% had the lowest reduction regarding final yield. Lab outcomes showed that plumule with 83.3% and seed length index with 80.44% had the most significant reduction. With considering to Total Ranking Index (TRI), Capital, Chaleston and Jame×Williams genotype were more resistant to drought stress and Korona and Amuroska were more sensitive to drought stress. Ranking was done by two methods: SDI, TRI. Mann Whitney nonparametric test did not show significant difference among genotype ranking in these two method.
     
Type of Study: Research | Subject: Special

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