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      • Open Access Article

        1 - Evaluation of the Effects of Some Mrphophysiolocal Traits on Seed Yield of Winter Wheat Genotypes
        Babak Hooshmandi Vrahram Rashidi
        To evaluate the effects of some morphologic and physiologic traits on seed yield of 15 winter wheat genotypes and landraces an experiment on the basis of randomized complete block design with four replications was conducted at the Agricultural Research Field of Islamic More
        To evaluate the effects of some morphologic and physiologic traits on seed yield of 15 winter wheat genotypes and landraces an experiment on the basis of randomized complete block design with four replications was conducted at the Agricultural Research Field of Islamic Azad University of Tabriz branch in 2012-2013. Analysis of variance showed that traits like plant height, peduncle length, spike length, number of kernel spike, spike density, number of unfertile tiller, 1000 kernel weight, seed yield, harvest index, biological yield and relative water content of flag leaf were significant It was also indicated that kernel no. per spike, spike density, fertile tiller no., 1000 kernel weight, harvest index and biological yield were positively correlated with seed yields. Results of path analysis also showed that the direct effect of harvest index and relative water content of flag leaf on grain yield were positive but the direct effect of spike length on grain yield was negative. Cluster analysis of WARD method, divided genotypes into two groups. The results also specified that genotypes 7, 4 and 13 were higher seed yielder than other genotypes.  Manuscript profile
      • Open Access Article

        2 - Determining the effective traits on bread wheat genotypes grain yield under drought stress and non-stress conditions
        Babak Hooshmandi
        To determine effective factors on grain yield under drought stress and non stress conditions at the end of the season, 15 bread wheat genotypes were examined as two separated experiments in Research Center of Faculty of Agriculture in Islamic Azad University, Tabriz Bra More
        To determine effective factors on grain yield under drought stress and non stress conditions at the end of the season, 15 bread wheat genotypes were examined as two separated experiments in Research Center of Faculty of Agriculture in Islamic Azad University, Tabriz Branch during 2012-2013. The cultivars were compared based on completely random block design with three replications. All studied traits were significant and there was frequent diversity among studied genotypes in the studied traits in both experimental conditions. The grain yield under non stress and stress conditions were 2.8 and 2.23 ha, respectively and drought stress had the most effect. The correlation coefficients among grain yield, biologic yield and harvest index were positive and significant in both experimental conditions and also grain yield under without stress showed a positive and significant correlation with number of spikelets per spike under stress conditions with spike length. According to stepwise regression under without stress conditions, number of spikelets per spike determined 40% of the grain yield changes. Also, in non stress conditions number of spikelets per spike and in stress condition spike length, plant height and pollination were most effective on grain yield and justified variation in grain yield and also genotype 14 showed higher yield relative to other genotypes in both experimental conditions. Manuscript profile