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:: Volume 7, Issue 1 (2020) ::
pgr 2020, 7(1): 1-18 Back to browse issues page
Graphical Analysis of Reaction of Bread Wheat Genotypes to Water Stress in Lorestan Province
Fatemeh Darvishnia , MohammadHadi Pahlevani * , Khalil Zaynali Nezhad , Khosro Azizi , Saied Bagherikia
Department of Plant Breeding and Biotechnology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran , hpahlevani@gau.ac.ir
Abstract:   (6774 Views)
In order to determine the most effective indices for quantifying drought tolerance and identify genotypes that are tolerant to water stress in bread wheat, 50 bread wheat genotypes were compared in a randomized complete block design with three replications under both the non-stress dry farming with two complementary irrigation and the water stress dry farming conditions in Khorramabad, Iran. Analysis of variance showed that there was a significant difference among the genotypes in terms of all of the traits except the number of spike per area. In this study, eight indices including: Stress Tolerance Index (STI), Geometric Mean Productivity (GMP), Mean Productivity (MP), Yield Index (YI), Harmonic Mean (HM), Yield Stability Index (YSI), Stress Susceptibility Index (SSI), and Tolerance index (TOL) were calculated by using of seed yield of the genotypes under both conditions. Indices that selection based on them will improve the yield in both conditions, are considered as suitable index. STI, GMP, MP and HM were introduced as suitable index for drought resistance selection. Genotypes Shiroodi and S-90-5 were determined as the most appropriate based on 3D plot. Based on positive correlation between water stress resistance indices and yield under stress and non-stress environments, STI and GMP were the best indices. By using the Biplot method, Shiroodi, S-90-5 and Oroum genotypes were considered as high yielding potential genotypes under the both conditions. According to the results of cluster analysis, genotypes were classified into three groups based on drought tolerance indices. Graphical analysis of genotypes also showed that genotypes Shiroodi and S-90-5 were more profitable than others under both drought stress and non-drought stress conditions. These genotypes could also be used as parents caring desirable genes in the crossing programs and selection of tolerate genotypes.
Keywords: Tolerance, Stress, Index, Drought, Wheat
Full-Text [PDF 883 kb]   (1005 Downloads)    
Type of Study: Research | Subject: Plant improvement
Accepted: 2020/05/5
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Darvishnia F, Pahlevani M, Zaynali Nezhad K, Azizi K, Bagherikia S. Graphical Analysis of Reaction of Bread Wheat Genotypes to Water Stress in Lorestan Province. pgr 2020; 7 (1) :1-18
URL: http://pgr.lu.ac.ir/article-1-172-en.html


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Volume 7, Issue 1 (2020) Back to browse issues page
پژوهش های ژنتیک گیاهی Plant Genetic Researches
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