Chromosomal localization of QTLs controlling phenotypic stability in wheat-agropyron disomic addition lines using performance plots

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Research Paper 01/01/2014
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Chromosomal localization of QTLs controlling phenotypic stability in wheat-agropyron disomic addition lines using performance plots

Ezatollah Farshadfar, Azam Nazari, Meysam Ghasemi
J. Bio. Env. Sci.4( 1), 59-66, January 2014.
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In order to identify QTLs controlling genotype × environment interaction (GEI) in Agropyron performance plots were compared in disomic addition lines of Wheat-Agropyrum disomic addition lines. The experiment was conducted in six environments (A, B, C, D, E and F). The genotypes 7E, CHS and Sardary (SAR) were stable in static sense (static stability), as the profile of their mean yield in each environment was parallel to the profile of their environmental mean yield. The same conclusion was observed for genotypes SAR and 7E in dynamic sense (dynamic stability). SAR and 7E also exhibited wide adaptability (genotypes SAR and E7 yielded over the mean in each environment). CHS also revealed wide adaptability, which yielded over the mean in all environments, but it was not consistent in both dynamic and static stability. It was concluded that QTLs controlling stability and wide adaptability in Agropyrum elongatum are located on chromosome 7E and can be transfered into wheat genome for enhancement of adaptation. The regular performance plot (RPP) provided better information about environments and genotypic stability in static sense than the two other plots. The environment-centered performance plot (ECPP) better represented genotypic stability in dynamic sense, while the environment-standardized performance plot (ESPP) poorly represented stability in both senses (static and dynamic).


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