Locating QTLs controlling genotypic stability in Rye using AMMI model and AMMI based stability statistics
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2014, Vol 4, Issue 5
Abstract
To locate QTLs controlling yield and yield stability in Rye, 7 disomic addition lines of Secale cereale into the genetic background of Chinese Spring (CS= recipient) were used in a completely randomized block design with three replications for 3 rainfed and irrigated conditions. The results of combined analysis of variance showed highly significant differences for environments, genotypes and genotype × environment interaction. The first multiplicative axis term explained 94.30% of GEI sum of squares. The average grain yield of the genotypes ranged from 0.72g for addition line 6 to 6.54g in addition line 2 indicating that QTLs controlling grain yield in Rye are located on chromosome 2R. Biplot analysis revealed that QTLs monitoring simultaneously yield and yield stability in Rye are distributed on chromosomes 2R, 5R and 7R. According to the all AMMI based stability measures and mean grain yield genotype 2R was identified with high grain yield with stability followed by 5R, therefore most of the QTLs controlling yield and yield stability are located on chromosome 2R of Rye. AMMI based stability statistics were positively correlated, therefore all of the AMMI based measures discriminate stable entries at the same manner.
Authors and Affiliations
Fartemah Rozgard, Ezatollah Farshadfar
Keywords
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