Application of multi-variate methods in determining grain yield stability of durum wheat genotypes in semi-warm dryland areas of iran

Different methods for determining the effect of genotype × environment interaction, there are parametric, nonparametric and multivariate methods. Nineteen selective advanced genotypes of durum wheat from 2004-2005 advanced yield trial by cv. Saimareh with the control variety for three agronomic years (2005-2008) in five locations (i.e: Gachsaran, Gonbad, Koohdasht, Moghan and Ilam) planted by using randomized complete block design with 4 replicates. In this study, four multivariate cluster analysis methods of Lin and Butler and AMMI method for analyzing of Genotype × environment interactions were used. In methods one and three of cluster analysis genotype 14, in methods two and four of cluster analysis genotype 12 were placed in individual group and these genotypes were selected as most stable genotypes with higher yield than total mean yield. The genotypes of 2, 4 and 14 have lowest SIPC1 in AMMI method and higher average grain yield than total mean yield determined for most stable genotypes. By attention to the result, genotypes 12 and 14 with average yield of 3218 and 2970 kg/ha respectively selected as promising genotypes for introduce cultivar. Also genotypes 2, 9 and 13 can use for excel and adaptable parents in crossing block projects.