Evaluation of Genotype × Environment Interaction of Grapevine Genotypes ( Vitis vinifera L.) By Non Parametric Method

Abstract

To evaluate genotype × environment interaction (GEI ) of grapevine, 20 genotypes of grapevines with Russian origin were evaluated at on e location in Urmia and four locations in Takestan (two locations under full irrigation an d two locations under drought stress). This research was performed in a randomized complet e block design with three replications and three vines in each plot, in 2012- 2013 season. Data on fruit yield (kg/vine) of the grapevine genotypes grown at different test locations were recorded and subjected to stability analysis by nonparametric methods. Res ult of the combined ANOVA revealed that variances due to genotypes, environments, and genotype-environment interactions were highly significant. Significant genotypic vari ance indicated genetic diversity among genotypes yield. The highest S i (1) and S i (2) mean absolute rank was observed for genotypes Ramfi TCXA, Apozoski Ramfi, X45 and Anapiski Ramfli , indicating the high instability of these genotypes. Among the individual Z values, it was found that genotypes Ramfi TCXA, Uzbakestan Moscat, Bli Ramfi, Apozoski Ramfi and Anapiski Ramfli were significantly stable relative to the others, of whi ch the Z i (1) and Z i (2) values were greater than the table χ 2 (0.05, 1) (3.84). The genotypes Skieve and Gezgiski Ramfi ran ked the first and second, respectively, according to S i (3) , while, according to S i (6) , genotypes Skieve and Uzbakestan Moscat ranked the first and second, resp ectively. Genotypes Uzbakestan Moscat, Bli Ramfi and Kishmish Ramfi Azos, respecti vely, had the highest stability and lowest changes in different environments and were r ecommendable as stable genotypes in different areas . But, it should be noted that yield of these genoty pes was moderate . Genotype Muscat had a high yield and moderate stabi lity. As a result, these genotypes (Uzbakestan Moscat, Bli Ramfi, Skieve, Muscat and K ishmish Ramfi Azos) indicated greater resistance to environmental fluctuation and , therefore, increasing specificity of adaptability to low yielding environments. Keywords: Adaptation, Biplot, Multi-environmental trials, Ran king, Stability Analysis.