AMMI Model to Assess Durum Wheat Genotypes in Multi-Environment Trials

The goal of this research was to assess the stability and yield performance of ۱۵۰ durum wheat genotypes in multi-environment trials in two locations (Diyarbakir and Kiziltepe), in ۲۰۱۱-۲۰۱۲, and ۲۰۱۲-۲۰۱۳ growing seasons. The trials were designed by Lattice Experimental Design with two replications (incomplete block design). The AMMI (Additive Main Effects and Multiplicative Interaction) and GEI (Genotype×Environment Interaction) analysis were used in the study to estimate GEI effects on grain yield, because of plant breeders’ great interest in these models for breeding programs. AMMI evaluation indicated that genotypes made the most important contributions to treatments Sum of Squares (۵۹.۸%), environments (۳.۵%), and GEI (۳۶.۷%), respectively, suggesting that grain yield had been affected by environment. IPCA ۱ and IPCA ۲ axes (Principal Component) were significant as P< ۰.۰۱ and explained ۶۳.۸ and ۳۶.۲%, respectively. Results showed that Kiziltepe ۲۰۱۳ was more stable and high yielding, meanwhile Diyarbakir ۲۰۱۲ and Diyarbakir ۲۰۱۳ environments were unstable and low yielding. According to stability variance, usually the province lines were more productive and stable than some old cultivars and many landraces/genotypes. Moreover, genotype G۲۴ was more effective in all environments. The GEI model according to AMMI analysis suggested that this genotype can be considered as a candidate, due to extensive adaptability and high performances in all environments.

Keywords:

AMMI , GGE biplot , Rain fed wheat , stability