The genotype by environment (G×E) interaction has an impact on the selection of genotypes. The yield productivity of 49 wheat (Triticum aestivum L.) genotypes was evaluated using additive main effects and multiplicative Interaction (AMMI) model. Experiments were implemented in four locations (Barrani, Matrouh, Assiut and El-Kharga) across Egypt using a randomized complete block design with three replications.
Analysis of variance for grain yield (g/m2) showed that the sum of squares of locations accounted for 86% of total sum of squares. The AMMI analysis of variance showed that
two interaction principal components (IPCs) out of three were highly significant (P <0.01). The IPC1 and IPC2 accounted for 55.4% and 31.4% of the G×E interaction,
respectively. Genotypes 40 and 48 were well adapted to Assiut location whereas genotype 18 was adapted to Barrani location. The AMMI model identified the best combinations of
genotypes and environments for yield.