Abstract
This study was conducted on fifteen genotypes of bread wheat (Triticum aestivum L.) in three ecological sites within the first environmental area (rain-fed conditions) in Syria during 2019/2020 season. The experiment was designed according to a randomized complete block design (RCBD) in three replicates at each site, with the aim of identifying stable high-yield genotypes, the ideal environment, and the appropriate genotype for each environment, using Additive Main Effect and Multiplicative Interaction (AMMI) and GGE Biplot models. AMMI demonstrated significant interactions in G, E, and E×G. The principal components PC1 and PC2 explained 100% of the total variance, with the contribution of PC1 being 70.1% and PC2 29.9%. According to the AMMI biplot analysis, the G4, G1 and G6 genotypes were the most productive, and G3 the most stable, while the G15, G10 and G11 genotypes were the least stable. According to GGE Biplot analysis, E2 was the ideal environment compared to the rest of the tested environments, and G6 and G1 were the ideal genotypes, which indicates the importance of these two genotypes and the necessity of investing them in improving grain yield and stability. "which-won-where" analysis showed that the G4 and G8 genotypes had high yields in both E1 and E2 environment, while G1 was suitable for the E3 environment, G15 and G2 were unsuitable for any of the assessed environments.
| Keywords: | Yield stability Principal components Multiplicative interaction AMMI stability value Ideal genotype |