AMMI and GGE Biplot Analysis of Genotype-Environment Interaction in Environmental Trials of Pea Cultivars

Results of AMMI and GGE biplot analysis summarizing data of environmental trials of pea cultivars are presented. The results of these methods were not identical and indicate the importance of each of these algorithms. Thus, the distribution of pea accessions by ranks (ASV) in the AMMI model placed cv. ‘Haiduk’ in the first position, but according to the results of the GGE biplot analysis, cv. ‘Oplot’ was the best ("ideal") genotype. Graphical visualization of results marking megaenvironments and cultivars that are the best in these environments is additional information to adjust breeding programs and to create adaptable pea cultivars for different growing zones. A separate advantage of GGE biplot is that it is able to assess the informativeness of test environments. In our study, not only the trial locations (Odesa State Experimental Station [Odeska Oblast], Ustymivka Experimental Station [Poltavska Oblast] and Yuriev Plant Production Institute [Kharkivska Oblast]) but also each year of trials at each location differed. Thus, AMMI and GGE biplot analysis, which process data of environmental trials of pea, do not exclude each other, but on the contrary, provide more detailed and complete information.