ISSN 1392-3196 / e-ISSN 2335-8947
Zemdirbyste-Agriculture, vol. 102, No. 4 (2015), p. 431–436
GGE biplot analysis of genotype by environment interaction of spring barley varieties
Pavel SOLONECHNYI, Nataliya VASKO, Aleksey NAUMOV, Olga SOLONECHNAYA, Olga VAZHENINA, Olga BONDAREVA, Yuriy LOGVINENKO
The article presents results of genotype (G) main effect and genotype by environment (GE) interaction (G × GE) biplot analysis of a multi environmental trial (MET) data in 17 varieties of spring barley conducted in 2013–2014. The objective of this study was to determine the effects of genotype, environment and their interaction on grain yield and to identify stable spring barley genotypes. The experimental layout was a randomized complete block design with three replications in each environment. Combined ANOVA indicated that the main effects due to environments, genotypes and genotype by environment interaction were highly significant. The contribution of environment, genotype and genotype by environment interaction to the total variation in grain yield was about 88.05, 3.61 and 7.54 %, respectively. The G × GE effects were further partitioned using a GGE biplot model. The first two principal components obtained by singular value decomposition of the centred data of yield accounted for 88.50% of the total variability caused by G × GE. Out of these variations, PC1 and PC2 accounted for 51.38% and 37.12% of variability, respectively. The first mega-environment contains environments E1, E3 and E4 with variety ‘Donetskyy 15’ producing the highest yield; the second mega-environment only contains environment E2 with variety ‘Vzirets’ being the most yielding. According to the biplot analysis of the “ideal” environment, it was concluded that E1 was the closest to the “ideal” environment and, therefore, the most desirable of all the test environments. GGE biplot view of this study identified the most productive and stable varieties – ‘Donetskyy 14’, ‘Kosar’ and ‘Alegro’. Variety ‘Stepovyk’ is noticeable for its maximum fidelity to the “ideal” genotype in terms of performance and stability.
Key words: GGE (genotype plus genotype by environment interaction) biplot, Hordeum vulgare, multi environment trials, yield.
Full text: 102_4_str55.pdf