Assessment of genotype × environment interaction for grain protein content in short-season soybean genotypes

The protein content is an important parameter of the technological quality of soybean grain . Therefore, the selection work is aimed at creating a genetic basis for obtaining varieties not only of high yield but also varieties of improved grain quality . In order to provide sustained progress in breeding, it is necessary to find a stable source for breeding for desired traits . The aim of this study was to examine the value of the genotype × environment (G× E) interaction for protein content in 14 Maize Research Institute „Zemun Polje” short-season soybean accessions and to identify stable sources that can be used in breeding for protein content improvement . G×E interaction for grain protein content was analyzed using a linear-bilinear AMMI-1 model . The influence of genotype and environment on the total variation of protein content was approximately equal, while the smallest variation is attributed to genotype x environment interaction . A large number of genotypes with different protein content (Korana, PI 180 507, Kabott, Krajina, Canatto) showed a small contribution to the interaction in studied environments, the most important of which were genotypes with above-average protein content, as potential sources for future breeding programs .