Abstract
Soybean (Glycine max L. Merr.) adaptation to new environments has been hard to predict based on maturity group. The aim of this study was to evaluate the performance of 14 soybean genotypes, from the Soybean Breeding Program of the Federal University of Uberlandia, in their adaptive capacity and seed yield stability at 3 locations and 2 growing seasons. For the adaptability and stability analysis the Toler and Centroid methods were used; 5 genotypic groups were identified in the first whereas 4 groups were identified in the latter. By the Toler method group A was composed by 4 genotypes, UFU-001, UFU-003, UFU-0010, and UFU-001. They showed a convex pattern of adaptability and stability. In contrast, the genotypes UFU-008 and UFU-0013 were classified in Group E with a concave pattern of adaptability and stability. Regarding results from the Centroid method, the Genotype UFU-002, with higher seed yield than average, was the only genotype in Ideotype VI with moderate adaptability to favorable environments. In contrast, 10 genotypes were included in the Ideotype V, of medium general adaptability. The genotypes UFU-001, UFU-002, UFU-006, UFU-0010, and UFU-0011 were recommended for use in the Brazilian Cerrado growing region. These genotypes had high seed yield potential in high quality environments.
Highlights
The presence of G × E interactions in multi-location evaluation trials leads to the production of genotypes that rank among the best in one location they perform poorly in another
The trials were conducted in 2005/2006 and 2007/2008 growing seasons at 3 locations in Brazil which were at Porangatu—GO, Porto Alegre do Norte—MT and Uberaba—MG. They are part of the Cultivation and Use Value (CUV) network trials of the of the Federal University of Uberlandia breeding program, which aims at improving yield and oil content of soybeans
The genotype UFU-008 was classified by the Toler and Centroid methods as being of low adaptability capacity
Summary
Merr.) crop has been grown in a wide range of latitudes in Brazil ranging from 4 ̊N at Pacaraima—RR to 33 ̊S at Santa Vitoria do Palmar—RS [1]. The main role of soybean breeding programs in Brazil is to develop high-yielding cultivars that are adapted to a variety of growing regions. The presence of G × E interactions in multi-location evaluation trials leads to the production of genotypes that rank among the best in one location they perform poorly in another. This is the main hampering factor in selecting genotypes with a wide adaptability [2]
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