title: Genotypic stability and adaptability in tropical maize based on AMMI and GGE biplot analysis.
abstract: We evaluated the phenotypic and genotypic stability and adaptability of hybrids using the additive main effect and multiplicative interaction (AMMI) and genotype x genotype-environment interaction (GGE) biplot models. Starting with 10 single-cross hybrids, a complete diallel was done, resulting in 45 double-cross hybrids that were appraised in 15 locations in Southeast, Center-West and Northeast Brazil. In most cases, when the effects were considered as random (only G effects or G and GE simultaneously) in AMMI and GGE analysis, the distances between predicted values and observed values were smaller than for AMMI and GGE biplot phenotypic means; the best linear unbiased predictors of G and GE generally showed more accurate predictions in AMMI and GGE analysis. We found the GGE biplot method to be superior to the AMMI 1 graph, due to more retention of GE and G + GE in the graph analysis. However, based on cross-validation results, the GGE biplot was less accurate than the AMMI 1 graph, inferring that the quantity of GE or G + GE retained in the graph analysis alone is not a good parameter for choice of stabilities and adaptabilities when comparing AMMI and GGE analyses.
authors: Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brasil. marciobalestre@hotmail.com
authors: M
authors: M
authors: Balestre
authors: R G
authors: RG
authors: Von Pinho
authors: J C
authors: JC
authors: Souza
authors: R L
authors: RL
authors: Oliveira
mesh_terms: D000222:Adaptation, Physiological; D003433:Crosses, Genetic; D008957:Models, Genetic; D003313:Zea mays / Q000235:genetics* / Q000502:physiology