M. Balestre, R.G. Von Pinho, J.C. Souza, R.L. Oliveira
Published: November 03, 2009
Genet. Mol. Res. 8 (4) : 1311-1322
DOI: https://doi.org/10.4238/vol8-4gmr658
Cite this Article:
M. Balestre, R.G. Von Pinho, J.C. Souza, R.L. Oliveira (2009). Genotypic stability and adaptability in tropical maize based on AMMI and GGE biplot analysis. Genet. Mol. Res. 8(4): 1311-1322. https://doi.org/10.4238/vol8-4gmr658
About the Authors
M. Balestre, R.G. Von Pinho, J.C. Souza, R.L. Oliveira
Corresponding author
M. Balestre
E-mail: marciobalestre@hotmail.com
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.
Key words: BLUP, AMMI, GGE biplot, Cross-validation.