Title:	Effects of using phenotypic means and genotypic values in GGE biplot analyses on genotype by environment studies on tropical maize (Zea mays).
Authors:	GRANATO, I. S. C. FRITSCHE-NETO, R. RESENDE, M. D. V. de SILVA, F. F.
Affiliation:	I. S. C. Granato, Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”; R. Fritsche-Neto, Departamento de Genética, Escola Superior de Agricultura “Luiz de Queiroz”; MARCOS DEON VILELA DE RESENDE, CNPF; F. F. Silva, Departamento de Zootecnia, Universidade Federal de Viçosa.
Date Issued:	2016
Citation:	Genetics and Molecular Research, v. 15, n. 4, gmr.15048747, Oct. 2016.
Description:	The objective of this study was to examine the effects of the type and intensity of nutritional stress, and of the statistical treatment of the data, on the genotype x environment (G x E) interaction for tropical maize (Zea mays). For this purpose, 39 hybrid combinations were evaluated under low- and high-nitrogen and -phosphorus availability. The plants were harvested at the V6 stage, and the shoot dry mass was estimated. The variance components and genetic values were assessed using the restricted maximum likelihood/best linear unbiased prediction method, and subsequently analyzed using the GGE biplot method. We observed differences in the performances of the hybrids depending on both the type and intensity of nutritional stress. The results of relationship between environments depended on whether genotypic values or phenotypic means were used. The selection of tropical maize genotypes against nutritional stress should be performed for each nutrient availability level within each type of nutritional stress. The use of phenotypic means for this purpose provides greater reliability than do genotypic values for the analysis of the G x E interaction using GGE biplot.
Thesagro:	Zea mays Milho Nutriente mineral
NAL Thesaurus:	Corn Nutrient use efficiency
Keywords:	Maize Nitrogen-use efficiency Phosphorous-use efficiency Mixed model Principal component Modelo mixto
DOI:	http://dx.doi.org/10.4238/gmr.15048747
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPF)