Data/hora: 02/06/2024 15:59:33

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 23/10/2012
Data da última atualização: | 20/02/2015
Autoria: | FRITSCHE-NETO, R.; DOVALE, J. C.; LANES, É. C. M. de; RESENDE, M. D. V. de; MIRANDA, G. V.
Afiliação: | ROBERTO FRITSCHE-NETO, UFV; JULIO CÉSAR DOVALE, UFV; ÉDER CRISTIAN MALTA DE LANES, UFV; MARCOS DEON VILELA DE RESENDE, CNPF; GLAUCO VIEIRA MIRANDA, UFV.
Título: | Genome-wide selection for tropical maize root traits under conditions of nitrogen and phosphorus stress.
Ano de publicação: | 2012
Fonte/Imprenta: | Acta Scientiarum. Agronomy, Maringá, v. 34, n. 4, p. 389-395, Oct./Dec. 2012.
Idioma: | Inglês
Conteúdo: | The objective of this study was to verify the accuracy of the Genome-Wide Selection (GWS) method in tropical maize breeding for root traits under conditions of nitrogen and phosphorus stress. Forty-one single-crosses were evaluated in two experiments. The first experiment considered low nitrogen availability, and the second experiment considered low phosphorus availability. A randomized block design with two replicates was used. The lateral and axial root lengths were measured using WinRhizo software. The analysis of deviance was calculated using the Restricted Maximum Likelihood/Best Linear Unbiased Prediction (REML/BLUP) method. Eighty microsatellite markers were used to genotype the estimation population. The Random Regression method was used to analyze the GWS (RR-BLUP/GWS) data. The gains per unit time of the GWS and the phenotypic selection method were compared, as the standard phenotypic selection methods were considered to be the Recurrent Selection. The GWS accuracy was higher than the phenotypic selection accuracy for all of the traits evaluated. Thus, the GWS method may significantly increase the genetic gains for root traits that are obtained in tropical maize breeding programs for nutritional stress conditions.
Thesagro: | Fósforo; Milho; Nitrogênio; Raiz; Seleção Genética.
Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (50402-1) - UPC - AP - DD -  -  -  - DIS