Data/hora: 10/06/2024 11:28:17

Provedor de dados: | 1
País: | Brazil
Título: | The behavior of maize hybrids generated from contrasting progenies regarding the use of nitrogen
Autores: | Guedes, Fernando Lisboa; Ferreira Junior, Edivaldo José; Castro, Carlos Eduardo Caixeta de; Pereira, Carlos Henrique; Prado, Paulo Eduardo Rodrigues; Souza, João Cândido de.
Data: | 2014-11-25
Ano: | 2014
Palavras-chave: | 5.01.03.05-9 plant breeding; Abiotic stress; Zea mays Melhoramento Vegetal.
Resumo: | The purpose of this study was to evaluate the performance of maize hybrids synthesized from contrasting genotypes with regard to the use of nitrogen that were selected for their performance in topcrosses. Sixty-seven S0:1 progenies derived from the germplasm bank of Ufla were evaluated in topcross combinations with two testers  at two nitrogen levels. The six progenies with the greatest tolerance and responsiveness to nitrogen (RT) and the five with the least tolerance and responsiveness (RnTn) were selected and, were, afterwards, crossed in a complete diallel, for a total of 55 hybrid combinations. The following genetic parameters were estimated: genetic variance among the hybrids (σ^2G), broad sense heritability in the mean of the hybrids, and selective accuracy (r^2gg). It was observed that the genetic parameters were greater in the environments with available nitrogen and that the early selection by performance in topcrosses of progenies tolerant to low N levels may not be made with high intensity. The hybrids tolerant to low N levels were obtained by crossing contrasting parents.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18181

10.4025/actasciagron.v37i1.18181

Editor: | Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18181/pdf_51
Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 45-50

Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 45-50

1807-8621

1679-9275