Data/hora: 10/06/2024 17:02:03

Provedor de dados: | 65
País: | Brazil
Título: | Performance of testers with different genetic structure for evaluation of maize inbred lines
Autores: | Guimarães,Lauro José Moreira; Miranda,Glauco Vieira; DeLima,Rodrigo Oliveira; Maia,Ciro; Oliveira,Lucimar Rodrigues de; Souza,Leandro Vagno de.
Data: | 2012-05-01
Ano: | 2012
Palavras-chave: | Zea mays; Diallel; Testcross; Combining ability.
Resumo: | The objective of this study was to evaluate four maize testers for identification of superior inbreed lines in testcross. The four testers evaluated are cultivars with narrow or wide genetic base (single-cross hybrids and open pollinated varieties) and two kernel types (flint or dent). SynD and SynF testers are open pollinated varieties with dent and flint kernels, respectively, and FSH and DSH testers are single-cross hybrids with flint and dent kernels, respectively. SynD tester showed the biggest genetic variance among the maize inbreed lines in crosses. The effects of general combining ability (GCA) for lines and specific combining ability (SCA) for lines x testers were significant, whereas GCA effects for testers were not significant. SynD and SynF testers identified the largest number of lines with higher GCA. The DSH and FSH testers showed suitable to identify lines with high SCA. It was concluded that SynD and SynF testers are adequate to identify inbreed lines with high GCA effects, and it's possible to identify new lines with high heterotic potential in each one of the four testers.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000500002
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/S0103-84782012000500002
Formato: | text/html
Fonte: | Ciência Rural  v.42 n.5 2012
Fonte: | info:eu-repo/semantics/openAccess