Heterosis is prevalent for multiple traits in diverse maize germplasm.
PLoS One
; 4(10): e7433, 2009 Oct 13.
Article
em En
| MEDLINE
| ID: mdl-19823591
ABSTRACT
BACKGROUND:
Heterosis describes the superior phenotypes observed in hybrids relative to their inbred parents. Maize is a model system for studying heterosis due to the high levels of yield heterosis and commercial use of hybrids.METHODS:
The inbred lines from an association mapping panel were crossed to a common inbred line, B73, to generate nearly 300 hybrid genotypes. Heterosis was evaluated for seventeen phenotypic traits in multiple environments. The majority of hybrids exhibit better-parent heterosis in most of the hybrids measured. Correlations between the levels of heterosis for different traits were generally weak, suggesting that the genetic basis of heterosis is trait-dependent.CONCLUSIONS:
The ability to predict heterosis levels using inbred phenotype or genetic distance between the parents varied for the different traits. For some traits it is possible to explain a significant proportion of the heterosis variation using linear modeling while other traits are more difficult to predict.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Zea mays
/
Vigor Híbrido
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article