Data/hora: 13/06/2024 00:55:24

Provedor de dados: | 64
País: | Brazil
Título: | Combining ability between common bean gene groups for root distribution trait
Autores: | Cerutti,Paulo Henrique; Grigolo,Sibila; Melo,Rita Carolina de; Fioreze,Ana Carolina da Costa Lara; Guidolin,Altamir Frederico; Coimbra,Jefferson Luís Meirelles.
Data: | 2020-01-01
Ano: | 2020
Palavras-chave: | Gene action; Andean and mesoamerican gene pool; Diallel analysis.
Resumo: | ABSTRACT When different gene groups are combined by hybridization, the expression of predominant genes for a trait must be known. This understanding is fundamental to the decisions made by breeders in the stages of cultivation and selection of segregating populations during the breeding program. Thus, the objective of this study was to determine the effects of combining ability and gene action for the root distribution traits of the Andean and Mesoamerican common bean gene groups. Six common bean parents from the Andean and Mesoamerican groups were hybridized in a complete diallel mating scheme, resulting in 30 F1 hybrids. The parents and hybrids were planted in the field in a simple lattice design. The target trait was root distribution, calculated as the relative number of roots in the topsoil. The effect of the general combining ability was significantly higher than that of the specific combining ability (58%) and the reciprocal effect (41%). Particularly, the combination estimates were modified according to the order of the gene groups used. The combinations IPR Uirapuru x BAF53 (Mesoamerican x Andean), BAF53 x CBS14 (Andean x Andean), and CBS14 x IPR Uirapuru (Andean x Mesoamerican) mainly exhibited an increase in the mean root distribution. However, the highest fraction of genetic variance correlated with additive components (60%), even in crosses involving different gene groups. Consequently, the additive gene action was predominant in the expression of root distribution trait in common bean, irrespective of the gene group used.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100226
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/1413-7054202044011520
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.44 2020
Fonte: | info:eu-repo/semantics/openAccess