Data/hora: 04/06/2024 02:27:29

Provedor de dados: 	102	
País: 	Brazil	
Título: 	Genetic linkage map of Phaseolus vulgaris and identification of QTLs responsible for resistance to Xanthomonas axonopodis pv. phaseoli	
Autores: 	Santos,Amaury S.; Bressan-Smith,Ricardo E.; Pereira,Messias G.; Rodrigues,Rosana; Ferreira,Claudia F.	
Data: 	2003-01-01	
Ano: 	2003	
Palavras-chave: 	Common bean; Quantitative trait loci; Common bacterial blight; Disease resistance.	
Resumo: 	Common bean (Phaseolus vulgaris) cultivars with a high degree of resistance to Xanthomonas axonopodis pv. phaseoli (Xap) are not available in Brazil. Despite many studies, a low degree of resistance to Xap continues to exist due to its complex genetic inheritance, which is not well known. The objectives of this research were to complement a common bean genetic map based on the cross between a susceptible genotype 'HAB-52' and a resistant genotype 'BAC-6', and to map and analyze genomic regions (quantitative trait loci – QTLs) related to Xap resistance. Eleven linkage groups were determined using 143 RAPD markers, covering 1,234.5 cM of the genome. This map was used to detect QTLs associated with Xap resistance on leaves and pods. The averages of disease severity on leaves (represented by the transformed disease index – TDI) and pods (represented by the diameter of lesion on pods – DLP) were added to the data of the linkage map. Five TDI QTLs and only one LDP QTL were detected. The TDI QTLs were placed in the A, B, G and J linkage groups, with phenotypic variations ranging from 12.7 to 71.6%. The DLP QTL explained 12.9% of the phenotypic variation and was mapped in a distinct linkage group. These results indicate that there are different genes involved in the control of resistance on leaves and pods.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582003000100001	
Editor: 	Sociedade Brasileira de Fitopatologia	
Relação: 	10.1590/S0100-41582003000100001	
Formato: 	text/html	
Fonte: 	Fitopatologia Brasileira  v.28 n.1 2003	
Fonte: 	info:eu-repo/semantics/openAccess