Open AccessQuantitative Resistance to Bean dwarf mosaic virus in Common Bean Is Associated with the Bct Gene for Resistance to Beet curly top virus
Author(s) -
P.N. Miklas,
Young-Su Seo,
R. L. Gilbertson
Publication year - 2009
Publication title -
plant disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.663
H-Index - 108
eISSN - 1943-7692
pISSN - 0191-2917
DOI - 10.1094/pdis-93-6-0645
Subject(s) - begomovirus , biology , phaseolus , virus , locus (genetics) , plant virus , gene , leafhopper , whitefly , geminiviridae , virology , genetics , botany , hemiptera
The dominant resistance gene, Bct, in common bean (Phaseolus vulgaris) confers qualitative resistance to Beet curly top virus, a leafhopper-transmitted geminivirus in the genus Curtovirus. To determine whether this gene confers resistance to other geminiviruses, bean plants of a recombinant inbred population were sap-inoculated with Bean dwarf mosaic virus (BDMV), a whitefly-transmitted bipartite begomovirus in the genus Begomovirus. Results indicated that Bct (or tightly linked gene) is associated with quantitative resistance to BDMV; thus, the Bct locus is associated with resistance to a bean-infecting begomovirus and curtovirus. The difference in the nature of the resistance to these geminiviruses may indicate a role for minor genes in begomovirus resistance or differences in the virus–host interaction. The Bct locus, whether it acts alone or represents a cluster of tightly linked genes, will be useful in breeding for broad-spectrum begomovirus resistance in common bean.