Fine Mapping of Ur-3, a Historically Important Rust Resistance Locus in Common Bean.

ABSTRACT: Bean rust, caused by Uromyces appendiculatus, is a devastating disease of common bean (Phaseolus vulgaris) in the Americas and Africa. The historically important Ur-3 gene confers resistance to many races of the highly variable bean rust pathogen that overcome other rust resistance genes. Existing molecular markers tagging Ur-3 for use in marker-assisted selection produce false results. Here, we describe the fine mapping of the Ur-3 locus for the development of highly accurate markers linked to Ur-3 An F₂ population from the cross Pinto 114 (susceptible) × Aurora (resistant with Ur-3) was evaluated for its reaction to four different races of U. appendiculatus A bulked segregant analysis using the SNP chip BARCBEAN6K_3 place

SUBMITTER: Hurtado-Gonzales OP 

PROVIDER: S-EPMC5295601 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature