Phenotypic and molecular characterization of cultivar BRSMG-Talismã regarding the principal common bean pathogens

Abstract

Information about common bean cultivars recommended for commercial use in Brazil regarding the reaction to pathogens is essential for farmers besides furthering future breeding efforts. Our research evaluated the reactions of the common bean cultivar BRSMG-Talismã to several pathotypes evaluated of Uromyces appendiculatus, Colletotrichum lindemuthianum and Phaeoisariopsis griseola. The cultivar was further characterized through RAPD and SCAR molecular markers used in the marker-assisted selection (MAS) in the bean breeding program of BIOAGRO/UFV which deals with gene pyramiding of rust, anthracnose and angular leaf spot resistance genes. Results showed that BRSMG-Talismã is susceptible to different genotypes of the tested pathogens. All analyzed molecular markers were polymorphic, between BRSMG-Talismã and the resistance sources. Consequently, these markers can be used to monitor a simultaneous introgression of genes with a broad resistance spectrum into the genetic background of BRSMG-Talismã.