SINGLE NUCLEOTIDE POLYMORPHISM (SNP) MARKER DISCOVERY AND GENETIC MAPPING ASSOCIATED WITH RESISTANCE TO BEAN GOLDEN YELLOW MOSAIC VIRUS

INTRODUCTION: Bean Golden Yellow Mosaic Virus (BGYMV) is a severe disease of common bean (Phaseolus vulgaris L.) that causes important yield losses. BGYMV is a geminivirus (family Geminiviridae) transmitted by Whitefly in tropical and sub-tropical countries of Latin America and the Caribbean. Breeding for resistance to the virus has been the most effective strategy for controlling the disease. One resistance source, A429, derived from the Durango landrace Garrapato (G2402), and subsequent DOR lines developed at CIAT, were shown to contain a single recessive gene, bgm-1, which reduces mosaic and yellowing symptoms. The marker SR2 has been used in marker-assisted selection programs because it is linked to the bgm-1 gene for resistance to BGYMV. In this study, SNP markers were developed from Genotyping by Sequencing (GBS) data on the region associated with the bgm-1 gene. These SNPs markers could constitute an important tool for marker-assisted selection programs for improvement of common bean cultivars with resistance to BGYMV