Quantitative Trait Loci (QTL) Detection and Validation of Linked Markers Associated with Yellow Mosaic Virus Resistance in Urdbean [Vigna mungo (L.) Hepper] in Andhra Pradesh

Background: The YMD is one of the serious viral diseases in blackgram and being transmitted by whitefly (Bemisia tabaci). development YMV resistant varieties important aspects for sustainable production. Marker assisted selection genetic transformation could be utilized developing genotypes. Methods: We attempted to map QTLs governing resistance employing parents i.e., PBG32 (susceptible) PU31 (resistant). Parental polymorphic studies were conducted using 147 SSR markers genotyping phenotyping data used QTL mapping. markers, CEDG097 CEDG172 that flanked qYMV1 validated 25 Result: showed 16% polymorphism between parents. By F2 genotypic data, linkage was constructed total length observed 335.47 cm. Single (qYMV1) tolerance detected located with LOD score value 2.76. PVE 13.10% tightly linked (0 cM) left flanking marker CEDG97, which denotes a major QTL. Genotyping known genotypes 91% susceptible disease reaction exhibited 74% reaction. alleles (PU31 allele) both i.e. recorded VBN7, LBG922, LBG933 TBG130-1 hence, these can considered as potent also donor breeding programmes.