ISSR and SCAR markers linked to the mungbean yellow mosaic virus (MYMV) resistance gene in blackgram [Vigna mungo (L.) Hepper]

AbstractA recombinant inbred line (RIL) mapping population (F8) was generated by crossing Vigna mungo (cv. TU 94‐2) with Vigna mungo var. silvestris and screened for mungbean yellow mosaic virus (MYMV) resistance. The inter simple sequence repeat (ISSR) marker technique was employed to identify markers linked to the MYMV resistance gene. Of the 100 primers screened, 54 showed amplification of which 36 exhibited polymorphism between the parents TU 94‐2 (resistant) and V. mungo var. silvestris (susceptible). Individual plants from 53 RIL populations were analysed and one marker (ISSR8111357) was identified as tightly linked to the MYMV resistant gene at 6.8 cM. Both the phenotype as well as the ISSR8111357 marker segregated in a 1 : 1 ratio. The ISSR8111357 marker was sequenced and sequence characterized amplified region (SCAR) primers were designed (YMV1‐F and YMV1‐R) to amplify the marker. Screening for the SCAR marker in the RIL population distinguished the MYMV resistant and susceptible plants, agreeing well with the phenotypic data. The ISSR8111357 marker was validated using diverse blackgram genotypes differing in their MYMV reaction. The marker will be useful for the development of MYMV‐resistant genotypes in blackgram.