Response of mungbean genotypes for resistance against mungbean yellow mosaic virus

Mungbean yellow mosaic virus (MYMV) is an important viral disease across mungbean growing areas and causes severe yield loss in mungbean especially during the spring/summer season. The present study was envisaged to identify MYMV donors in mungbean. A total of 104 mungbean genotypes were evaluated for MYMV under natural field conditions during summer, 2019. The results revealed that MYMV severity ranged from 0% to 100% among mungbean genotypes. Out of 104 genotypes, 32 genotypes were completely free from MYMV, two genotypes exhibited resistant reaction (R), 22 genotypes were found moderately resistant (MR) and the remaining 48 genotypes were susceptible to highly susceptible reaction to MYMV. Thus, the identified 34 promising lines of mungbean were further evaluated against MYMV along with susceptible check DGGV-2 under epiphytotic conditions during the summer of 2020 and 2021. Pooled data of MYMV over the two years indicated that six genotypes namely, IPM-1205-2, IPM-2-14, IPM-410-3, IPM14-10, IPM-205-7 and IPM-1604-1 were showed stability for MYMV resistance. These identified stable resistant genotypes will serve as potential donors for the mungbean breeding program to develop resistance cultivars.