Abstract

Understanding of Mungbean Yellow Mosaic Virus resistance is crucial to develop resistant varieties to combat worldwide threat of the disease epidemics. Since there is no stable source of resistance in mungbean it’s essential to take up interspecific hybridization with ricebean in order to introgress resistant genes from ricebean which is highly resistant to MYMV. Green gram variety KKM-3 which is susceptible to MYMV was used as a female parent and two rice bean lines KBR-1 and RBL-6 which are highly resistant to MYMV were used as male parents in generating interspecific hybrids. The inheritance of resistance to Mungbean Yellow Mosaic Virus (MYMV) in interspecific crosses of mungbean and ricebean was studied. F1 interspecific hybrids of the cross KKM-3 × KBR-1were resistant and the cross KKM-3 × RBL-6 were found to be highly resistant. The F2 generations of the two crosses were screened for MYMV and Chi-square test confirmed the segregation ratio of 3:1 resistant: susceptible plants in the F2 generation of both the interspecific crosses indicating that the MYMV resistance in interspecific crosses of mungbean and ricebean is controlled by monogenic dominant gene.