Urdbean has narrow genetic base due to common ancestry of various superior genotypes, poor plant type and genetic vulnerability to biotic and abiotic stresses. The underutilized related specie, V. umbellata (ricebean), nutritive and resistant to most of the fungal pathogens, is speculated to be potential donor. Therefore, V. mungo and V. umbellata were crossed with a view to introgress alien genes. On inter-specific hybridization, the presence of pre-fertilization barriers and post-fertilization barriers were observed. As, hybrids exhibited reduced germination and sterility. The frequency of hybridization, radicle and plant production percentage among three cross combinations revealed genotype specific response between both the species. | Alien introgression studies involving vigna mungo x vigna umbellata hybridization
