Genetics, molecular dissection and identification of high yielding disease resistant lines to MYMV in blackgram (Vigna mungo)

The productivity of blackgram is very low which is mainly due to losses caused by several biotic stresses. Among the biotic stresses mungbean yellow mosaic virus (MYMV) is the most serious disease on this crop with an estimated yield loss of 100% under severeconditions. In this context, study of genetics of resistance to MYMV need smajor attention. In this paper, we reported genetics of the resistance to MYMV disease in blackgram using a F₂ and F₃ populations derived from a cross between the susceptible but agronomically superior parent TAU-1 and the resistant parent BDU-4. The parents, F₁, F₂, F₃ populations were evaluated for MYMV resistance against the virus in artificial condition. The population size in F₂ was three hundred. The results suggested that the MYMV resistance in blackgram is governed by a single dominant gene. Out of 610 SSR and RGA markers screened 24 were found to be polymorphic between two parents. Based on phenotyping in F₂ and F₃ generations nine high yielding disease resistant lines have been identified.