Detection of Resistance against Leaf Spot, Yellow Mosaic and Urdbean Leaf Crinkle Viruses in Mash Bean (Vigna mungo)

Among foliar diseases Leaf spot, yellow mosaic virus (YMV) and Urd bean leaf crinkle virus (ULCV) are destructive diseases of mash bean (Vigna mungo) in Pakistan. Incorporation of resistance against biotic stress in plants is traditional strategy of crop improvement through breeding. Effective breeding for biotic stresses entails readily accessible resistant germplasm. 67 genotypes were evaluated for multi disease resistance was tested for two consecutive years (2019 and 2020) at Barani Agricultural Research Institute, Chakwal. Experiment was repeated with an idea to decrease the effect of environment and those material was selected which performed same in both years. Out of 67 genotypes 12 were resistant against leaf spot infection and 19 genotypes were found highly resistant against yellow mosaic virus during both years. In case of ULCV disease did not appear during 2020. However, 19 genotypes showed resistance against ULCV during first year of experiment. Two genotypes namely 3CM-703 and 4CM-720 exhibited resistance response to all foliar diseases under study. Three genotypes viz. 4CM-716, 4CM-720, 5CM-708 demonstrated resistance against YMV as well as leaf spot. 4CM716, 4CM720, 5CM708, 7CM701, 7CM702, 7CM704, 7CM705, 7CM706 expressed resistance against leaf spot and ULCV simultaneously. The data generated is useful for improvement of mash bean through breeding.