Salt tolerance in mungbean genotypes for MYMV and grain yield

Eight genotypes of mungbean [Vigna radiata (L.) Wilczek] of diverse genetic origin along with 3 farmers’ preferred varieties were screened for salt tolerance with respect to incidence of mungbean yellow mosaic virus (MYMV) and grain yield at 4 p H levels (8.0, 8.5, 9.0 and 9.5) during rainy, 2018 and summer, 2019. Observations on MYMV were recorded on 1-5 scale, 1 being resistant and 5 being susceptible. The genotypes exhibited significantly variable response towards salt tolerance. Salt stress along with high temperature and osmotic stress severely limited the yield during summer, but the average reduction in the measured and observed traits was less during rainy season. The reduction in the traits was observed at higher p H levels. Moreover, this reduction was highly substantial at p H 9.5 as compared to p H 8.5. Genotype EC 88 had significantly higher yield along with resistance to MYMV in both the seasons. Observations further suggested that screening of genotypes for salt tolerance during summer season was more effective than rainy season.