Inheritance of resistance to soybean mosaic virus in Phaseolus vulgaris

In cross and backcross populations of the bean cultivar Great Northem 1140 (resistant to soybeam mosaic virus (SMV)) with the susceptible line Black Turtle 2 (a selection of Black Turtle Soup), resistance was conferred by a single but incompletely dominant gene (Smv). In seed lots of individual plants of SMV infected Black Turtle 2 and the cultivar Pioneer, which had been kept in storage for more than a year, virus transmission ranged from 0 to 4 percen