Resistance to barley yellow dwarf virus in a spring oat genotype was manifested as a reduction in accumulation or viral antigen in whole plants. The resistance was quantified for five isolates or BYDV from New York (MAV, PAV, SGV, RPV, and RMV) and round to be BYDV isolate specific. Similar levels or resistance were quantified for MAV, PAV, and SGV in which the reduction in viral antigen ranged from 58-63 percent, relative to levels in a susceptible genotype. RMV antigen was reduced up to 82 percent, but no resistance was expressed against the RPV isolate. Reduced viral antigen was correlated with reduced levels or transmission or MAV, PAV, SGV, and RMV, but not RPV. Further reductions in transmission efficiency were possible by limiting the acquisition access period [...]
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Stewart M. Gray (1993) studied this question.