Soybean Dwarf Virus: Experimental Host Range, Soybean Germ Plasm Reactions, and Assessment of Potential Threat to U.S. Soybean Production

Abstract

Current and recent public cultivars, miscellaneous commercial cultivars, ancestral lines of Glycine max, and a broad range of leguminous and nonleguminous species were evaluated for susceptibility to strains of soybean dwarf virus (SDV). Most susceptibile hosts were found within the Fabaceae with a few susceptible species in the Chenopodiaceae and Polemoniaceae. There was greater similarity in symptoms and host range between the yellowing strain of SDV (SDV-Y) and the subterranean clover red leaf strain of SDV from New Zealand (SDV-NZ) than between SDV-Y and SDV-D (dwarfing strain). Soybean dwarf virus does not appear to pose an economic threat to U.S. soybean production, but it or virus strains closely related to it may be the cause of widespread disease in forage legumes.