Reappraisal of the Genus () Worldwide Based on Multi-Gene Phylogeny, Morphology and Biogeography, and Insights on .

The boletoid genera and have recently been suggested by some researchers to constitute a single genus, and was merged into as a later synonym. However, no convincing arguments have yet provided significant evidence for this congeneric placement. In this study, we analyze material from species and closely related taxa to assess taxonomic and phylogenetic boundaries between these genera and to clarify species delimitation within .

Molecular analysis of soybean dwarf virus isolates in the eastern United States confirms the presence of both D and Y strains and provides evidence of mixed infections and recombination.

Soybean dwarf virus (SbDV), first identified as an agricultural problem in Japan, has emerged as a growing problem in the Midwestern United States. The majority of research on SbDV had been limited to four lab maintained strains from Japan. SbDV had been found in clover in the eastern United States, but these isolates rarely emerged into soybeans.