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Phylogeny of StrVA, tombusviruses, and other related viruses based on the RNA polymerase protein. All branches with less than 0.9 support are collapsed. The scale is shown in the lower right corner. Viruses officially recognized as species by ICTV are in bold; genera are color-coded. The accession numbers of the sequences used are shown in Table S1. For StrVA and related viruses, putative ribosomal frameshifting is annotated as shaded or unshaded arcs.
