Submitted to: International Congress of Virology
Publication Type: Abstract Only
Publication Acceptance Date: April 10, 1999
Publication Date: August 6, 1999
Citation: Berger, P., Hammond, J., Stenger, D.C. 1999. Taxonomy of the potyviridae. International Congress Of Virology. (Meeting-not published.) Technical Abstract: The Potyviridae have been expanded from what was previously a family of thr genera to 6 genera: Bymovirus, Ipomovirus, Macluravirus, Potyvirus, Rymovirus, and Tritimovirus. These genera are differentiated on the basis mode of vector transmission, primary sequence relationships, and in the cas of the bymoviruses, a bipartite genome. The genus Potyvirus contains numerous aphid-transmitted species; currently there are 95 definitive and tentative members. Species of the genus Rymovirus are most closely relate to members of the genus Potyvirus, but are transmitted by eriophyid mites. The genera Ipomovirus, Macluravirus, and Tritimovirus were recently established to account for significant sequence differences from other gene in the family. The one definitive member of the genus Ipomovirus (type vir = sweet potato mild mottle) is transmitted by the whitefly Bemisia tabaci; is another tentative member. The genus Macluravirus (type virus = maclura amosaic) has two definitive members that are aphid-transmitted, but are mos closely related to fungal-transmitted species of the genus Bymovirus. Sequence comparisons indicate that two eriophyid mite-transmitted species formerly included in the genus Rymovirus represent a distinct clade of the family Potyviridae, and are now classified as members of the genus Tritimovirus (type virus = wheat streak mosaic).