Table 1. Characteristics of the family Potyviridae.

Typical member:	potato virus Y-O (U09509), species Potato virus Y, genus Potyvirus
Virion	Non-enveloped, flexuous and filamentous capsid, 680–900 nm long and 11–20 nm in diameter with a single core capsid protein
Genome	8–11 kb of positive-sense, single-stranded, usually monopartite RNA (bipartite in the genus Bymovirus)
Replication	Cytoplasmic, initiated in virus replication complexes on membranous vesicles at ER exit sites. Replication initiates at 6K2-induced ER-originated vesicles
Translation	Directly from genomic RNA
Host range	Plants (all virus genera). Most members are arthropod-borne but those of the genus Bymovirus are transmitted by plasmodiophorids
Taxonomy	Currently eight genera containing nearly 200 species