Potyvirus

Potyviruses infect plants and belong to the family Potyviridae. The genus is named after the type virus - Potato virus Y.
Potyviruses, like begomoviruses, account for ~30% of the currently known plant viruses and have at least 180 definitive and possible members. Members of this genus may cause significant losses in agricultural, pastoral, horticultural and ornamental crops.
There are 73 described genera of plant viruses.
More than 200 species of aphids spread potyviruses and most are from the subfamily Aphidinae (genera Macrosiphum and Myzus).
Evolution
The potyviruses evolved between 6,600 to 7,250 years ago. They appear to have evolved in southwest Eurasia or north Africa. The estimated mutation rate is about 1.15×10−4 nucleotide substitutions/site/year.
Virology
The virion is non-enveloped with a filamentous nucleocapsid, 680 to 900 nanometers (nm) long and is...