Abstract
Potato virus Y (PVY) is one of the rare plant viruses for which some biological traits (host range and symptomatology) are highly correlated with phylogeny, allowing the reconstruction of the evolutionary history of these traits. In this article, a new lineage of PVY isolates from Chile is described, showing unique genomic and biological properties. This lineage was found to be the sister group of all other PVY isolates and helped in the reconstruction of the ancestral traits and evolutionary history of PVY, suggesting that veinal necrosis in tobacco is an ancestral state and that adaptation to pepper (Capsicum spp.) and potato (Solanum tuberosum) has been modified several times during PVY history.
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