Identification of a novel vitivirus from grapevines in New Zealand
We report a sequence of a novel vitivirus from Vitis vinifera obtained using two high-throughput sequencing (HTS) strategies on RNA. The initial discovery from small-RNA sequencing was confirmed by HTS of the total RNA and Sanger sequencing. The new virus has a genome structure similar to the one reported for other vitiviruses, with five open reading frames (ORFs) coding for the conserved domains described for members of that genus. Phylogenetic analysis of the complete genome sequence confirmed its affiliation to the genus Vitivirus, with the closest described viruses being grapevine virus E (GVE) and Agave tequilana leaf virus (ATLV). However, the virus we report is distinct and shares only 51% amino acid sequence identity with GVE in the replicase polyprotein and 66.8% amino acid sequence identity with ATLV in the coat protein. This is well below the threshold determined by the ICTV for species demarcation, and we propose that this virus represents a new species. It is provisionally named “grapevine virus G”.
Publisher URL: https://link.springer.com/article/10.1007/s00705-017-3581-0
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