ArticleArchives of virology2022
Complete genome sequence of vallota mosaic virus detected in a narcissus bulb imported from the United States to Japan.
Article in Archives of virology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors at 1 institution in 1 country.
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Abstract
Narcissus (Narcissus albidus) imported from the United States exhibited leaf chlorosis during post-entry quarantine. We employed next-generation sequencing (NGS) on symptomatic leaf samples and detected vallota mosaic virus (ValMV), belonging to the genus Potyvirus, family Potyviridae, as the viral agent. Sanger sequencing of PCR products and rapid amplification of cDNA ends based on NGS contigs revealed that ValMV is 9,451 nucleotides (nt) in length, excluding the poly(A) tail. Nucleotide and amino acid (aa) sequences of the coat protein region had over 98% identity to previously reported ValMV isolates. In each of the 10 regions encoding mature proteins, however, the sequence identity to other potyviruses was 49.5-71.9% nt and 18.3-78.9% aa, values that are below the species demarcation thresholds for the family Potyviridae. Phylogenetic analysis revealed that our ValMV isolate is most closely related to known ValMV isolates and is grouped with other potyviruses. Taken together, our results indicate that the newly isolated ValMV belongs to a distinct species in the genus Potyvirus. This study provides the first report of the complete ValMV genome sequence and the first record of this virus in narcissus.
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