Abstract
A new virus, tentatively named "kudzu virus D" (KuVD) was discovered in kudzu (Pueraria montana var.lobata) in South Korea. Its complete genome comprises 7,922 nucleotides, excluding the poly(A) tail, and contains five open reading frames (ORFs) encoding, from 5' to 3', a replicase (ORF1), three triple gene block proteins TGB1-3 (ORF2-ORF4), and a coat protein (ORF5). This genome organization is typical of members of the subfamily Quinvirinae of the family Betaflexiviridae. Pairwise alignment analysis revealed that the nucleotide sequences of the replicase and coat protein of KuVD were 12.13-54.46% and 24.03-50.67% identical, respectively, to those of other members of the family Betaflexiviridae. These values are far below the current species ICTV demarcation threshold. Consequently, KuVD should be considered a member of a new species in the subfamily Quinvirinae.
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