Abstract
Here, we report the full-length genome sequence of a novel cogu-like virus identified in Brassica campestris L. ssp. Chinensis (B. campestris), an economically important vegetable in China. This virus, tentatively named "Brassica campestris chinensis coguvirus 1" (BCCoV1), has a bipartite genome that consists of two RNA molecules (RNA1 and RNA2). The negative-stranded (ns) RNA1 is 6757 nt in length, encoding the putative RNA-dependent RNA polymerase (RdRp), and the ambisense RNA2 is 3061 nt long, encoding the putative movement protein (MP) and nucleocapsid protein (NP). A homology search of the RdRp, MP, and NP showed that they are closely related to five other recently discovered negative-stranded RNA (nsRNA) viruses infecting plants, belonging to the new genus Coguvirus. Phylogenetic analysis of the 252-kDa RdRp confirmed the classification of this virus, showing that BCCoV1 possibly belongs to the genus Coguvirus, family Phenuiviridae, order Bunyavirales. The present study improves our understanding of the viral diversity in B. campestris and the evolution of nsRNA viruses.
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