A novel narnavirus isolated from Colletotrichum curcumae strain 780-2T

Abstract

Abstract The complete genome of a novel mycovirus, Colletotrichum curcumae narnvirus 1 (CcNV1), derived from the phytopathogenic fungus Colletotrichum curcumae strain 780-2T was sequenced and analyzed. The full sequence of CcNV1 is 3,374 bp in length and contains a single large open reading frame (ORF) encoding an RNA-dependent RNA polymerase (RdRp) of 1,087 amino acids with a molecular mass of 124.2 kDa that shares the closest similarity with that of Monilinia narnavirus H (53.02% identity). RdRp phylogeny analysis showed that CcNV1 is a new member of the genus Betanarnavirus within family Narnaviridae. This is the first report of a novel narnavirus infecting the phytopathogenic fungus C. curcumae, the causal agent of leaf blight of Curcuma wenyujin.