Abstract
Here, we describe a novel ourmia-like virus, Botryosphaeria dothidea ourmia-like virus 2 (BdOLV2), derived from the phytopathogenic fungus Botryosphaeria dothidea strain ZM180192-1 infecting maize in Henan province of China. The complete genome sequence of BdOLV2 consists of a positive-sense single-stranded RNA (+ ssRNA) segment with a length of 2,532 nucleotides (nt). The sequence contains a large open reading frame (ORF) encoding a putative RNA-dependent RNA polymerase (RdRp) consisting of 605 amino acids (aa) with a molecular mass of 68.59 kDa. This RdRp protein contains eight typical conserved motifs associated with ourmia-like viruses. BLASTp analysis revealed that the RdRp protein of BdOLV2 had the highest similarity (62.10%, 58.15%, and 55.75% identity, respectively) to a virus previously identified as "Botourmiaviridae sp.", Macrophomina phaseolina ourmia-like virus 2, and Macrophomina phaseolina ourmia-like virus 2-A. Phylogenetic analysis based on the RdRp aa sequence indicated that BdOLV2 is a new member of the genus Magoulivirus in the family Botourmiaviridae.
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This study was financially supported by the Open Fund of State Key Laboratory for Biology of Plant Diseases and Insect Pests (SKLOF202103) and China Agriculture Research System of MOF and MARA (CARS—27).
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Song, X., Cao, J., Xie, S. et al. Molecular characterization of a novel ourmia‑like virus from the phytopathogenic fungus Botryosphaeria dothidea. Arch Virol 168, 106 (2023). https://doi.org/10.1007/s00705-023-05739-0
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DOI: https://doi.org/10.1007/s00705-023-05739-0