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<p>A novel alphapartitivirus, tentatively named "Ceratobasidium alphapartitivirus 1" (CeAPV1), was identified in the phytopathogenic fungus <i>Ceratobasidium</i> anastomosis group (AG)-A strain SR-LN-10, which was isolated from diseased strawberry roots exhibiting typical symptom of root rot. The full genome of CeAPV1 consists of two linear double-stranded RNA (dsRNA) segments: dsRNA1 and dsRNA2. The larger segment, dsRNA1 (1891 bp), contains an open reading frame (ORF) predicted to encode a 578-amino-acid (aa) RNA-dependent RNA polymerase (RdRp). The smaller segment, dsRNA2 (1878 bp), contains an ORF encoding a 546-aa coat protein (CP). BLASTp analysis showed that the RdRp encoded by CeAPV1 had the highest sequence similarity (74.78% identity) to the RdRp of Leucocoprinus alphapartitivirus 1 (LeAPV1). The CP encoded by CeAPV1 showed the highest sequence similarity (44.24% identity) to the CP of Bondarzewia berkeleyi partitivirus 1 (BbPV1). Phylogenetic analysis revealed that CeAPV1 clustered together with mycoviruses belonging to the genus <i>Alphapartitivirus</i> within the family <i>Partitiviridae</i>. Taken together, this indicated that CeAPV1 is a novel alphapartitivirus. This is the first report of a full-genome sequence of a novel alphapartitivirus infecting AG-A.</p>

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Characterization of a novel alphapartitivirus associated with Ceratobasidium sp. AG-A strain SR-LN-10, a causal agent of strawberry root rot

  • 期刊论文

  • 发表日期：

    2025年11月22日

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  • Xinyi Zhang,
  • Chunyan Wu,
  • Ju Chen,
  • Can Zhao,
  • Xuehong Wu

摘要

A novel alphapartitivirus, tentatively named "Ceratobasidium alphapartitivirus 1" (CeAPV1), was identified in the phytopathogenic fungus Ceratobasidium anastomosis group (AG)-A strain SR-LN-10, which was isolated from diseased strawberry roots exhibiting typical symptom of root rot. The full genome of CeAPV1 consists of two linear double-stranded RNA (dsRNA) segments: dsRNA1 and dsRNA2. The larger segment, dsRNA1 (1891 bp), contains an open reading frame (ORF) predicted to encode a 578-amino-acid (aa) RNA-dependent RNA polymerase (RdRp). The smaller segment, dsRNA2 (1878 bp), contains an ORF encoding a 546-aa coat protein (CP). BLASTp analysis showed that the RdRp encoded by CeAPV1 had the highest sequence similarity (74.78% identity) to the RdRp of Leucocoprinus alphapartitivirus 1 (LeAPV1). The CP encoded by CeAPV1 showed the highest sequence similarity (44.24% identity) to the CP of Bondarzewia berkeleyi partitivirus 1 (BbPV1). Phylogenetic analysis revealed that CeAPV1 clustered together with mycoviruses belonging to the genus Alphapartitivirus within the family Partitiviridae. Taken together, this indicated that CeAPV1 is a novel alphapartitivirus. This is the first report of a full-genome sequence of a novel alphapartitivirus infecting AG-A.