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<p>In this study, a novel double-stranded RNA (dsRNA) mycovirus, tentatively designated Fusarium solani partitivirus 4 (FsPV4), was isolated from the <i>Fusarium solani</i> strain GF7, a phytopathogenic fungus responsible for tobacco root rot. The genome of FsPV4 consists of two dsRNA segments, referred to as dsRNA1 (2312&#xa0;bp in length) and dsRNA2 (2213&#xa0;bp in length). The dsRNA 1 and dsRNA 2 were predicted to encode an RNA-dependent RNA polymerase (RdRp) and a coat protein (CP), respectively. Sequence analysis revealed that the RdRp of FsPV4 showed significant sequence similarity to the RdRps of partitiviruses, with Aplosporella javeedii partitivirus 1 being the best match (identity: 60.76%). Phylogenetic analysis of the RdRp showed that FsPV4 clustered robustly within the genus <i>Betapartitivirus</i> of the family <i>Partitiviridae</i>. This represents the first report of a betapartitivirus infecting <i>F. solani</i>, providing a potential candidate for the biological control of <i>F. solani</i>-mediated plant diseases.</p>

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Molecular characterization of a novel partitivirus isolated from Fusarium solani, the causal agent of tobacco root rot

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Xiao Wu,
  • Ying Wang,
  • Rui Guo,
  • Ya Rong Wang,
  • Si Jun Li,
  • Xiang Ping Zhou,
  • Jie Zhong,
  • Yan Song Xiao,
  • Tian Bo Liu

摘要

In this study, a novel double-stranded RNA (dsRNA) mycovirus, tentatively designated Fusarium solani partitivirus 4 (FsPV4), was isolated from the Fusarium solani strain GF7, a phytopathogenic fungus responsible for tobacco root rot. The genome of FsPV4 consists of two dsRNA segments, referred to as dsRNA1 (2312 bp in length) and dsRNA2 (2213 bp in length). The dsRNA 1 and dsRNA 2 were predicted to encode an RNA-dependent RNA polymerase (RdRp) and a coat protein (CP), respectively. Sequence analysis revealed that the RdRp of FsPV4 showed significant sequence similarity to the RdRps of partitiviruses, with Aplosporella javeedii partitivirus 1 being the best match (identity: 60.76%). Phylogenetic analysis of the RdRp showed that FsPV4 clustered robustly within the genus Betapartitivirus of the family Partitiviridae. This represents the first report of a betapartitivirus infecting F. solani, providing a potential candidate for the biological control of F. solani-mediated plant diseases.