文献类型： 外文期刊

作者： Zheng, Yun ¹ ; Yin, Shuangshuang ¹ ; Zhao, Yinxiao ¹ ; Li, Siyu ¹ ; Lu, Zhou ¹ ; Li, Zikuo ¹ ; Deng, Qingchao ¹ ; Li, Zhanbiao ² ; Zhang, Songbai ¹ ; Fang, Shouguo ¹ ;

作者机构： 1.Yangtze Univ, Hubei Engn Res Ctr Pest Forewarning & Management, MARA Key Lab Sustainable Crop Prod Middle Reaches, Jingzhou 434025, Peoples R China

2.Guangxi Acad Agr Sci, MARA Key Lab Green Prevent & Control Fruits & Vege, Guangxi Key Lab Biol Crop Dis & Insect Pests, Nanning 530007, Peoples R China

关键词： Setosphaeria turcica chrysovirus 1; Chrysovirus; Setosphaeria turcica f; sp; sorghi; Genetic diversity

期刊名称：VIRUS RESEARCH （ 影响因子：5.0； 五年影响因子：4.0 ）

ISSN： 0168-1702

年卷期： 2023 年 325 卷

页码：

收录情况： SCI

摘要： A new double-stranded RNA (dsRNA) virus has been identified in the filamentous fungus Setosphaeria turcica f.sp. sorghi, whose genome consists of four segments (dsRNA1-4). Each dsRNA carries single open reading frame (ORF) flanked by 5 ' and 3 ' untranslated regions (UTRs) containing strictly conserved termini. The putative protein encoded by dsRNA1 showed 80.50% identity to the RNA-dependent RNA polymerase (RdRp) of the most closely related virus, Alternaria alternata chrysovirus 1 (AaCV1), belonging to the Chrysoviridae. dsRNA2 encodes the putative coat protein, while dsRNA3 and dsRNA4 respectively encode the hypothetical proteins of unknown functions. Phylogenetic analysis based on the RdRp protein indicated the virus clustered with members of the genus Betachrysovirus in the family Chrysoviridae. Based on the dsRNA profile, amino acid sequence comparisons, and phylogenetic analyses, the mycovirus is thought to be a new member of the family Chrysoviridae and designated as Setosphaeria turcica chrysovirus 1 (StCV1). Moreover, obvious differences were observed in the colony, mycelial and spore morphology between StCV1-infected and virus-cured strains of S. turcica f.sp. sorghi. StCV1 infection strongly reduced colony growth rate, spore production ability and virulence on host fungus. To our knowledge, this is the first report about mycovirus infecting S. turcica f.sp. sorghi and also the first chrysovirus infecting S. turcica.