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<p>This study presents the first virome analysis in <i>Colletotrichum</i> species associated with <i>Dioscorea cayennensis-rotundata</i> (yam) and <i>Etlingera elatior</i> in Brazil. We report on the detection and genomic characterization of four novel positive-sense RNA mycoviruses. Notably, this study includes the first report of a botourmiavirus tentatively named Colletotrichum tropicale botourmia-like virus infecting <i>Colletotrichum tropicale</i>, a phytopathogenic fungus isolated from yam. We also describe a new fusarivirus, tentatively named Colletotrichum queenslandicum fusarivirus 1, identified in <i>C. plurivorum</i>, <i>C. queenslandicum</i>, and <i>C. tropicale</i>, and two novel mitoviruses, for which we propose the name Colletotrichum-associated mitovirus 1 and Colletotrichum plurivorum mitovirus 1 found in <i>C. queenslandicum</i>, <i>C. siamenses</i>, <i>C. tropicale</i>, and <i>C. plurivorum</i>, respectively. Viral genome sequences were assembled from high-throughput sequencing data and confirmed by Sanger sequencing. Altogether, these results provide new insights into the virosphere of <i>Colletotrichum</i>, expanding the known diversity of mycoviruses in tropical agroecosystems, and contribute to the understanding of mycovirus occurrence in phytopathogenic fungi in Brazil.</p>

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Novel RNA viruses associated with Colletotrichum spp. in Brazil

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月4日

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  • José Ailton Cruz Macedo dos Santos,
  • Dayla Geovana Pereira Bezerra,
  • Ana Gabriele Gurgel Amaral,
  • Paolo Margaria,
  • Marcos Paz Saraiva Câmara,
  • Rosana Blawid

摘要

This study presents the first virome analysis in Colletotrichum species associated with Dioscorea cayennensis-rotundata (yam) and Etlingera elatior in Brazil. We report on the detection and genomic characterization of four novel positive-sense RNA mycoviruses. Notably, this study includes the first report of a botourmiavirus tentatively named Colletotrichum tropicale botourmia-like virus infecting Colletotrichum tropicale, a phytopathogenic fungus isolated from yam. We also describe a new fusarivirus, tentatively named Colletotrichum queenslandicum fusarivirus 1, identified in C. plurivorum, C. queenslandicum, and C. tropicale, and two novel mitoviruses, for which we propose the name Colletotrichum-associated mitovirus 1 and Colletotrichum plurivorum mitovirus 1 found in C. queenslandicum, C. siamenses, C. tropicale, and C. plurivorum, respectively. Viral genome sequences were assembled from high-throughput sequencing data and confirmed by Sanger sequencing. Altogether, these results provide new insights into the virosphere of Colletotrichum, expanding the known diversity of mycoviruses in tropical agroecosystems, and contribute to the understanding of mycovirus occurrence in phytopathogenic fungi in Brazil.