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<p>Mycoviruses are ubiquitous in fungi, and some of these viruses induce hypovirulence, making them potential biocontrol agents. However, the effect of host genetic background at the pathogen population level on the performance of mycoviruses has not been fully investigated. Here, five diverse species of mycoviruses in <i>Botrytis cinerea</i> were used as a model to investigate the effect of population variation on mycovirus-induced phenotypes. The five mycoviruses were fully sequenced, including two hypoviruses (dsRNA1 and dsRNA2), one victorivirus (dsRNA3), and one partitivirus (dsRNA7 and dsRNA8), while one virus (dsRNA4, dsRNA5, and dsRNA6) remained unclassified. These viruses were readily transmitted to three <i>B</i>. <i>cinerea</i> strains, resulting in several derivative strains infected by different combinations of the five viruses. Notably, infection by some of these five viruses generally increased sporulation. However, the symptoms induced by the viruses varied, ranging from no significant effects to reduced virulence among different <i>B</i>. <i>cinerea</i> strains with the same viral profile. Therefore, we propose that the <i>B</i>. <i>cinerea</i> population can be broadly categorized into sensitive and insensitive groups regarding viral infection. These findings suggest that variation within the <i>B</i>. <i>cinerea</i> population may affect mycovirus-mediated phenotypic changes in their hosts. The presence of the insensitive group within the fungal population could also complicate the application of mycoviruses for fungal disease control.</p>

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Co-infection of multiple mycoviruses in a Botrytis cinerea isolate and their strain-specific biological impacts

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月16日

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  • Guoyuan He,
  • Ziliang Zhou,
  • Long Yang,
  • Jing Zhang,
  • Lin Yu,
  • Fangmin Hao,
  • Amir Sharon,
  • Weidong Chen,
  • Daohong Jiang,
  • Guoqing Li,
  • Mingde Wu

摘要

Mycoviruses are ubiquitous in fungi, and some of these viruses induce hypovirulence, making them potential biocontrol agents. However, the effect of host genetic background at the pathogen population level on the performance of mycoviruses has not been fully investigated. Here, five diverse species of mycoviruses in Botrytis cinerea were used as a model to investigate the effect of population variation on mycovirus-induced phenotypes. The five mycoviruses were fully sequenced, including two hypoviruses (dsRNA1 and dsRNA2), one victorivirus (dsRNA3), and one partitivirus (dsRNA7 and dsRNA8), while one virus (dsRNA4, dsRNA5, and dsRNA6) remained unclassified. These viruses were readily transmitted to three B. cinerea strains, resulting in several derivative strains infected by different combinations of the five viruses. Notably, infection by some of these five viruses generally increased sporulation. However, the symptoms induced by the viruses varied, ranging from no significant effects to reduced virulence among different B. cinerea strains with the same viral profile. Therefore, we propose that the B. cinerea population can be broadly categorized into sensitive and insensitive groups regarding viral infection. These findings suggest that variation within the B. cinerea population may affect mycovirus-mediated phenotypic changes in their hosts. The presence of the insensitive group within the fungal population could also complicate the application of mycoviruses for fungal disease control.