A novel mycovirus was identified infecting the phytopathogenic fungus Microdochium albescens. The characterized dsRNA segment, corresponding to the replicative intermediate of the mitovirus genome, is 2,562 base pairs (bp) in length, with an A+U content of 62.3%. A single open reading frame (ORF) was identified, encoding a putative RNA-dependent RNA polymerase (RdRp) of 706 amino acids. Phylogenetic analysis showed that this virus should be classified as a member of a new species in the genus Mitovirus, family Mitoviridae, for which we propose the name "Mitovirus gaucho". This is the first report of a mycovirus infecting the phytopathogenic fungus M. albescens, the causative agent of leaf scald on rice in Brazil.

一种新型真菌病毒被发现感染植物病原真菌Microdochium albescens。表征的 dsRNA 片段对应于有丝分裂病毒基因组的复制中间体，长度为 2,562 个碱基对 (bp)，A+U 含量为 62.3%。确定了一个开放阅读框 (ORF)，编码 706 个氨基酸的推定的 RNA 依赖性 RNA 聚合酶 (RdRp)。系统发育分析表明，该病毒应归类为有丝分裂病毒属的一个新种，即有丝分裂病毒科，我们建议将其命名为“高乔有丝分裂病毒”。这是真菌病毒感染植物病原真菌M. albescens的第一份报告，巴西水稻叶烫病的病原体。