Natural Resources Institute Finland, Latokartanonkaari 9, 00790, Helsinki, Finland.
Arch Virol. 2018 Apr;163(4):1113-1116. doi: 10.1007/s00705-018-3707-z. Epub 2018 Jan 11.
Root rot fungi of the genus Heterobasidion are highly destructive conifer pathogens in the northern Boreal forest region. This report describes the complete genome sequence of Heterobasidion partitivirus 20 infecting a Finnish strain of Heterobasidion annosum. The bisegmented dsRNA genome of HetPV20-an1 encodes a predicted RNA-dependent RNA polymerase of 605 amino acids (aa) and a capsid protein of 536 aa. Based on sequence similarity and phylogenetic analysis, this virus is a new member of the genus Alphapartitivirus. HetPV20-an1 shares ~65% RdRP aa sequence identity with the most similar virus strain, Rosellinia necatrix partitivirus 2, whereas the CP of HetPV20-an1 is most similar to that of rose partitivirus with ~27% overall aa sequence identity. HetPV20-an1 is only distantly related to previously known partitiviruses of Heterobasidion species and shares ~29% RdRP aa sequence identity and ~16% CP aa sequence identity with Heterobasidion partitivirus 1 from H. abietinum.
属 Heterobasidion 的根腐真菌是北方北方森林地区极具破坏性的针叶树病原菌。本报告描述了感染芬兰 Heterobasidion annosum 菌株的 Heterobasidion partitivirus 20 的完整基因组序列。HetPV20-an1 的双节段 dsRNA 基因组编码一个预测的 605 个氨基酸（aa）的 RNA 依赖性 RNA 聚合酶和 536 个 aa 的衣壳蛋白。基于序列相似性和系统发育分析，该病毒是 Alphapartitivirus 属的一个新成员。HetPV20-an1 与最相似的病毒株 Rosellinia necatrix partitivirus 2 的 RdRP aa 序列同一性约为 65%，而 HetPV20-an1 的 CP 与 rose partitivirus 的同一性最高，约为 27%的整体 aa 序列同一性。HetPV20-an1 与先前已知的 Heterobasidion 种的部分病毒仅有较远的关系，与 Heterobasidion abietinum 的 Heterobasidion partitivirus 1 的 RdRP aa 序列同一性约为 29%，CP aa 序列同一性约为 16%。
