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. 2025 Mar 27;170(5):90.
doi: 10.1007/s00705-025-06272-y.

Complete genome sequence of a novel mitovirus identified in the phytopathogenic fungus Puccinia triticina

Yanhui Zhang  1 , Nuoheng Wang  1 , Jinyang Li  1 , Bingtao Chen  1 , Zhensheng Kang  2 , Pengyu Song  3 , Wenming Zheng  4
Affiliations

Complete genome sequence of a novel mitovirus identified in the phytopathogenic fungus Puccinia triticina

Yanhui Zhang et al. Arch Virol. .

Abstract

Wheat leaf rust is caused by the obligate biotrophic fungus Puccinia triticina f. sp. tritici, which seriously affects wheat production. In this study, a novel mitovirus was identified in Puccinia triticina strain HN-1 and designated as "Puccinia triticina mitovirus 1" (PtMV1). The genome of PtMV1 consists of a single RNA molecule with a length of 2,380 nt and an A + U content of 54.7% that contains a single open reading frame (ORF). The ORF is predicted to encode a putative RNA-dependent RNA polymerase (RdRp) of 653 amino acids with a molecular mass of 74.77 kDa, containing six conserved motifs. The RdRp amino acid sequence of PtMV1 has a high degree of sequence similarity to the RdRps of unuamitoviruses. Phylogenetic analysis indicated that PtMV1 is a new member of the genus Unuamitovirus within the family Mitoviridae. To our knowledge, this is the first report of a fungal virus in Puccinia triticina.

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Conflict of interest statement

Declarations. Ethical approval: This article does not contain any studies with animals or human participants performed by any of the authors. Conflict of interest: All authors declare that they have no conflict of interest regarding this study.

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