A novel mycovirus identified from the rice false smut fungus Ustilaginoidea virens

作者：Zhu, Hong Jian; Chen, Dan; Zhong, Jie^*; Zhang, Shuai Yang; Gao, Bi Da

来源：Virus Genes, 2015, 51(1): 159-162.

DOI：10.1007/s11262-015-1212-y

• Mycovirus
• Ustilaginoidea virens
• Unclassified family

The complete sequence of a novel mycovirus infecting Ustilaginoidea virens, the causal agent of false smut of rice, is reported here and designated as Ustilaginoidea virens unassigned RNA virus HNND-1 (UvURV-HNND-1). This virus has an undivided dsRNA genome of 2903 nt in length and contains two non-overlapping open reading frames (ORF1 and 2), with the small ORF1 encoding a protein of unknown function that showed sequence similarity to the comparable protein in virus Alternaria longipes dsRNA virus 1(AlRV1) and a larger ORF2 encoded the protein showing identities to the RNA-dependent RNA polymerases of AlRV1 and some other unassigned dsRNA viruses. Phylogenetic analysis showed that UvURV-HNND-1 is more closely related to unclassified viruses such as AlRV1 and distinct from distantly related members of the family Partitiviridae. Here, we propose in accordance with previous reports that UvURV-HNND-1 might belong to a new mycovirus genus together with AlRV1 and other similar viruses.

• 出版日期2015-8
• 单位湖南农业大学