Genomic and phylogenetic evidence that Maize rough dwarf and Rice black-streaked dwarf fijiviruses should be classified as different geographic strains of a single species
文献类型： 外文期刊
作者： Xie, L. 1 ; Lv, M. -F. 1 ; Yang, J. 1 ; Chen, J. -P. 1 ; Zhang, H. -M. 1 ;
作者机构： 1.Zhejiang Acad Agr, Inst Virol & Biotechnol, Zhejiang Prov Key Lab Plant Virol,State Key Lab B, Minist Agr,Key Lab Plant Protect & Biotechnol, Hangzhou 310021, Zhejiang, Peoples R China
关键词： Maize rough dwarf virus (MRDV);Rice black-streaked dwarf virus (RBSDV);Fijivirus;Cereal black-streaked dwarf fijivirus (CBSDV)
期刊名称：ACTA VIROLOGICA （ 影响因子：1.162； 五年影响因子：1.255 ）
ISSN： 0001-723X
年卷期： 2017 年 61 卷 4 期
页码：
收录情况： SCI
摘要： Maize rough dwarf disease (MRDD) has long been known as one of the most devastating viral diseases of maize worldwide and is caused by single or complex infection by four fijiviruses: Maize rough dwarf virus (MRDV) in Europe and the Middle East, Mal de Rio Cuarto virus (MRCV) in South America, rice black-streaked dwarf virus (RBSDV), and Southern rice black-streaked dwarf virus (SRBSDV or Rice black-streaked dwarf virus 2, RBSDV-2) in East Asia. These are currently classified as four distinct species in the genus Fijivirus, family Reoviridae, but their taxonomic status has been questioned. To help resolve this, the nucleotide sequences of the ten genomic segments of an Italian isolate of MRDV have been determined, providing the first complete genomic sequence of this virus. Its genome has 29144 nucleotides and is similar in organization to those of RBSDV, SRBSDV, and MRCV. The 13 ORFs always share highest identities (81.3-97.2%) with the corresponding ORFs of RBSDV and phylogenetic analyses of the different genome segments and ORFs all confirm that MRDV clusters most closely with RBSDV and that MRCV and SRBSDV are slightly more distantly related. The results suggest that MRDV and RBSDV should be classified as different geographic strains of the same virus species and we suggest the name cereal black-streaked dwarf fijivirus (CBSDV) for consideration.
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