文献类型： 外文期刊
作者： Xie, Xiansheng 1 ; Chen, Wei 3 ; Fu, Qiang 1 ; Zhang, Penghui 1 ; An, Tianci 1 ; Cui, Aimin 2 ; An, Derong 1 ;
作者机构： 1.Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Yangling, Shaanxi, Peoples R China
2.Shanxi Acad Agr Sci, Wheat Res Inst, Linfen, Shanxi, Peoples R China
3.Shanxi Normal Univ, Coll Life Sci, Linfen, Shanxi, Peoples R China
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2016 年 11 卷 3 期
页码：
收录情况： SCI
摘要： Background Sugarcane mosaic virus (SCMV) is responsible for large-scale economic losses in the global production of sugarcane, maize, sorghum, and some other graminaceous species. To understand the evolutionary mechanism of SCMV populations, this virus was studied in Shanxi, China. A total of 86 maize leaf samples (41 samples in 2012 and 45 samples in 2013) were collected from 4 regions of Shanxi. Results Double-antibody sandwich (DAS)-ELISA and RT-PCR showed 59 samples (30 samples in 2012 and 29 samples in 2013) to be positive for SCMV, from which 10 new isolates of SCMV were isolated and sequenced. The complete genomes of these isolates are 9610 nt long, including the 50 and 30 non-coding regions, and encode a 3063-amino acid polyprotein. Phylogenetic analyses revealed that 24 SCMV isolates could be divided on the basis of the whole genome into 2 divergent evolutionary groups, which were associated with the host species. Among the populations, 15 potential recombination events were identified. The selection pressure on the genes of these SCMV isolates was also calculated. The results confirmed that all the genes were under negative selection. Conclusions Negative selection and recombination appear to be important evolutionary factors shaping the genetic structure of these SCMV isolates. SCMV is distributed widely in China and exists as numerous strains with distinct genetic diversity. Our findings will provide a foundation for evaluating the epidemiological characteristics of SCMV in China and will be useful in designing long-term, sustainable management strategies for SCMV.
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