Li Xiangdong, Zhu Tiansheng, Yin Xiao, Zhang Chengling, Chen Jia, Tian Yanping, Liu Jinliang
Laboratory of Plant Virology, Department of Plant Pathology, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong, 271018, China.
College of Plant Science and Technology, Tarimu University, Alar, 843300, China.
Virol J. 2017 Aug 29;14(1):165. doi: 10.1186/s12985-017-0832-3.
Turnip mosaic virus (TuMV) is one of the most widespread and economically important virus infecting both crop and ornamental species of the family Brassicaceae. TuMV isolates can be classified to five phylogenetic lineages, basal-B, basal-BR, Asian-BR, world-B and Orchis.
To understand the genetic structure of TuMV from radish in China, the 3'-terminal genome of 90 TuMV isolates were determined and analyzed with other available Chinese isolates. The results showed that the Chinese TuMV isolates from radish formed three groups: Asian-BR, basal-BR and world-B. More than half of these isolates (52.54%) were clustered to basal-BR group, and could be further divided into three sub-groups. The TuMV basal-BR isolates in the sub-groups I and II were genetically homologous with Japanese ones, while those in sub-group III formed a distinct lineage. Sub-populations of TuMV basal-BR II and III were new emergent and in a state of expansion. The Chinese TuMV radish populations were under negative selection. Gene flow between TuMV populations from Tai'an, Weifang and Changchun was frequent.
The genetic structure of Turnip mosaic virus population reveals the rapid expansion of a new emergent lineage in China.
芜菁花叶病毒（TuMV）是感染十字花科作物和观赏植物的分布最广泛且具有重要经济意义的病毒之一。TuMV分离株可分为五个系统发育谱系，即基部-B、基部-BR、亚洲-BR、世界-B和兰花谱系。
为了解中国萝卜上TuMV的遗传结构，测定了90个TuMV分离株的3'末端基因组，并与其他可用的中国分离株进行了分析。结果表明，中国萝卜上的TuMV分离株形成了三个组：亚洲-BR、基部-BR和世界-B。这些分离株中超过一半（52.XX%）聚集在基部-BR组，并且可以进一步分为三个亚组。亚组I和II中的TuMV基部-BR分离株与日本的分离株在遗传上同源，而亚组III中的分离株形成了一个独特的谱系。TuMV基部-BR II和III的亚群体是新出现的且处于扩张状态。中国TuMV萝卜群体处于负选择状态。泰安、潍坊和长春的TuMV群体之间的基因流动频繁。
芜菁花叶病毒群体的遗传结构揭示了中国一个新出现的谱系的快速扩张。
