The genetic structure of populations of Turnip mosaic virus in Kyushu and central Honshu, Japan
The genetic structure of populations of Turnip mosaic virus in Kyushu and central Honshu, Japan
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DOI：
10.1007/s10327-007-0003-2
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发表时间：
2007-06
影响因子：
1.2
通讯作者：
Y. Tomitaka;Tohru Yamashita;K. Ohshima
中科院分区：
文献类型：
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作者：
Y. Tomitaka;Tohru Yamashita;K. Ohshima
对日本九州和本州中部萝卜花叶病毒群体的遗传结构进行了评价。利用群体遗传学方法确定了分离株的宿主特异性，并比较了它们的基因序列。部分序列的系统发育分析显示，1997-2001年收集的49株本州菌株中有32株（65%）属于basal-BR群，64株九州菌株中有23株属于basal-BR群。所有这些basal-BR分离株都感染了芸苔属植物和莴苣属植物。然而，对基因组5个区域（全序列的1 / 3）重组位点位置的分析表明，这些人群中至少存在4种谱系内重组。这些分析表明，九州和本州没有这些亚群，在两个地区存在遗传上不同的基底- br群体。我们得出结论，不同的basal-BR亚群已经扩展到这些地区。
The genetic structure of the populations ofTurnip mosaic virusin Kyushu and central Honshu, Japan was assessed. The host specificity of isolates was determined, and their gene sequences compared utilizing a population genetic approach. Phylogenetic analysis of partial sequences revealed that 32 of 49 Honshu isolates (65%) collected during 1997–2001 belonged to the basal-BR group as did 23 of 64 isolates from Kyushu. All these basal-BR isolates infected bothBrassicaandRaphanusplants. However, analyses of the positions of recombination sites in five regions of the genome (one third of the full sequence) showed that at least four intra-lineage recombinants were present in these populations. These analyses showed that Kyushu and Honshu shared none of these subpopulations, and genetically distinct basal-BR populations were present in the two districts. We conclude that different basal-BR subpopulations had expanded into those districts.