Population Genetic Structure of Tetranychus urticae and its Sibling Species Tetranychus cinnabaribus (Acari: Tetranychidae) in China as Inferred From Microsatellite Data
Population Genetic Structure of Tetranychus urticae and its Sibling Species Tetranychus cinnabaribus (Acari: Tetranychidae) in China as Inferred From Microsatellite Data
复制标题
从微卫星数据推断中国二斑叶螨及其同胞种朱砂叶螨（螨类：叶螨科）种群遗传结构
DOI：
10.1603/008.102.0412
复制
发表时间：
2009-07-01
影响因子：
2.3
通讯作者：
Hong, Xiao-Yue
中科院分区：
文献类型：
--
作者：
Li, Ting;Chen, Xiao-Lin;Hong, Xiao-Yue
摘要采用微卫星标记法对中国两斑叶螨（Tetranychus urticae Koch）及其兄弟种胭脂叶螨（car胭脂叶螨）的种群结构进行了研究。两种植物具有显著的多态性，但遗传多样性普遍较低。荨麻疹恙螨与朱砂恙螨居群间的遗传分化极显著，且与居群间的地理距离显著相关（Mantel检验）。朱砂柽柳遗传多样性总体水平显著高于荨麻柽柳。但朱砂金蝇的地理分布水平均低于荨麻金蝇。不同地理居群间的平均成对FST远高于不同地理居群间的平均成对FST，表明不同地理居群间的遗传分化远高于不同地理居群间的遗传分化。对相邻和同域采集的荨麻疹和朱砂金蝇进行比较，没有发现遗传分化与地理距离有关的证据，表明这两个物种的居群之间缺乏基因流动。在系统发育分析中，荨麻疹的7个地理居群聚集在一个分支上，朱砂的6个地理居群分布在其他分支上。
ABSTRACT The population structure of the twospotted spider mite, Tetranychus urticae Koch, and its sibling species the carmine spider mite, Tetranychus cinnabarinus (Boisduval) (Acari: Tetranychidae), from China were investigated using microsatellite markers. The two species exhibited significant polymorphism but generally low genetic diversity. The genetic differentiation between populations of T. urticae and T. cinnabarinus was extreme and was significantly related to geographical distance between the populations (Mantel test). The overall level of genetic diversity of T. cinnabarinus was significantly higher than that of T. urticae. However, the various geographical levels of T. cinnabarinus were lower than those of T. urticae. The average pairwise FST between geographical populations of T. cinnabarinus was far higher than that of T. urticae, suggesting that the genetic differentiation of T. cinnabarinus was much higher than that of T. urticae. A comparison of T. urticae and T. cinnabarinus collected in adjacent and sympatric areas provided no evidence that genetic differentiation was related to geographical distances, suggesting a lack of gene flow between populations of these two species. In a phylogenetic analysis, seven geographical populations of T. urticae clustered in one branch and six geographical populations of T. cinnabarinus were distributed in other branches.