Microsatellites reveal a strong subdivision of genetic structure in Chinese populations of the mite Tetranychus urticae Koch (Acari: Tetranychidae).
Microsatellites reveal a strong subdivision of genetic structure in Chinese populations of the mite Tetranychus urticae Koch (Acari: Tetranychidae).
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微卫星揭示了中国二斑叶螨（蜱螨亚科：Tetranychidae）种群遗传结构的强烈细分
DOI：
10.1186/1471-2156-13-8
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发表时间：
2012-02-21
期刊：
影响因子：
2.9
通讯作者：
Hong XY
中科院分区：
文献类型：
--
作者：
Sun JT;Lian C;Navajas M;Hong XY
两种颜色的双斑蜘蛛螨（叶螨）在中国共存：一种红色（胭脂红）形式，被认为是本地的，一种绿色形式被认为是入侵的。该生物在中国的群体遗传多样性和群体遗传结构尚不清楚，是否构成独特种存在争议。为了解决这些问题，我们利用8个微卫星位点对中国18个红色种群和7个绿色种群的1055个个体进行了基因分型。结果共鉴定出109个等位基因。结果表明，25个居群间遗传分化极显著（globalFST= 0.506, globalFST{ENA}= 0.473），居群间遗传多样性较低。此外，红色型螨的遗传多样性高于绿色型螨。变异统计（ARandHE）与地理坐标（纬度和经度）之间的Pearson相关性表明，红色品种的遗传多样性与纬度相关。采用贝叶斯聚类方法，将中国螨种群划分为5个支系，与地理分布较为一致。结论蜘蛛螨具有较低的遗传多样性，种群间的基因流动受限，且具有明显的距离隔离效应。这些因素反过来又促成了遗传结构的强烈细分。此外，种群遗传结构结果也不支持两种蜘蛛螨分离为两种。两种螨的形态差异可能是表观遗传效应的结果。
BackgroundTwo colour forms of the two-spotted spider mite (Tetranychus urticaeKoch) coexist in China: a red (carmine) form, which is considered to be native and a green form which is considered to be invasive. The population genetic diversity and population genetic structure of this organism were unclear in China, and there is a controversy over whether they constitute distinct species. To address these issues, we genotyped a total of 1,055 individuals from 18 red populations and 7 green populations in China using eight microsatellite loci.ResultsWe identified 109 alleles. We found a highly significant genetic differentiation among the 25 populations (globalFST= 0.506, globalFST{ENA}= 0.473) and a low genetic diversity in each population. In addition, genetic diversity of the red form mites was found to be higher than the green form. Pearson correlations between statistics of variation (ARandHE) and geographic coordinates (latitude and longitude) showed that the genetic diversity of the red form was correlated with latitude. Using Bayesian clustering, we divided the Chinese mite populations into five clades which were well congruent with their geographic distributions.ConclusionsSpider mites possess low levels of genetic diversity, limit gene flow between populations and significant and IBD (isolation by distance) effect. These factors in turn contribute to the strong subdivision of genetic structure. In addition, population genetic structure results don't support the separation of the two forms of spider mite into two species. The morphological differences between the two forms of mites may be a result of epigenetic effects.
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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
影响因子：
2.3
作者：
Li, Ting;Chen, Xiao-Lin;Hong, Xiao-Yue
通讯作者：
Hong, Xiao-Yue
影响因子：
2.6
作者：
Excoffier, Laurent;Laval, Guillaume;Schneider, Stefan
通讯作者：
Schneider, Stefan
影响因子：
2.2
作者：
Carbonnelle, Sabine;Hance, Thierry;Navajas, Maria
通讯作者：
Navajas, Maria
影响因子：
1.3
作者：
HINOMOTO, N;TAKAFUJI, A
通讯作者：
TAKAFUJI, A
影响因子：
4.9
作者：
Keyghobadi, N;Roland, J;Strobeck, C
通讯作者：
Strobeck, C