Invasive Chloroplast Population Genetics of Mikania micrantha in China: No Local Adaptation and Negative Correlation between Diversity and Geographic Distance.
Invasive Chloroplast Population Genetics of Mikania micrantha in China: No Local Adaptation and Negative Correlation between Diversity and Geographic Distance.
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中国薇甘菊入侵叶绿体种群遗传学：无局部适应且多样性与地理距离呈负相关
DOI：
10.3389/fpls.2016.01426
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发表时间：
2016
影响因子：
5.6
通讯作者：
Su Y
中科院分区：
文献类型：
--
作者：
Wang T;Wang Z;Chen G;Wang C;Su Y
关于入侵物种如何能够迅速在新的栖息地定居的两个基本问题已经出现。其中一个问题是，入侵种群的遗传多样性与它们距引种地的地理距离之间是否存在负相关。另一个问题是，叶绿体基因组的选择是否是适应新土壤环境的重要驱动因素。在这里，我们在对有害的入侵杂草薇甘菊的研究中解决了这些问题。薇甘菊自1884年引入香港以来，迅速扩展到中国南部。利用7个叶绿体简单序列重复序列(CpSSR)对28个薇甘菊居群进行了遗传分析，共产生39个基因座。测量了这些种群的土壤组成，包括镁的丰度。结果表明，薇甘菊具有较高的cpSSR变异和居群间分化。多个多样性指数被量化，没有一个与距引种地的距离显著相关。没有发现“距离隔离”的证据，也没有发现显著的空间结构、瓶颈和链接不平衡。我们也无法确定叶绿体基因组上显示分化模式的基因座，这些模式表明适应土壤属性的进化。土壤镁只具有全基因组效应，而不是一个选择因子，这突出了镁与成功入侵之间的联系。本研究描述了薇甘菊叶绿体基因组在其最近入侵中国南部过程中所起的作用。
Two fundamental questions on how invasive species are able to rapidly colonize novel habitat have emerged. One asks whether a negative correlation exists between the genetic diversity of invasive populations and their geographic distance from the origin of introduction. The other is whether selection on the chloroplast genome is important driver of adaptation to novel soil environments. Here, we addressed these questions in a study of the noxious invasive weed, Mikania micrantha, which has rapidly expanded in to southern China after being introduced to Hong Kong in 1884. Seven chloroplast simple sequence repeats (cpSSRs) were used to investigate population genetics in 28 populations of M. micrantha, which produced 39 loci. The soil compositions for these populations, including Mg abundance, were measured. The results showed that M. micrantha possessed relatively high cpSSR variation and differentiation among populations. Multiple diversity indices were quantified, and none was significantly correlated with distance from the origin of introduction. No evidence for “isolation by distance,” significant spatial structure, bottlenecks, nor linkage disequilibrium was detected. We also were unable to identify loci on the chloroplast genome that exhibited patterns of differentiation that would suggest adaptive evolution in response to soil attributes. Soil Mg had only a genome-wide effect instead of being a selective factor, which highlighted the association between Mg and the successful invasion. This study characterizes the role of the chloroplast genome of M. micrantha during its recent invasion of southern China.
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DOI：
10.1073/pnas.92.17.7759
发表时间：
1995-08-15
影响因子：
11.1
作者：
POWELL, W;MORGANTE, M;RAFALSKI, JA
通讯作者：
RAFALSKI, JA
影响因子：
5.8
作者：
Bradbury, Peter J.;Zhang, Zhiwu;Buckler, Edward S.
通讯作者：
Buckler, Edward S.
影响因子：
1.4
作者：
Austerlitz, F;JungMuller, B;Gouyon, PH
通讯作者：
Gouyon, PH
影响因子：
4.9
作者：
Dlugosch, K. M.;Parker, I. M.
通讯作者：
Parker, I. M.
影响因子：
56.9
作者：
Hancock, Angela M.;Brachi, Benjamin;Bergelson, Joy
通讯作者：
Bergelson, Joy