From speciation to introgressive hybridization: the phylogeographic structure of an island subspecies of termite, Reticulitermes lucifugus corsicus.
From speciation to introgressive hybridization: the phylogeographic structure of an island subspecies of termite, Reticulitermes lucifugus corsicus.
复制标题
从物种形成到内在杂交：白蚁的岛屿亚种的植物地理结构，网状透明杆菌。
DOI：
10.1186/1471-2148-8-38
复制
发表时间：
2008-02-04
影响因子：
3.4
通讯作者：
Bagnères AG
中科院分区：
文献类型：
--
作者：
Lefebvre T;Châline N;Limousin D;Dupont S;Bagnères AG
尽管近年来对欧洲网状目的分类学进行了大量的研究，但关于系统发育关系的讨论仍然较多。本研究探讨了海岛亚种Reticulitermes lucifugus corsicus从种内到种间系统发育的演变，为这一现象的研究提供了新的思路。一种基于微卫星、线粒体和核DNA序列的综合方法被用于分析从第勒尼安海周围广阔地区采集的样本，并展示了亚种如何从其起源进化到大陆海岸的最新形式。根据线粒体系统发育和分子钟计算，在更新世冰期，岛屿和大陆分类群发生了明显的变异。然而，最近，大量的迁徙，当然是人为的，影响了人口的结构。本研究提供了直接杂交和在几个杂交区域发生多次渗滤的证据。基于微卫星数据的STRUCTURE分析确定了普罗旺斯（法国）的种群与科西嘉岛和意大利半岛托斯卡纳的种群差异很大（Fst = 0.477）。这些新人口主要分布在城市地区，具有高度的异质性，特别是在协同进化的均质化似乎尚未完成的信息技术2区域内。该研究为第勒尼安地区白蚁种群间的遗传相互作用提供了一幅不同寻常的画面，并表明应更多地关注入侵和人类对欧洲白蚁近期进化的影响。
Although much research has been carried out into European Reticulitermes taxonomy in recent years, there is still much discussion about phylogenetic relationships. This study investigated the evolution from intra- to interspecific phylogeny in the island subspecies Reticulitermes lucifugus corsicus and threw new light on this phenomenon. An integrative approach based on microsatellites and mitochondrial and nuclear DNA sequences was used to analyze samples taken from a wide area around the Tyrrhenian sea and showed how the subspecies evolved from its origins to its most recent form on continental coasts. According to mitochondrial phylogeny and molecular clock calculations, island and continental taxa diverged significantly by vicariance in the Pleistocene glacial period. However, more recently, numerous migrations, certainly human-mediated, affected the structure of the populations. This study provided evidence of direct hybridization and multiple introgressions which occurred in several hybrid areas. Analysis using STRUCTURE based on microsatellite data identified a population in Provence (France) which differed considerably (Fst = 0.477) from populations on the island of Corsica and in Tuscany in the Italian peninsula. This new population, principally distributed in urban areas, is highly heterogeneous especially within the ITS2 regions where homogenization by concerted evolution does not appear to have been completed. This study provides an unusual picture of genetic interaction between termite populations in the Tyrrhenian area and suggests that more attention should be paid to the role of introgression and human impact on the recent evolution of European termites.
登录
查看更多内容
影响因子：
4.1
作者：
Allegrucci, G;Todisco, V;Sbordoni, V
通讯作者：
Sbordoni, V
影响因子：
4.1
作者：
Jenkins, Tracie M.;Jones, Susan C.;Kleinschmidt, Scott
通讯作者：
Kleinschmidt, Scott
影响因子：
2.3
作者：
Murakami, T;Ohkawara, K;Higashi, S
通讯作者：
Higashi, S
影响因子：
4.9
作者：
Hewitt, GM
通讯作者：
Hewitt, GM
影响因子：
16.8
作者：
Jiggins, CD;Mallet, J
通讯作者：
Mallet, J