Population Genetics of the Invasive Fire Ant Solenopsis invicta (Hymenoptera: Formicidae) in the United States
Population Genetics of the Invasive Fire Ant Solenopsis invicta (Hymenoptera: Formicidae) in the United States
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美国入侵火蚁 Solenopsis invicta（膜翅目：蚁科）的群体遗传学
DOI：
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
K. Ross
中科院分区：
文献类型：
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作者：
D. Shoemaker;C. Deheer;M. Krieger;K. Ross
摘要分析入侵物种的种群遗传变异可以提供入侵历史、繁殖系统和基因流动模式的信息。本研究调查了美国进口红火蚁（Solenopsis invicta Buren，膜翅目：蚁科）两种社会形态的遗传变异，以了解每种形态的独特繁殖生物学如何在不同尺度上塑造遗传结构，辨别入侵过程的遗传足迹，并重建每种形态的起源和传播。与更有限的早期研究一致，我们的分析显示，在一夫多妻制（多蜂王）中，局部线粒体DNA （mtDNA）分化显著，而在一夫一妻制（单蜂王）社会形式中，线粒体DNA分化明显，两种形式的同域种群之间的核分化较弱。在更大的尺度上，我们没有发现mtDNA，但发现了显著的核区域分化。总体而言，种群在mtDNA基因组上与相同社会形态的其他种群最为相似。这些更高层次的结构模式与蚂蚁的长距离传播是一致的，人类介导的扩散，每一种形式的亚奠基者群体通常由相同形式的蚁后建立。贝叶斯分析表明，离声称的进入地点最远的研究种群，莫比尔，AL，与假设的创始人种群分歧最大，这与蚂蚁通过重复的次创始人事件从莫比尔向外扩散的入侵情景一致。有几条线索的证据表明，美国有可能是不可侵犯的美洲杉的二次引种。
Abstract Analyses of population genetic variation in invasive species can provide information on the history of the invasions, breeding systems, and gene flow patterns. We surveyed genetic variation in both social forms of the red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae), throughout the species’ introduced range in the United States, to learn how the unique breeding biology of each form shapes genetic structure at various scales, to discern genetic footprints of the invasion process, and to reconstruct the origin and spread of each form. Consistent with more limited earlier studies, our analyses revealed significant local mitochondrial DNA (mtDNA) differentiation in the polygyne (multiple colony queens) but not in the monogyne (single colony queen) social form as well as pronounced mtDNA differentiation coupled with weaker nuclear differentiation between sympatric populations of the two forms. At a larger scale, we found no mtDNA but significant nuclear regional differentiation. In general, populations were most similar to other populations of the same social form at their mtDNA genomes. These higher level patterns of structure are consistent with the spread of the ant by long-distance, human-mediated dispersal, with subfounder populations of each form typically established by queens of the same form. Bayesian analyses showed that study populations most distant from the claimed site of entry, Mobile, AL, have diverged most from the hypothetical founder population, consistent with an invasion scenario in which the ants spread outward from Mobile through repeated subfounder events. Several lines of evidence raise the possibility of secondary introductions of S. invicta into the United States.
影响因子：
3.3
作者：
L. Excoffier;P. Smouse;J. Quattro
通讯作者：
L. Excoffier;P. Smouse;J. Quattro
DOI：
10.1073/pnas.0507611102
发表时间：
2005-11-01
影响因子：
11.1
作者：
Ramachandran, S;Deshpande, O;Cavalli-Sforza, LL
通讯作者：
Cavalli-Sforza, LL
使用多位点基因型数据推断群体结构：连锁位点和相关等位基因频率。
影响因子：
3.3
作者：
Falush,Daniel;Stephens,Matthew;Pritchard,JonathanK
通讯作者：
Pritchard,JonathanK