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首页> 美国卫生研究院文献>Evolutionary Applications >Population genomics and phylogeography of the boll weevil Anthonomus grandis Boheman (Coleoptera: Curculionidae) in the United States northern Mexico and Argentina
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Population genomics and phylogeography of the boll weevil Anthonomus grandis Boheman (Coleoptera: Curculionidae) in the United States northern Mexico and Argentina

机译：人口基因组学和博尔维尔州的播种术玉泉群岛博客（植物共和国：Curculionidae）在美国墨西哥北部和阿根廷

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摘要

The boll weevil, Anthonomus grandis Boheman (Coleoptera: Curculionidae), is an important pest of commercial cotton across the Americas. In the United States, eradication of this species is complicated by re‐infestations of areas where eradication has been previously successful and by the existence of morphologically similar variants that can confound identification efforts. To date, no study has applied a high‐throughput sequencing approach to better understand the population genetic structure of the boll weevil. Furthermore, only a single study has investigated genetic relationships between populations in North and South America. We used double digest restriction site‐associated DNA sequencing (ddRADseq) to resolve the population genomic structure of the boll weevil in the southern United States, northern Mexico, and Argentina. Additionally, we assembled the first complete mitochondrial genome for this species and generated a preliminary whole genome assembly, both of which were used to improve the identification of informative loci. Downstream analyses revealed two main lineages—one consisting of populations found geographically west of the Sierra Madre Occidental mountain range and the second consisting of populations found to the east—were revealed, and both were sub‐structured. Population geographic structure was consistent with the isolation by distance model, indicating that geogrpahic distance is likely a primary mechanism driving divergence in this species. Boll weevil populations from Argentina were found to be more closely related to the eastern lineage, suggesting a recent colonization of South America by the eastern lineage, but additional sampling across Mexico, Central America and South America is needed to further clarify their origin. Finally, we uncovered an instance of population turnover or replacement, highlighting the temporal instability of population structure.
机译：博尔万维尔，山脉甲普沃尔岛（殖民植物：Curculionidae），是在美洲的商业棉花的重要害虫。在美国，消除这种物种的重复侵犯了根除以前取得了成功的地区，并且通过能够混淆识别努力的形态类似的变体。迄今为止，否则没有研究应用了高通量测序方法以更好地理解棉铃象鼻虫的群体遗传结构。此外，只有一项研究已经研究了北美和南美人口之间的遗传关系。我们使用双重消化限制性位点相关的DNA测序（DDRADSeq）来解决美国南部，墨西哥北部和阿根廷的山林象鼻虫的人口基因组结构。另外，我们为该物种组装了第一个完整的线粒体基因组并产生了初步全基因组组件，两者都用于改善信息型位点的识别。下游分析揭示了两个主要谱系 - 一个由塞拉斯拉马德尔西部地区以西的人口组成，第二次由揭露东方的群体组成，两者都是子结构化的。人口地理结构与距离模型的隔离一致，表明地质高速距离可能是该物种中的主要机制驱动差异。来自阿根廷的罗伯维尔人群与东部血统有关，建议最近东部南部的南美洲殖民化，但墨西哥，中美洲和南美洲的额外抽样需要进一步澄清他们的起源。最后，我们发现了人口营业额或更换的实例，突出了人口结构的时间不稳定。

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