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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >Mitochondrial DNA Detects a Complex Evolutionary History with Pleistocene Epoch Divergence for the Neotropical Malaria Vector Anopheles nuneztovari Sensu Lato.
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Mitochondrial DNA Detects a Complex Evolutionary History with Pleistocene Epoch Divergence for the Neotropical Malaria Vector Anopheles nuneztovari Sensu Lato.

机译：线粒体DNA检测到新热带疟疾媒介按蚊nuneztovari Sensu Lato的更新世时代发散的复杂进化历史。

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Abstract. Cryptic species and lineages characterize Anopheles nuneztovari s.l. Gabaldon, an important malaria vector in South America. We investigated the phylogeographic structure across the range of this species with cytochrome oxidase subunit I (COI) mitochondrial DNA sequences to estimate the number of clades and levels of divergence. Bayesian and maximum-likelihood phylogenetic analyses detected four groups distributed in two major monophyletic clades (I and II). Samples from the Amazon Basin were clustered in clade I, as were subclades II-A and II-B, whereas those from Bolivia/Colombia/Venezuela were restricted to one basal subclade (II-C). These data, together with a statistical parsimony network, confirm results of previous studies that An. nuneztovari is a species complex consisting of at least two cryptic taxa, one occurring in Colombia and Venezuela and the another occurring in the Amazon Basin. These data also suggest that additional incipient species may exist in the Amazon Basin. Divergence time and expansion tests suggested that these groups separated and expanded in the Pleistocene Epoch. In addition, the COI sequences clearly separated An. nuneztovari s.l. from the closely related species An. dunhami Causey, and three new records are reported for An. dunhami in Amazonian Brazil. These findings are relevant for vector control programs in areas where both species occur. Our analyses support dynamic geologic and landscape changes in northern South America, and infer particularly active divergence during the Pleistocene Epoch for New World anophelines.
机译：抽象。隐性物种和血统是努氏按蚊的特征。 Gabaldon，南美重要的疟疾媒介。我们用细胞色素氧化酶亚基I（COI）线粒体DNA序列调查了该物种范围内的系统地理结构，以估计进化枝的数量和水平的差异。贝叶斯和最大似然系统发育分析检测到四个组分布在两个主要的单系进化枝（I和II）中。来自亚马逊河流域的样本聚集在第I进化枝中，第II-A和II-B则是聚类的，而来自玻利维亚/哥伦比亚/委内瑞拉的样本则被限制在一个基类（II-C）中。这些数据与统计简约网络一起，证实了An。的先前研究结果。 nuneztovari是一个物种复合体，由至少两个隐性分类单元组成，一个在哥伦比亚和委内瑞拉发生，另一个在亚马逊河流域发生。这些数据还表明，亚马逊河流域可能还存在其他初期物种。发散时间和扩展测试表明，这些组在更新世时期分离并扩展。此外，COI序列清楚地分隔了An。努涅斯托瓦里湖来自密切相关的物种An。 dunhami Causey，并为An报告了三个新记录。巴西亚马逊地区的dunhami。这些发现与两个物种都发生的地区的媒介控制计划有关。我们的分析支持南美洲北部的动态地质和景观变化，并推断新世界按蚊的更新世时期尤其活跃。

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