The interplay between host biogeography and phylogeny in structuring diversification of the feather louse genus Penenirmus
The interplay between host biogeography and phylogeny in structuring diversification of the feather louse genus Penenirmus
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DOI：
10.1016/j.ympev.2021.107297
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发表时间：
2021-09-03
影响因子：
4.1
通讯作者：
Dona, Jorge
中科院分区：
文献类型：
--
作者：
Johnson, Kevin P.;Weckstein, Jason D.;Dona, Jorge
寄生虫的多样性受到许多影响自由生活的生物体的物种形成的相同因素的影响，例如地理障碍。然而，宿主谱系的生态和进化也对寄生虫物种形成产生重大影响。在这里，我们探讨了在一组外寄生虱（昆虫纲：Phthiraptera：Penenirmus），啄木鸟，barbets，和honeyguides（Piciformes）和一些鸣禽（Passeriformes）的羽毛上的多样化的模式之间的相互作用。我们使用41个内组和12个外组样本的全基因组测序，从2395个单拷贝直向同源基因的参考集开发了一个DNA序列的双基因组数据集，总共有近400万个对齐的碱基位置。系统发育树的连接和基因树/物种树合并分析几乎是相同的，高度支持。这些树恢复属Penenirmus单系，并确定了几个主要的分支，这往往是与一个主要的主机组。然而，同源分析表明，主机转换是一个突出的过程中，这组的多样化。这种宿主转换通常发生在单一的主要地理区域内。然而，我们确实发现了一个案例，在这个案例中，一种从北美到非洲的啄木鸟谱系发生了一次罕见的传播事件，使得与之相关的虱子在非洲的啄木鸟中定居，尽管北美的啄木鸟谱系从未在那里建立。
Parasite diversification is influenced by many of the same factors that affect speciation of free-living organisms, such as biogeographic barriers. However, the ecology and evolution of the host lineage also has a major impact on parasite speciation. Here we explore the interplay between biogeography and host-association on the pattern of diversification in a group of ectoparasitic lice (Insecta: Phthiraptera: Penenirmus) that feeds on the feathers of woodpeckers, barbets, and honeyguides (Piciformes) and some songbirds (Passeriformes). We use whole genome sequencing of 41 ingroup and 12 outgroup samples to develop a phylogenomic dataset of DNA sequences from a reference set of 2395 single copy ortholog genes, for a total of nearly four million aligned base positions. The phylogenetic trees resulting from both concatenated and gene-tree/species-tree coalescent analyses were nearly identical and highly supported. These trees recovered the genus Penenirmus as monophyletic and identified several major clades, which tended to be associated with one major host group. However, cophylogenetic analysis revealed that host-switching was a prominent process in the diversification of this group. This host switching generally occurred within single major biogeographic regions. We did, however, find one case in which it appears that a rare dispersal event by a woodpecker lineage from North America to Africa allowed its associated louse to colonize a woodpecker in Africa, even though the woodpecker lineage from North America never became established there.