Host specificity of avian haemosporidian parasites is unrelated among sister lineages but shows phylogenetic signal across larger clades
Host specificity of avian haemosporidian parasites is unrelated among sister lineages but shows phylogenetic signal across larger clades
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DOI：
10.1016/j.ijpara.2018.05.005
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发表时间：
2018-10-01
影响因子：
4
通讯作者：
Bensch, Staffan
中科院分区：
文献类型：
--
作者：
Ellis, Vincenzo A.;Bensch, Staffan
寄生虫可以在它们感染的宿主物种的数量上有所不同，这种特性被称为“宿主特异性”。在这里，我们量化的系统发育信号的趋势，密切相关的物种，彼此相似，比远亲物种，在宿主特异性的禽血孢子虫寄生虫（属疟原虫，血变形菌和Leucocytozoon）使用Malavi，全球禽血孢子虫数据库的数据。我们使用定义寄生虫谱系的遗传数据（细胞色素B的479个碱基对）来产生属级的寄生虫基因。将宿主特异性数据与这些同源性相结合，在控制采样效应的同时，揭示了显着水平的系统发育信号;当考虑到宿主的系统发育多样性时，系统发育信号更高。然后，我们测试的相关性对姐妹谱系的主机特异性。所有三种寄生虫属的相关性一般接近于零。这些结果表明，虽然寄生虫姐妹谱系的宿主特异性不同，较大的分支可能是相对专业化或普遍化。(C)2018年由Elsevier Ltd代表澳大利亚寄生虫学会出版。
Parasites can vary in the number of host species they infect, a trait known as "host specificity". Here we quantify phylogenetic signal-the tendency for closely related species to resemble each other more than distantly related species-in host specificity of avian haemosporidian parasites (genera Plasmodium, Haemoproteus and Leucocytozoon) using data from MalAvi, the global avian haemosporidian database. We used the genetic data (479 base pairs of cytochrome b) that define parasite lineages to produce genus level phylogenies. Combining host specificity data with those phylogenies revealed significant levels of phylogenetic signal while controlling for sampling effects; phylogenetic signal was higher when the phylogenetic diversity of hosts was taken into account. We then tested for correlations in the host specificity of pairs of sister lineages. Correlations were generally close to zero for all three parasite genera. These results suggest that while the host specificity of parasite sister lineages differ, larger clades may be relatively specialised or generalised. (C) 2018 Published by Elsevier Ltd on behalf of Australian Society for Parasitology.