Global phylogeographic limits of Hawaii's avian malaria
Global phylogeographic limits of Hawaii's avian malaria
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DOI：
10.1098/rspb.2006.3671
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发表时间：
2006-12-07
影响因子：
4.7
通讯作者：
Fleischer, Robert C.
中科院分区：
文献类型：
--
作者：
Beadell, Jon S.;Ishtiaq, Farah;Fleischer, Robert C.
禽疟疾（残留疟原虫）传入夏威夷，为研究外来疾病对未感染宿主种群的影响提供了一个模型系统。然而，人们对夏威夷疟疾的起源或遗传变异知之甚少，传统的分类方法混淆了将寄生虫置于全球生态和进化背景下的尝试。使用片段的寄生虫线粒体基因细胞色素B和核基因二氢叶酸还原酶-胸苷酸合成酶从全球范围内的调查超过13 000个鸟类样本，我们表明，夏威夷的禽疟疾，这可能会导致高死亡率，是一个主要的限制因素，为许多物种的本地雀形目，代表只是众多的谱系组成的形态寄生虫物种之一。在夏威夷发现的单一寄生虫谱系在全球范围内具有广泛的宿主分布，并在其他几个偏远的海洋岛屿上占主导地位，包括百慕大和莫雷阿，法属波利尼西亚。这种血统在大陆新世界的罕见性和密切相关的血统的限制，旧世界表明限制传播的生殖隔离寄生虫群体内的形态物种。
The introduction of avian malaria (Plasmodium relictum) to Hawaii has provided a model system for studying the influence of exotic disease on naive host populations. Little is known, however, about the origin or the genetic variation of Hawaii's malaria and traditional classification methods have confounded attempts to place the parasite within a global ecological and evolutionary context. Using fragments of the parasite mitochondrial gene cytochrome b and the nuclear gene dihydrofolate reductase-thymidylate synthase obtained from a global survey of greater than 13 000 avian samples, we show that Hawaii's avian malaria, which can cause high mortality and is a major limiting factor for many species of native passerines, represents just one of the numerous lineages composing the morphological parasite species. The single parasite lineage detected in Hawaii exhibits a broad host distribution worldwide and is dominant on several other remote oceanic islands, including Bermuda and Moorea, French Polynesia. The rarity of this lineage in the continental New World and the restriction of closely related lineages to the Old World suggest limitations to the transmission of reproductively isolated parasite groups within the morphological species.