Phylogeographic structuring of Plasmodium lineages across the north american range of the house finch (Carpodacus mexicanus)
Phylogeographic structuring of Plasmodium lineages across the north american range of the house finch (Carpodacus mexicanus)
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DOI：
10.1645/ge-639r.1
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发表时间：
2006-10-01
影响因子：
1.3
通讯作者：
Lovette, Irby J.
中科院分区：
文献类型：
--
作者：
Kimura, Mari;Dhondt, Andre A.;Lovette, Irby J.
禽类血吸虫地理分布的决定因素还知之甚少。在广泛的地理范围内从一个禽类寄主物种中采样寄生虫是一种公认的方法，可以将寄主物种分布的潜在影响与与寄主物种生物学没有直接关系的地理效应分开。我们使用聚合酶链式反应对北美大陆8个地点采集的490只家雀(Carpodacus Micianus)的血吸虫感染进行了筛查。为了探索寄生虫谱系分布的地理模式，我们对感染77只家雀的疟原虫物种的线粒体细胞色素b基因的一部分进行了测序。我们鉴定了5种不同的疟原虫单倍型，分别代表3个谱系，可能代表3个物种。在我们检测到疟原虫物种的所有地点，一个谱系是常见的。第二个谱系包含3个单倍型，它们在整个大陆范围内显示出系统地理结构，其中1个单倍型在北美东部常见，2个单倍型在北美西部常见。第三个分化谱系是从个体寄主恢复的。综合考虑，疟原虫细胞色素b谱系在家雀范围内的部分系统地理结构表明，寄生虫谱系分布不仅仅取决于寄主物种的分布，其他因素，如节肢动物媒介能力和分布可能是重要的。
The determinants of the geographic distribution of avian hematozoa are poorly understood. Sampling parasites from one avian host species across a wide geographic range is an accepted approach to separate the potential influence of host species distribution from geographic effects not directly related to host species biology. We used polymerase chain reaction to screen samples for hematozoan infection from 490 house finches (Carpodacus mexicanus) collected at 8 sites spanning continental North America. To explore geographic patterns of parasite lineage distributions, we sequenced a portion of the mitochondrial cytochrome b gene of Plasmodium species infecting 77 house finches. We identified 5 distinct Plasmodium haplotypes representing 3 lineages that likely represent 3 species. One lineage was common at all sites where we detected Plasmodium species. The second lineage contained 3 haplotypes that showed phylogeographic structuring on a continent-wide scale, with 1 haplotype common in eastern North America and 2 common in western North America. The third divergent lineage was recovered from I individual host. Considered together, the partial phylogeographic structuring of Plasmodium cytochrome b lineages over the range of the house finch suggests that parasite lineage distribution is not solely dependent on host species distribution, and other factors such as arthropod vector competence and distribution may be important.