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首页> 外文期刊>Journal of Parasitology >PHYLOGEOGRAPHIC STRUCTURING OF PLASMODIUM LINEAGES ACROSS THE NORTH AMERICAN RANGE OF THE HOUSE FINCH (CARPODACUS MEXICANUS)
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PHYLOGEOGRAPHIC STRUCTURING OF PLASMODIUM LINEAGES ACROSS THE NORTH AMERICAN RANGE OF THE HOUSE FINCH (CARPODACUS MEXICANUS)

机译：横纹雀科北美洲范围的疟原虫谱系的地理结构

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摘要

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 1 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.
机译：人们对禽血红素地理分布的决定因素了解甚少。在广泛的地理范围内从一种鸟类寄主物种中取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区分开。我们使用聚合酶链反应从北美洲大陆的8个地点收集了490只雀科（Carpodacus mexicanus）的血吸虫感染样本。为了探索寄生谱系分布的地理模式，我们对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，感染了77只雀。我们确定了5种不同的疟原虫单倍型，它们代表了3个谱系，可能代表了3个物种。在我们检测到疟原虫物种的所有站点中，一个谱系很常见。第二个谱系包含3个在整个大陆范围内均表现出地理结构的单倍型，其中1个单倍型常见于北美东部，2个常见于北美西部。第三发散谱系从1个个体宿主中回收。综合考虑，在雀科范围内的疟原虫细胞色素b谱系的部分系统地理结构表明，寄生虫谱系分布不仅取决于宿主物种的分布，其他节肢动物媒介能力和分布等因素也可能很重要。

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