Effect of landscape features on the genetic structure of forest duikers (Cephalophinae) in Moukalaba forest, Gabon
Effect of landscape features on the genetic structure of forest duikers (Cephalophinae) in Moukalaba forest, Gabon
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DOI：
10.1007/s42991-022-00301-y
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发表时间：
2022-08-30
影响因子：
1.6
通讯作者：
Yamagiwa，Juichi
中科院分区：
文献类型：
--
作者：
Akomo-Okoue，Etienne Francois;Inoue，Eiji;Yamagiwa，Juichi
动物种群内的扩散和基因流动受到景观组成和配置的影响。在这项研究中，我们的特点是人口遗传结构的三个共存的森林小羚羊物种（Cephalophinae）在约250平方公里的Moukalaba-Doudou国家公园，加蓬。我们获得了11个常染色体微卫星位点的基因型，并测序了线粒体DNA控制区的一部分（~ 600 bp）。利用微卫星进行的个体识别分析表明，我们获得了82个蓝背小羚羊个体，6个海湾小羚羊个体和15个黄背小羚羊个体。线粒体和微卫星分析结果表明，在每个物种中，存在两个遗传上不同的亚群。一个山区的建议，导致观察到的遗传分化的蓝小羚羊，而河流可能作为一个遗传障碍的黄背小羚羊。这两个物种之间的遗传障碍的差异也可以通过身体大小的差异来解释。在蓝色小羚羊种群中，两个遗传上不同的亚群被认为最近接触过。这表明，在穆卡拉巴的蓝色小羚羊的人口历史可能是复杂的，虽然小羚羊连续分布。在这项研究中，使用线粒体和微卫星数据，我们描述了共存的小羚羊的遗传结构，表明不同的景观特征限制了不同物种的基因流。
Dispersal and gene flow within an animal population are influenced by the composition and configuration of the landscape. In this study, we characterized the population genetic structures of three coexistent forest duiker species (Cephalophinae) in an approximately 250 km2area of Moukalaba-Doudou National Park, Gabon. We obtained genotypes of 11 autosomal microsatellite loci and sequenced a portion of the mitochondrial DNA control region (~ 600 bp). Individual identification analyses using microsatellites showed that we obtained 82 blue, 6 bay, and 15 yellow-backed duiker individuals. In each species, mitochondrial and microsatellite results showed that there were two genetically different subpopulations. A mountainous area was suggested to cause the observed genetic differentiation in the blue duiker, while a river might act as a genetic barrier for yellow-backed duiker. The difference in genetic barriers between the two species might also be explained by the difference in body size. In the blue duiker population, two genetically different subpopulations were suggested to have recently come into contact. This suggests that the population history of blue duiker in Moukalaba may be complex, although duikers were continuously distributed. In this study, using both mitochondrial and microsatellite data, we described the genetic structure of coexistent duikers, suggesting that different landscape features limited gene flow in different species.