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首页> 美国卫生研究院文献>other >Mitochondrial DNA Markers Reveal High Genetic Diversity but Low Genetic Differentiation in the Black Fly Simulium tani Takaoka Davies along an Elevational Gradient in Malaysia
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Mitochondrial DNA Markers Reveal High Genetic Diversity but Low Genetic Differentiation in the Black Fly Simulium tani Takaoka Davies along an Elevational Gradient in Malaysia

机译：线粒体DNA标记揭示了马来西亚苍蝇模拟ani谷高冈和戴维斯沿高度梯度的高遗传多样性但低遗传分化

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摘要

The population genetic structure of Simulium tani was inferred from mitochondria-encoded sequences of cytochrome c oxidase subunits I (COI) and II (COII) along an elevational gradient in Cameron Highlands, Malaysia. A statistical parsimony network of 71 individuals revealed 71 haplotypes in the COI gene and 43 haplotypes in the COII gene; the concatenated sequences of the COI and COII genes revealed 71 haplotypes. High levels of genetic diversity but low levels of genetic differentiation were observed among populations of S. tani at five elevations. The degree of genetic diversity, however, was not in accordance with an altitudinal gradient, and a Mantel test indicated that elevation did not have a limiting effect on gene flow. No ancestral haplotype of S. tani was found among the populations. Pupae with unique structural characters at the highest elevation showed a tendency to form their own haplotype cluster, as revealed by the COII gene. Tajima’s D, Fu’s Fs, and mismatch distribution tests revealed population expansion of S. tani in Cameron Highlands. A strong correlation was found between nucleotide diversity and the levels of dissolved oxygen in the streams where S. tani was collected.
机译：从马来西亚金马仑高原沿海拔高度的线粒体编码的细胞色素C氧化酶亚基I（COI）和II（COII）的线粒体序列推断出Simulium tani的种群遗传结构。统计的简约网络由71个个体组成，揭示了COI基因的71个单倍型和COII基因的43个单倍型。 COI和COII基因的串联序列揭示了71个单倍型。在五个海拔高度的沙门氏菌种群中观察到高水平的遗传多样性，而低水平的遗传分化。然而，遗传多样性的程度并不符合海拔梯度，Mantel试验表明，海拔升高对基因流没有限制作用。在这些种群中未发现任何祖先单株型。如COII基因所揭示的，在最高海拔具有独特结构特征的up表现出形成自己的单倍型簇的趋势。 Tajima的D，Fu的Fs和失配分布测试显示，金马仑高原的塔尼丁哥（S. tani）人口不断增加。发现核苷酸多样性和收集沙门氏菌的溪流中的溶解氧水平之间存在很强的相关性。

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