Genetic diversity and population differentiation of the freshwater copepod Sinocalanus tenellus (Calanoida, Centropagidae) in China
Genetic diversity and population differentiation of the freshwater copepod Sinocalanus tenellus (Calanoida, Centropagidae) in China
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中国淡水桡足类纤足动物遗传多样性及种群分化
DOI：
10.4081/jlimnol.2018.1731
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发表时间：
2018-04
影响因子：
1.6
通讯作者：
Mingbo Yin
中科院分区：
文献类型：
--
作者：
Xiaoyu Wang;Xiaolin Ma;Wei Hu;Mingbo Yin
桡足类广泛存在于各种水体中，是淡水生态系统的重要组成部分，其生物多样性在海洋和淡水生态系统中得到了广泛的研究。然而，没有先前的遗传数据可以用来评估中国淡水桡足类动物的种群遗传多样性和分化。对中国采集的11个柔嫩螺旋藻种群(个体湖泊)的线粒体细胞色素C氧化酶亚基I基因进行了序列分析，其中10个种群具有较高的遗传多样性。种群间存在着从低到高的种群分化。有趣的是，在WLS(内蒙古乌梁素市)和其他地方之间检测到了显著的遗传分化，表明东亚地区存在两个柔嫩螺旋藻的谱系。此外，我们发现两个不同的细毛链霉菌分支被参考的“中华链霉菌”分支分开，这表明它们是细毛链霉菌隐种复合体的一部分。本研究将有助于了解中国淡水生态系统中桡足类的多样性和生物地理学。
Copepods, present in a wide range of water bodies, are an important component of freshwater ecosystems and their biodiversity has been much studied in marine and freshwater ecosystems. However, no previous genetic data are available that allow an assessment of population-genetic diversity and differentiation of the copepod Sinocalanus tenellus from Chinese freshwaters. We analyzed DNA sequences of the mitochondrial cytochrome c oxidase subunit I ( COI ) gene from eleven S. tenellus populations (individual lakes) from China, ten of which exhibited a high genetic diversity. Low to high population differentiation was detected among the populations. Interestingly, substantial genetic divergence was detected between WLS (Wuliangsu, in Inner Mongolia) and other locations, indicating the presence of two lineages of S. tenellus in East Asia. Moreover, we found that two distinct clades of S. tenellus were separated by the reference “ S. sinensis ” clade, suggesting they were parts of a complex of cryptic species of S. tenellus . This study will contribute to an understanding of the diversity and biogeography of copepods in freshwater ecosystem in China.
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