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Genetic diversity and population differentiation of the freshwater copepod Sinocalanus tenellus (Calanoida, Centropagidae) in China

Xiaoyu Wang, Xiaolin Ma, Wei Hu, Mingbo Yin
  • Xiaoyu Wang
    Fudan University, School of Life Science, China
  • Xiaolin Ma
    Fudan University, School of Life Science, China
  • Wei Hu
    Fudan University, School of Life Science, China

Abstract

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.

Keywords

Copepods; genetic diversity; COI gene; population differentiations; China.

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Submitted: 2017-11-27 15:49:34
Published: 2018-04-12 00:00:00
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Copyright (c) 2018 Xiaoyu Wang, Xiaolin Ma, Wei Hu, Mingbo Yin

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