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首页> 外文期刊>Marine biology research >Low genetic diversity and lack of genetic structure in the giant jellyfish Nemopilema nomurai in Chinese coastal waters
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Low genetic diversity and lack of genetic structure in the giant jellyfish Nemopilema nomurai in Chinese coastal waters

机译：中国沿海水域大型水母Nemopilema nomurai的遗传多样性低且缺乏遗传结构

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摘要

The giant jellyfish Nemopilema nomurai is a scyphozoan species well-known in East Asian Marginal Seas for its damage to fisheries. The genetic diversity and population structure of N. nomurai, collected from five geographic regions in Chinese coastal seas, were examined based on mitochondrial cytochrome c oxidase subunit I (COI) gene and nuclear internal transcribed spacer one (ITS1) sequences. A total of 26 and five unique haplotypes were recovered from the COI and ITS1 genes, respectively. The overall genetic diversity of N. nomurai calculated by the COI and ITS1 sequences was low (haplotype diversity 0.727% and 0.108%, nucleotide diversity 0.212% and 0.039%). The median-joining network analysis revealed a star-like haplotype network. The hierarchical Analysis of Molecular Variance (AMOVA) of COI haplotypes showed that N. nomurai populations form a single population, with a low FST (0.0149, p = 0.1036). The dispersal ability, together with the biological characteristics, could be important factors for the lack of a geographically structured pattern in N. nomurai in Chinese coastal waters.
机译：巨大的水母Nemopilema nomurai是一种在东亚边缘海中众所周知的海豚，因为其对渔业的损害。基于线粒体细胞色素C氧化酶亚基I（COI）基因和核内转录间隔区一（ITS1）序列，对中国沿海五个地理区域的野村猪笼草的遗传多样性和种群结构进行了研究。从COI和ITS1基因中分别回收了总共26种和5种独特的单倍型。通过COI和ITS1序列计算得出的野村猪笼草的总体遗传多样性较低（单体型多样性为0.727％和0.108％，核苷酸多样性为0.212％和0.039％）。中位连接网络分析显示了一个星形单倍型网络。 COI单倍型的分子变异（AMOVA）的层次分析表明，野村猪笼草种群形成单个种群，FST低（0.0149，p = 0.1036）。扩散能力以及生物学特性可能是造成中国沿海水域野村猪笼草缺乏地理结构格局的重要因素。

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