Lack of genetic structure in the jellyfish Pelagia noctiluca (Cnidaria: Scyphozoa: Semaeostomeae) across European seas.
Lack of genetic structure in the jellyfish Pelagia noctiluca (Cnidaria: Scyphozoa: Semaeostomeae) across European seas.
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DOI：
10.1016/j.ympev.2010.07.004
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发表时间：
2010-10
影响因子：
4.1
通讯作者：
Katja Stopar;A. Ramšak;P. Trontelj;A. Malej
中科院分区：
文献类型：
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作者：
Katja Stopar;A. Ramšak;P. Trontelj;A. Malej
根据对144只水母成虫的研究，推测了全远洋钵水母Pelagia acetyluca的遗传结构。研究领域是欧洲两个海洋（东大西洋和地中海）的五个地理区域。分析了655 bp的线粒体细胞色素c氧化酶亚基I（COI）序列和645 bp的两个核内转录间隔区（ITS 1和ITS 2）序列。编码COI蛋白的基因表现出更高水平的分歧比合并核ITS片段（单倍型多样性0.962 vs.0.723，核苷酸多样性1.16% vs.0.31%）。COI基因的系统地理学分析显示，两个分支，较大的标本组成的所有采样点，和较小的主要形成的标本来自地中海。单倍型多样性是非常高的整个采样区，样本内的多样性高于地理区域之间的多样性。没有强烈支持的遗传或地理上不同的群体P. gratuluca. The结果-长距离的传播，不显著的FST值，缺乏隔离的距离-指向一个混合物之间的地中海和东大西洋种群。
The genetic structure of the holopelagic scyphozoan Pelagia noctiluca was inferred based on the study of 144 adult medusae. The areas of study were five geographic regions in two European seas (Eastern Atlantic and Mediterranean Sea). A 655-bp sequence of mitochondrial cytochrome c oxidase subunit I (COI), and a 645-bp sequence of two nuclear internal transcribed spacers (ITS1 and ITS2) were analyzed. The protein coding COI gene showed a higher level of divergence than the combined nuclear ITS fragment (haplotype diversity 0.962 vs. 0.723, nucleotide diversity 1.16% vs. 0.31%). Phylogeographic analysis on COI gene revealed two clades, the larger consisting of specimens from all sampling sites, and the smaller mostly formed of specimens from the Mediterranean Sea. Haplotype diversity was very high throughout the sampled area, and within sample diversity was higher than diversity among geographical regions. No strongly supported genetically or geographically distinct groups of P. noctiluca were found. The results – long distance dispersal, insignificant FSTvalues, lack of isolation by distance – pointed toward an admixture among Mediterranean and East Atlantic populations.