Phylogeographic data revealed shallow genetic structure in the kelp Saccharina japonica (Laminariales, Phaeophyta).
Phylogeographic data revealed shallow genetic structure in the kelp Saccharina japonica (Laminariales, Phaeophyta).
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系统发育地理学数据揭示了海带 Saccharina japonica（海带目、褐藻门）的浅层遗传结构
DOI：
10.1186/s12862-015-0517-8
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发表时间：
2015-11-02
影响因子：
3.4
通讯作者：
Duan DL
中科院分区：
文献类型：
--
作者：
Zhang J;Yao JT;Sun ZM;Fu G;Galanin DA;Nagasato C;Motomura T;Hu ZM;Duan DL
研究背景西北太平洋海洋生物的种群结构和遗传多样性具有复杂的格局，日本海带是沿着日本海沿岸重要的经济和生态海藻。然而，它仍然是知之甚少的群体遗传学和野生的地理格局。结果共收集到612条海洋COI和trnW-trnL基因序列。多样性指数表明S.北海道沿岸沿着的粳稻居群表现出最高的遗传多样性。种群结构的贝叶斯分析（BAPS）揭示了海带物种的四个聚类（聚类1：北海道和韩国;聚类2：北海道西北部;聚类3：俄罗斯远东;聚类4：中国）。从串联数据推断的网络表现出两个浅系谱对应于两个BAPS组（集群2和集群3）。我们没有检测到两个浅系谱之间的基因流，但系谱内的人群有不对称的基因交换。贝叶斯天际线图和中性测试表明，S。结论北海道沿岸可能是S.日本。基因交换法。japonicapustoms可能是人为干扰和海洋制度造成的。冰后期的扩张和基因交换显然导致了更多的共享单倍型和更少的分化，从而导致了目前的浅沟地理格局在日本。
BackgroundPopulation structure and genetic diversity of marine organisms in the Northwestern Pacific Ocean exhibited complex patterns.Saccharina japonicais a commercially and ecologically important kelp species widely distributed along the coast of Japan Sea. However, it is still poorly known about population genetics and phylogeographic patterns of wildS. japonicapopulations on a large geographic scale, which is an important contribution to breeding and conservation of this marine crop.ResultsWe collected 612 mitochondrialCOIandtrnW-trnL sequences. Diversity indices suggested thatS. japonicapopulations along the coast of Hokkaido exhibited the highest genetic diversity. Bayesian Analysis of Population Structure (BAPS) revealed four clusters in the kelp species (cluster 1: Hokkaido and South Korea; cluster 2: northwestern Hokkaido; cluster 3: Far Eastern Russia; cluster 4: China). The network inferred from concatenated data exhibited two shallow genealogies corresponding to two BAPS groups (cluster 2 and cluster 3). We did not detect gene flow between the two shallow genealogies, but populations within genealogy have asymmetric gene exchange. Bayesian skyline plots and neutrality tests suggested thatS. japonicaexperienced postglacial expansion around 10.45 ka.ConclusionsThe coast of Hokkaido might be the origin and diversification center ofS. japonica. Gene exchange amongS. japonicapopulations could be caused by anthropogenic interference and oceanographic regimes. Postglacial expansions and gene exchange apparently led to more shared haplotypes and less differentiation that in turn led to the present shallow phylogeographical patterns inS. japonica.