Institutional Repository of Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences
| Post-Pleistocene demographic history of the North Atlantic endemic Irish moss Chondrus crispus: glacial survival, spatial expansion and gene flow | |
| Hu, Z. M.1; Li, W.1,2; Li, J. J.1,2; Duan, D. L.1 | |
| 2011-03-01 | |
| 发表期刊 | JOURNAL OF EVOLUTIONARY BIOLOGY
 |
| ISSN | 1010-061X |
| 卷号 | 24期号:3页码:505-517 |
| 文章类型 | Article |
| 摘要 | Range expansions and gene flow as micro-evolutionary processes played a leading role in the population demographic history of marine organisms. Herein, we sequenced partial mtDNA Cox1 gene from 26 assigned geographical populations to understand how Irish moss (Chondrus crispus) responded to severe climatic oscillations during the Pleistocene glaciations and contemporary forces such as gene flow. Phylogeographic patterns indicated that haplotype frequency distributions were strongly skewed, with nearly half found only in single samples and thus restricted to a single population. Analysis of molecular variance revealed that most of the variation was within populations with no significant genetic structuring on either side of the Atlantic. Demographic analyses indicated that ISI (Irish Sea and Ireland) and NS (the North Sea) areas experienced a slight trend of increase in population size over time, whereas EC (the English Channel) area experienced expansion beginning approximately 170 000-360 000 BP. The observed complex genetic pattern of C. crispus is consistent with a scenario of multiple unrelated founding events by survival of this species in at least three putative Pleistocene refugia along the European coastline, and subsequent trans-Atlantic dispersal combined with contiguous northward population expansion predating the LGM and geographically gene flow.; Range expansions and gene flow as micro-evolutionary processes played a leading role in the population demographic history of marine organisms. Herein, we sequenced partial mtDNA Cox1 gene from 26 assigned geographical populations to understand how Irish moss (Chondrus crispus) responded to severe climatic oscillations during the Pleistocene glaciations and contemporary forces such as gene flow. Phylogeographic patterns indicated that haplotype frequency distributions were strongly skewed, with nearly half found only in single samples and thus restricted to a single population. Analysis of molecular variance revealed that most of the variation was within populations with no significant genetic structuring on either side of the Atlantic. Demographic analyses indicated that ISI (Irish Sea and Ireland) and NS (the North Sea) areas experienced a slight trend of increase in population size over time, whereas EC (the English Channel) area experienced expansion beginning approximately 170 000-360 000 BP. The observed complex genetic pattern of C. crispus is consistent with a scenario of multiple unrelated founding events by survival of this species in at least three putative Pleistocene refugia along the European coastline, and subsequent trans-Atlantic dispersal combined with contiguous northward population expansion predating the LGM and geographically gene flow. |
| 关键词 | Chondrus Crispus Glacial Refugium Late Pleistocene Phylogeography Population Expansion |
| 学科领域 | Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity |
| DOI | 10.1111/j.1420-9101.2010.02186.x |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000287531900004 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/11919 |
| 专题 | 实验海洋生物学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Hu, Z. M.,Li, W.,Li, J. J.,et al. Post-Pleistocene demographic history of the North Atlantic endemic Irish moss Chondrus crispus: glacial survival, spatial expansion and gene flow[J]. JOURNAL OF EVOLUTIONARY BIOLOGY,2011,24(3):505-517. |
| APA | Hu, Z. M.,Li, W.,Li, J. J.,&Duan, D. L..(2011).Post-Pleistocene demographic history of the North Atlantic endemic Irish moss Chondrus crispus: glacial survival, spatial expansion and gene flow.JOURNAL OF EVOLUTIONARY BIOLOGY,24(3),505-517. |
| MLA | Hu, Z. M.,et al."Post-Pleistocene demographic history of the North Atlantic endemic Irish moss Chondrus crispus: glacial survival, spatial expansion and gene flow".JOURNAL OF EVOLUTIONARY BIOLOGY 24.3(2011):505-517. |
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