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Post-Pleistocene demographic history of the North Atlantic endemic Irish moss Chondrus crispus: glacial survival, spatial expansion and gene flow

文献类型：期刊论文

作者Hu, Z. M.1; Li, W.1,2; Li, J. J.1,2; Duan, D. L.1
刊名JOURNAL OF EVOLUTIONARY BIOLOGY
出版日期2011-03-01
卷号24期号:3页码:505-517
关键词Chondrus Crispus Glacial Refugium Late Pleistocene Phylogeography Population Expansion
ISSN号1010-061X
DOI10.1111/j.1420-9101.2010.02186.x
文献子类Article
英文摘要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.
学科主题Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity
URL标识查看原文
语种英语
WOS记录号WOS:000287531900004
公开日期2012-07-03
源URL[http://ir.qdio.ac.cn/handle/337002/11920]  
专题海洋研究所_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
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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来源：海洋研究所

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