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Phylogeographic surveys and apomictic genetic connectivity in the North Atlantic red seaweed Mastocarpus stellatus.
Mol Phylogenet Evol. 2016 Jan; 94(Pt B):463-472.MP

Abstract

The North Atlantic red alga Mastocarpus stellatus is characterized by two life histories (sexual-type and direct-type), which correspond to two geographically isolated breeding groups. These features enable M. stellatus to be an interesting model to investigate how environmental shift and apomictic propagation have influenced its population genetic structure, historical demography and distribution dynamic. To test these ideas, we obtained 456 specimens from 15 locations on both sides of the North Atlantic and sequenced portion of the nuclear internal transcribed spacer (ITS), mitochondrial cox2-3 region (COX) and plastid RuBisCo spacer (RLS). Median-joining networks and ML trees inferred from COX and RLS consistently revealed two gene lineages (mtDNA: CN, CS; cpDNA: RN, RS). The concatenated COX and RLS markers yielded three cytotypes: a northern CN-RN, a southern CS-RS and a mixed cytotype CS-RN, which enabled us to roughly separate samples into D (direct-type life-cycle) and S (sexual-type life-cycle) groups (northern CN-RN and mixed cytotype CS-RN=D; southern CS-RS=S). Pairwise FST analysis of the D group revealed a high level of genetic differentiation both along European coasts and across the Atlantic basin. Bayesian skyline plots (BSPs) and IMa analyses indicated that M. stellatus underwent slight demographic expansion at the late-Pleistocene, with the beginning of divergence between lineages dating to c. 0.189Ma (95%HPD: 0.083-0.385Ma). IMa analyses also revealed asymmetric genetic exchange among European populations and a predominant postglacial trans-Atlantic migration from Norway and Galway Bay to North America. Our study highlights the importance of phylogeographic approaches to discover the imprints of climate change, life histories and gene flow in driving population genetic connectivity and biogeographic distribution of intertidal seaweeds in the North Atlantic.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Li JJ
Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing 100049, China.
Hu ZM
Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China. Electronic address: huzimin9712@163.com.
Liu RY
Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing 100049, China.
Zhang J
Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing 100049, China.
Liu SL
Department of Life Science, Tunghai University, Taichung 40704, Taiwan.
Duan DL
Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China. Electronic address: dlduan@qdio.ac.cn.

MeSH

Base SequenceBayes TheoremClimate ChangeDNA, ChloroplastDNA, MitochondrialGene FlowGenetic VariationGenetics, PopulationNorth AmericaPhylogenyPhylogeographyRhodophytaSeaweedSequence Analysis, DNA

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26528630

Citation

Li, Jing-Jing, et al. "Phylogeographic Surveys and Apomictic Genetic Connectivity in the North Atlantic Red Seaweed Mastocarpus Stellatus." Molecular Phylogenetics and Evolution, vol. 94, no. Pt B, 2016, pp. 463-472.
Li JJ, Hu ZM, Liu RY, et al. Phylogeographic surveys and apomictic genetic connectivity in the North Atlantic red seaweed Mastocarpus stellatus. Mol Phylogenet Evol. 2016;94(Pt B):463-472.
Li, J. J., Hu, Z. M., Liu, R. Y., Zhang, J., Liu, S. L., & Duan, D. L. (2016). Phylogeographic surveys and apomictic genetic connectivity in the North Atlantic red seaweed Mastocarpus stellatus. Molecular Phylogenetics and Evolution, 94(Pt B), 463-472. https://doi.org/10.1016/j.ympev.2015.10.029
Li JJ, et al. Phylogeographic Surveys and Apomictic Genetic Connectivity in the North Atlantic Red Seaweed Mastocarpus Stellatus. Mol Phylogenet Evol. 2016;94(Pt B):463-472. PubMed PMID: 26528630.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Phylogeographic surveys and apomictic genetic connectivity in the North Atlantic red seaweed Mastocarpus stellatus. AU - Li,Jing-Jing, AU - Hu,Zi-Min, AU - Liu,Ruo-Yu, AU - Zhang,Jie, AU - Liu,Shao-Lun, AU - Duan,De-Lin, Y1 - 2015/10/31/ PY - 2014/12/04/received PY - 2015/10/18/revised PY - 2015/10/26/accepted PY - 2015/11/4/entrez PY - 2015/11/4/pubmed PY - 2016/7/9/medline KW - Apomictic propagation KW - Demographic history KW - Gene flow KW - Mastocarpus stellatus KW - Palaeoclimatic oscillation KW - Population genetic structure SP - 463 EP - 472 JF - Molecular phylogenetics and evolution JO - Mol Phylogenet Evol VL - 94 IS - Pt B N2 - The North Atlantic red alga Mastocarpus stellatus is characterized by two life histories (sexual-type and direct-type), which correspond to two geographically isolated breeding groups. These features enable M. stellatus to be an interesting model to investigate how environmental shift and apomictic propagation have influenced its population genetic structure, historical demography and distribution dynamic. To test these ideas, we obtained 456 specimens from 15 locations on both sides of the North Atlantic and sequenced portion of the nuclear internal transcribed spacer (ITS), mitochondrial cox2-3 region (COX) and plastid RuBisCo spacer (RLS). Median-joining networks and ML trees inferred from COX and RLS consistently revealed two gene lineages (mtDNA: CN, CS; cpDNA: RN, RS). The concatenated COX and RLS markers yielded three cytotypes: a northern CN-RN, a southern CS-RS and a mixed cytotype CS-RN, which enabled us to roughly separate samples into D (direct-type life-cycle) and S (sexual-type life-cycle) groups (northern CN-RN and mixed cytotype CS-RN=D; southern CS-RS=S). Pairwise FST analysis of the D group revealed a high level of genetic differentiation both along European coasts and across the Atlantic basin. Bayesian skyline plots (BSPs) and IMa analyses indicated that M. stellatus underwent slight demographic expansion at the late-Pleistocene, with the beginning of divergence between lineages dating to c. 0.189Ma (95%HPD: 0.083-0.385Ma). IMa analyses also revealed asymmetric genetic exchange among European populations and a predominant postglacial trans-Atlantic migration from Norway and Galway Bay to North America. Our study highlights the importance of phylogeographic approaches to discover the imprints of climate change, life histories and gene flow in driving population genetic connectivity and biogeographic distribution of intertidal seaweeds in the North Atlantic. SN - 1095-9513 UR - https://www.unboundmedicine.com/medline/citation/26528630/Phylogeographic_surveys_and_apomictic_genetic_connectivity_in_the_North_Atlantic_red_seaweed_Mastocarpus_stellatus_ DB - PRIME DP - Unbound Medicine ER -
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