Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect
14 pages, 4 figures, 4 tables, 1 appendix, supporting information https://dx.doi.org/10.1111/mec.13717
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Wiley-Blackwell
2016-07
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| Subjects: | Clonality, Coding sequences, Hybridization, Population genomics, Polyploidy, |
| Online Access: | http://hdl.handle.net/10261/135313 http://dx.doi.org/10.13039/501100000781 http://dx.doi.org/10.13039/501100001665 http://dx.doi.org/10.13039/100008510 http://dx.doi.org/10.13039/100000014 http://dx.doi.org/10.13039/501100003329 |
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dig-icm-es-10261-1353132022-04-05T08:01:22Z Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect Ament-Velásquez, S.L. Figuet, E. Ballenghien, M. Zattara, Eduardo E. Norenburg, J.L. Fernández-Álvarez, Fernando Ángel Bierne, J. Bierne, N. Galtier, N. European Research Council Agence Nationale de la Recherche (France) University of Maryland Smithsonian Institution Ministerio de Economía y Competitividad (España) Clonality Coding sequences Hybridization Population genomics Polyploidy 14 pages, 4 figures, 4 tables, 1 appendix, supporting information https://dx.doi.org/10.1111/mec.13717 Comparative population genetics in asexual vs. sexual species offers the opportunity to investigate the impact of asexuality on genome evolution. Here, we analyse coding sequence polymorphism and divergence patterns in the fascinating Lineus ribbon worms, a group of marine, carnivorous nemerteans with unusual regeneration abilities, and in which asexual reproduction by fissiparity is documented. The population genomics of the fissiparous L. pseudolacteus is characterized by an extremely high level of heterozygosity and unexpectedly elevated πN/πS ratio, in apparent agreement with theoretical expectations under clonal evolution. Analysis of among-species allele sharing and read-count distribution, however, reveals that L. pseudolacteus is a triploid hybrid between Atlantic populations of L. sanguineus and L. lacteus. We model and quantify the relative impact of hybridity, polyploidy and asexuality on molecular variation patterns in L. pseudolacteus and conclude that (i) the peculiarities of L. pseudolacteus population genomics result in the first place from hybridization and (ii) the accumulation of new mutations through the Meselson effect is more than compensated by processes of heterozygosity erosion, such as gene conversion or gene copy loss. This study illustrates the complexity of the evolutionary processes associated with asexuality and identifies L. pseudolacteus as a promising model to study the first steps of polyploid genome evolution in an asexual context This work was supported by European Research Council grant 232971 (PopPhyl), Agence Nationale de la Recherche grants ANR-10-BINF-01-01 (Ancestrome) and ANR-11-BSV7-007 (Clonix), the Erasmus Mundus Master Programme in Evolutionary Biology, a University of Maryland and Smithsonian Institution Seed Grant for Research, and Ministry of Economy and Competitiveness of Spain predoctoral grant BES-2013-063551 Peer Reviewed 2016-08-04T09:16:05Z 2016-08-04T09:16:05Z 2016-07 2016-08-04T09:16:10Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1111/mec.13717 issn: 0962-1083 e-issn: 1365-294X Molecular Ecology 25(14): 3356-3369 (2016) http://hdl.handle.net/10261/135313 10.1111/mec.13717 http://dx.doi.org/10.13039/501100000781 http://dx.doi.org/10.13039/501100001665 http://dx.doi.org/10.13039/100008510 http://dx.doi.org/10.13039/100000014 http://dx.doi.org/10.13039/501100003329 https://dx.doi.org/10.1111/mec.13717 Sí none Wiley-Blackwell |
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Clonality Coding sequences Hybridization Population genomics Polyploidy Clonality Coding sequences Hybridization Population genomics Polyploidy |
| spellingShingle |
Clonality Coding sequences Hybridization Population genomics Polyploidy Clonality Coding sequences Hybridization Population genomics Polyploidy Ament-Velásquez, S.L. Figuet, E. Ballenghien, M. Zattara, Eduardo E. Norenburg, J.L. Fernández-Álvarez, Fernando Ángel Bierne, J. Bierne, N. Galtier, N. Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect |
| description |
14 pages, 4 figures, 4 tables, 1 appendix, supporting information https://dx.doi.org/10.1111/mec.13717 |
| author2 |
European Research Council |
| author_facet |
European Research Council Ament-Velásquez, S.L. Figuet, E. Ballenghien, M. Zattara, Eduardo E. Norenburg, J.L. Fernández-Álvarez, Fernando Ángel Bierne, J. Bierne, N. Galtier, N. |
| format |
artículo |
| topic_facet |
Clonality Coding sequences Hybridization Population genomics Polyploidy |
| author |
Ament-Velásquez, S.L. Figuet, E. Ballenghien, M. Zattara, Eduardo E. Norenburg, J.L. Fernández-Álvarez, Fernando Ángel Bierne, J. Bierne, N. Galtier, N. |
| author_sort |
Ament-Velásquez, S.L. |
| title |
Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect |
| title_short |
Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect |
| title_full |
Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect |
| title_fullStr |
Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect |
| title_full_unstemmed |
Population genomics of sexual and asexual lineages in fissiparous ribbon worms (Lineus, Nemertea): hybridization, polyploidy and the Meselson effect |
| title_sort |
population genomics of sexual and asexual lineages in fissiparous ribbon worms (lineus, nemertea): hybridization, polyploidy and the meselson effect |
| publisher |
Wiley-Blackwell |
| publishDate |
2016-07 |
| url |
http://hdl.handle.net/10261/135313 http://dx.doi.org/10.13039/501100000781 http://dx.doi.org/10.13039/501100001665 http://dx.doi.org/10.13039/100008510 http://dx.doi.org/10.13039/100000014 http://dx.doi.org/10.13039/501100003329 |
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