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Dioecy Is Associate...
Dioecy Is Associated with High Genetic Diversity and Adaptation Rates in the Plant Genus Silene
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- Muyle, Aline (författare)
- Univ Lyon 1, CNRS, Lab Biometrie & Biol Evolut, UMR 5558, Villeurbanne, France.;UC Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA USA.
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- Martin, Helene (författare)
- Univ Lille, CNRS, UMR 8198 Evo Ecopaleo, F-59000 Lille, France.;Univ Laval, Inst Biol Integrat & Syst, Dept Biol, Quebec City, PQ, Canada.
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- Zemp, Niklaus (författare)
- Swiss Fed Inst Technol, Inst Integrat Biol, Zurich, Switzerland.;Swiss Fed Inst Technol, Genet Divers Ctr GDC, Zurich, Switzerland.
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- Mollion, Maeva (författare)
- Aarhus Univ, Bioinformat Res Ctr, Aarhus C, Denmark.
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- Gallina, Sophie (författare)
- Univ Lille, CNRS, UMR 8198 Evo Ecopaleo, F-59000 Lille, France.
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- Tavares, Raquel (författare)
- Univ Lyon 1, CNRS, Lab Biometrie & Biol Evolut, UMR 5558, Villeurbanne, France.
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- Silva, Alexandre (författare)
- Ctr Interpretacao Serra Estrela CISE, Seia, Portugal.
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- Bataillon, Thomas (författare)
- Aarhus Univ, Bioinformat Res Ctr, Aarhus C, Denmark.
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- Widmer, Alex (författare)
- Swiss Fed Inst Technol, Inst Integrat Biol, Zurich, Switzerland.
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- Glemin, Sylvain (författare)
- Uppsala universitet,Växtekologi och evolution,Science for Life Laboratory, SciLifeLab,Univ Rennes, ECOBIO Ecosyst Biodiversite Evolut, CNRS, UMR 6553, Rennes, France.
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- Touzet, Pascal (författare)
- Univ Lille, CNRS, UMR 8198 Evo Ecopaleo, F-59000 Lille, France.
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- Marais, Gabriel A. B. (författare)
- Univ Lyon 1, CNRS, Lab Biometrie & Biol Evolut, UMR 5558, Villeurbanne, France.;Univ Lisbon, Inst Super Agron, LEAF Linking Landscape Environm Agr & Food, Lisbon, Portugal.
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Univ Lyon 1, CNRS, Lab Biometrie & Biol Evolut, UMR 5558, Villeurbanne, France;UC Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA USA. Univ Lille, CNRS, UMR 8198 Evo Ecopaleo, F-59000 Lille, France.;Univ Laval, Inst Biol Integrat & Syst, Dept Biol, Quebec City, PQ, Canada. (creator_code:org_t)
- 2020-09-14
- 2021
- Engelska.
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Ingår i: Molecular biology and evolution. - : Oxford University Press. - 0737-4038 .- 1537-1719. ; 38:3, s. 805-818
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Abstract
Ämnesord
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- About 15,000 angiosperm species (similar to 6%) have separate sexes, a phenomenon known as dioecy. Why dioecious taxa are so rare is still an open question. Early work reported lower species richness in dioecious compared with nondioecious sister clades, raising the hypothesis that dioecy may be an evolutionary dead-end. This hypothesis has been recently challenged by macroevolutionary analyses that detected no or even positive effect of dioecy on diversification. However, the possible genetic consequences of dioecy at the population level, which could drive the long-term fate of dioecious lineages, have not been tested so far. Here, we used a population genomics approach in the Silene genus to look for possible effects of dioecy, especially for potential evidence of evolutionary handicaps of dioecy underlying the dead-end hypothesis. We collected individual-based RNA-seq data from several populations in 13 closely related species with different sexual systems: seven dioecious, three hermaphroditic, and three gynodioecious species. We show that dioecy is associated with increased genetic diversity, as well as higher selection efficacy both against deleterious mutations and for beneficial mutations. The results hold after controlling for phylogenetic inertia, differences in species census population sizes and geographic ranges. We conclude that dioecious Silene species neither show signs of increased mutational load nor genetic evidence for extinction risk. We discuss these observations in the light of the possible demographic differences between dioecious and self-compatible hermaphroditic species and how this could be related to alternatives to the dead-end hypothesis to explain the rarity of dioecy.
Ämnesord
- NATURVETENSKAP -- Biologi -- Biologisk systematik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biological Systematics (hsv//eng)
Nyckelord
- sexual systems
- selection efficacy
- Allee effect
- population genetics
- RNA-seq
- angiosperms
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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- Av författaren/redakt...
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Muyle, Aline
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Martin, Helene
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Zemp, Niklaus
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Mollion, Maeva
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Gallina, Sophie
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Tavares, Raquel
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Silva, Alexandre
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Bataillon, Thoma ...
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Widmer, Alex
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Glemin, Sylvain
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Touzet, Pascal
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Marais, Gabriel ...
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- NATURVETENSKAP
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Molecular biolog ...
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Uppsala universitet