Rapid evolution of post-zygotic reproductive isolation is widespread in Arctic plant lineages

Autor: Lucas Marie-Orleach, Christian Brochmann, Loren H. Rieseberg, A. Lovisa S. Gustafsson, Galina Gussarova, Liv Borgen, Hajime Ikeda, Alexandre Antonelli
Přispěvatelé: Natural History Museum [Oslo], University of Oslo (UiO), University of Tromsø (UiT), Okayama University, University of Gothenburg (GU), University of Oxford [Oxford], Royal Botanic Gardens, Kew, Ecosystèmes, biodiversité, évolution [Rennes] (ECOBIO), Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES), University of British Columbia (UBC), University of Oxford, Royal Botanic Gardens [Kew], Université de Rennes (UR)-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS), Natural History Museum, Molecular Life Science, Knut and Alice Wallenberg Foundation, Royal Botanic Gardens, University of Oslo, Svalbard Science Forum, Norwegian Polar Institute, Czech Science Foundation, Academy of Sciences of the Czech Republic, Swedish Research Council, Swedish Foundation for Strategic Research
Rok vydání: 2021
Předmět:
Zdroj: Annals of Botany
Annals of Botany, Oxford University Press (OUP), 2021, ⟨10.1093/aob/mcab128⟩
Annals of Botany, 2022, 129 (2), pp.171-184. ⟨10.1093/aob/mcab128⟩
ISSN: 0305-7364
1095-8290
DOI: 10.1093/aob/mcab128⟩
Popis: Background and Aims The Arctic tundra, with its extreme temperatures and short growing season, is evolutionarily young and harbours one of the most species-poor floras on Earth. Arctic species often show little phenotypic and genetic divergence across circumpolar ranges. However, strong intraspecific post-zygotic reproductive isolation (RI) in terms of hybrid sterility has frequently evolved within selfing Arctic species of the genus Draba. Here we assess whether incipient biological species are common in the Arctic flora. Methods We conducted an extensive crossing experiment including six species representing four phylogenetically distant families collected across the circumpolar Arctic. We crossed conspecific parental populations representing different spatial scales, raised 740 F1 hybrids to maturity and measured fertility under laboratory conditions. We examined genetic divergence between populations for two of these species (Cardamine bellidifolia and Ranunculus pygmaeus). Key Results In five of the six species, we find extensive reduction in pollen fertility and seed set in F1 hybrids; 219 (46 %) of the 477 F1 hybrids generated between parents separated by ≥427 km had Conclusion We show that post-zygotic RI has developed multiple times within taxonomically recognized Arctic species belonging to several distantly related lineages, and that RI may have developed over just a few millennia. Rapid and widespread evolution of incipient biological species in the Arctic flora might be associated with frequent bottlenecks due to glacial cycles, and/or selfing mating systems, which are common in the harsh Arctic environment where pollinators are scarce.
Databáze: OpenAIRE
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