Tracking adaptation in selfing plant populations
| Autor: | Navascues, Miguel, Becheler, Arnaud, Jullien, Margaux, Frachon, Lea, Libourel, Cyril, Villoutreix, Romain, Ronfort, Joelle, Roux, Fabrice, Vitalis, Renaud, Gay, Laurène |
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| Přispěvatelé: | Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Laboratoire des interactions plantes micro-organismes (LIPM), Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS), Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut Jacques Monod. Paris, FRA., Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 (Evo-Eco-Paléo (EEP)) |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Conférence Jacques Monod "Coalescence des approches théoriques et expérimentales en génomique évolutive et biologie des systèmes" Conférence Jacques Monod "Coalescence des approches théoriques et expérimentales en génomique évolutive et biologie des systèmes", Apr 2016, Roscoff, France. 2016 Conférence Jacques Monod "Coalescence des approches théoriques et expérimentales en génomique évolutive et biologie des systèmes", Apr 2016, Roscoff, France., 2016 |
| DOI: | 10.6084/m9.figshare.4036098.v1 |
| Popis: | Plants exhibit a large diversity of reproductive systems but only a small proportion of them reproduce mainly by selfing. Despite the two-fold transmission advantage of self-fertilization, selfing is considered as an “evolutionary dead end”. Theoretical predictions suggest that selfing reduces the effective population size, which in turn may reduce the adaptive potential of populations and the efficiency of selection. In addition, due to recombination events between identical haplotypes, the effective recombination is also reduced, thereby favoring the accumulation of slightly deleterious mutations. Whether highly selfing populations can rapidly track environmental changes is an open question. In our work, we characterized the contemporary evolution of two populations of highly selfing species, i.e. Arabidopsis thaliana and Medicago truncatula. The A. thaliana population is located in Burgundy and seeds were sampled in 2002 and 2010, whereas the M. truncatula population is located in Corsica and seeds were sampled in 1987 and 2009. In both species, heritable changes between the two sampling years were evidenced for some phenotypic traits when grown in common garden conditions. Genomic regions under selection were identified by a temporal-FST genome-scan approach, which was adapted to the case of self-fertilization. The power of the method was assessed through simulations which identified a maximum selfing rate from which neutral and selected loci are indistinguishable. When applied to the A. thaliana population, several biological processes related to either plant development or response to abiotic and biotic stresses were identified as enriched in single nucleotide polymorphisms (SNPs) with significant FST values. In contrast, no significant SNPs were identified in M. truncatula. In agreement with our predictions based on simulations, this result confirms that the outlier test is not applicable to a population with such a high selfing rate and the persistence of multi-locus genotypes through time. Other approaches will be necessary to identify the action of selection in such highly selfing populations. |
| Databáze: | OpenAIRE |
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