Effects of complex life cycles on genetic diversity: cyclical parthenogenesis
| Autor: | Florent Malrieu, Katja Reichel, Romuald Rouger, Jean-Pierre Masson, Solenn Stoeckel |
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| Přispěvatelé: | Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Centre National de la Recherche Scientifique (CNRS), Université Francois Rabelais [Tours], Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, 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), AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine [SDV]Life Sciences [q-bio] Population Parthenogenesis Genomics Biology 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Genetic drift Human population genetics Genetic variation Genetics Animals Computer Simulation education Genetics (clinical) Selection (genetic algorithm) Genetic diversity education.field_of_study Life Cycle Stages Models Statistical Models Genetic Null model Genetic Drift Genetic Variation Markov Chains 030104 developmental biology Genetics Population Evolutionary biology Original Article |
| Zdroj: | Heredity Heredity, 2016, 117 (5), pp.336-347. ⟨10.1038/hdy.2016.52⟩ Heredity, Nature Publishing Group, 2016, 117 (5), pp.336-347. ⟨10.1038/hdy.2016.52⟩ |
| ISSN: | 0018-067X |
| DOI: | 10.1038/hdy.2016.52⟩ |
| Popis: | International audience; Neutral patterns of population genetic diversity in species with complex life cycles are difficult to anticipate. Cyclical parthenogenesis (CP), in which organisms undergo several rounds of clonal reproduction followed by a sexual event, is one such life cycle. Many species, including crop pests (aphids), human parasites (trematodes) or models used in evolutionary science (Daphnia), are cyclical parthenogens. It is therefore crucial to understand the impact of such a life cycle on neutral genetic diversity. In this paper, we describe distributions of genetic diversity under conditions of CP with various clonal phase lengths. Using a Markov chain model of CP for a single locus and individual-based simulations for two loci, our analysis first demonstrates that strong departures from full sexuality are observed after only a few generations of clonality. The convergence towards predictions made under conditions of full clonality during the clonal phase depends on the balance between mutationsand genetic drift. Second, the sexual event of CP usually resets the genetic diversity at a single locus towards predictions made under full sexuality. However, this single recombination event is insufficient to reshuffle gametic phases towards full-sexuality predictions. Finally, for similar levels of clonality, CP and acyclic partial clonality (wherein a fixed proportion of individuals are clonally produced within each generation) differentially affect the distribution of genetic diversity. Overall, this work provides solid predictions of neutral genetic diversity that may serve as a null model in detecting the action of common evolutionary or demographic processes in cyclical parthenogens (for example, selection or bottlenecks). |
| Databáze: | OpenAIRE |
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