Evolution of genetic variability in a population of the edible snail, Helix aspersa Müller, undergoing domestication and short-term selection
| Autor: | J. C. Bonnet, J. Mallard, J. M. Blanc, Mathilde Dupont-Nivet |
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| Přispěvatelé: | ProdInra, Migration, Unité de recherche Génétique des Poissons (UGP), Institut National de la Recherche Agronomique (INRA), Unité d'heliciculture, Station d'hydrobiologie |
| Rok vydání: | 2001 |
| Předmět: |
Male
0106 biological sciences PEDIGREE [SDV]Life Sciences [q-bio] Population Zoology Breeding Biology 010603 evolutionary biology 01 natural sciences Evolution Molecular 03 medical and health sciences PROBABILITY OF GENES ORIGIN Control line Genetic variation Genetics Animals Genetic variability Domestication education ComputingMilieux_MISCELLANEOUS PROBABILITE D'ORIGINE DE GENES Genetics (clinical) Selection (genetic algorithm) 030304 developmental biology 0303 health sciences education.field_of_study [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology Natural selection Helix Snails VARIANCE GENETIQUE ADDITIVE Genetic Variation GENETIQUE ADDITIVE GENETIC VARIANCE [SDV] Life Sciences [q-bio] Evolutionary biology Animals Domestic HELIX ASPERSA Female Directed Molecular Evolution Inbreeding [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology ARTIFICIAL SELECTION NATURAL SELECTION |
| Zdroj: | Heredity Heredity, Nature Publishing Group, 2001, 87, pp.129-135 Heredity, Nature Publishing Group, 2001, pp.129-135 |
| ISSN: | 1365-2540 0018-067X |
| DOI: | 10.1046/j.1365-2540.2001.00836.x |
| Popis: | The evolution of genetic variability is studied in six successive generations of a population originating from wild Helix aspersa. During the first three generations (G1 to G3), no artificial selection was applied. During the next three generations (G4 to G6), two lines were reared: a control line (C) and a line (S) selected for increased adult weight. Genetic variability is described by genealogical parameters (inbreeding, number of founders, effective number of founders and ancestors, effective number of remaining genomes) and by the additive genetic variance in adult weight. A large decrease in all parameters was observed between G1 and G2, suggesting strong natural selection: additive genetic variance in adult weight (transformed data) decreased from 0.0119 +/- 3.8 x 10(-3) to 0.0070 +/- 1.7 x 10(-3) (P0.05) and effective number of ancestors from 97.4 to 67.0. Selection also caused a large decrease during the first generation: additive genetic variance was 0.0079 +/- 2.1 x 10(-3) in G3 and 0.0040 +/- 1.1 x 10(-3) after the first selection cycle (P0.02). At the same time, the effective number of ancestors decreased from 59.2 to 29.5 and 24.2. This decrease is consistent with the theory of selection and the Bulmer effect. |
| Databáze: | OpenAIRE |
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