Recombination is suppressed and variability reduced in a nascent Y chromosome
| Autor: | Nicolas Perrin, Julie Jaquiéry, Laura Berset-Brändli |
|---|---|
| Přispěvatelé: | Université de Lausanne (UNIL) |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Genetic Markers
Male 0106 biological sciences [SDV]Life Sciences [q-bio] Biology Y chromosome 010603 evolutionary biology 01 natural sciences Genetic recombination Linkage Disequilibrium 03 medical and health sciences Gene Frequency Y Chromosome Animals Genetic variability Ecology Evolution Behavior and Systematics ComputingMilieux_MISCELLANEOUS 030304 developmental biology Recombination Genetic Genetics 0303 health sciences Genetic Variation Chromosome Sex Determination Processes Hyla arborea Background selection biology.organism_classification Female Anura Heterogametic sex Recombination |
| Zdroj: | Journal of Evolutionary Biology Journal of Evolutionary Biology, Wiley, 2007, 20 (3), pp.1182-1188. ⟨10.1111/j.1420-9101.2006.01278.x⟩ Journal of Evolutionary Biology 3 (20), 1182-1188. (2007) |
| ISSN: | 1010-061X 1420-9101 |
| Popis: | Several hypotheses have been elaborated to account for the evolutionary decay commonly observed in full-fledged Y chromosomes. Enhanced drift, background selection and selective sweeps, which are expected to result from reduced recombination, may all share responsibilities in the initial decay of proto-Y chromosomes, but little empirical information has been gathered so far. Here we take advantage of three markers that amplify on both of the morphologically undifferentiated sex chromosomes of the European tree frog (Hyla arborea) to show that recombination is suppressed in males (the heterogametic sex) but not in females. Accordingly, genetic variability is reduced on the Y, but in a way that can be accounted for by merely the number of chromosome copies per breeding pair, without the need to invoke background selection or selective sweeps. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text