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Genetic conflict outweighs heterogametic incompatibility in the mouse hybrid zone?

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    0309465 - ÚBO 2009 ES eng A - Abstract
    Macholán, Miloš - Baird, S. J. E. - Munclinger, P. - Dufková, P. - Bímová, Barbora - Piálek, Jaroslav
    Genetic conflict outweighs heterogametic incompatibility in the mouse hybrid zone?
    Annual meeting of the Society for Molecular Biology and Evolution. Barcelona: AOPC, 2008. P-381.
    [Annual Meeting of the Society for Molecular Biology and Evolution. 05.06.2008-08.06.2008, Barcelona]
    Institutional research plan: CEZ:AV0Z60930519; CEZ:AV0Z50450515
    Keywords : mouse hybrid zone
    Subject RIV: EB - Genetics ; Molecular Biology
    http://www.aopc.es/abst/obtimpres.php?idAbst=224

    The Mus musculus musculus/M. m. domesticus contact zone in Europe is characterised by sharp frequency discontinuities in sex chromosome markers at the centre and wider clines in allozyme frequencies. We identify a triangular area (approximately 330 km2) where the musculus Y chromosome introgresses across this front for up to 22 km into domesticus territory. Introgression of the Y chromosome is accompanied by a perturbation of the trapping sex ratio: the sex ratio is significantly female-biased in musculus localities and domesticus localities with no Y chromosome introgression. In contrast, where the musculus Y is detected in domesticus localities, the sex ratio is close to parity, and significantly different from both classes of female biased localities. The geographic position of an abrupt cline in an X chromosome marker, and autosomal clines centred on the same position, seem unaffected by the musculus Y introgression. We conclude that sex ratio distortion is playing a role in the geographic separation of speciation genes in this section of the mouse hybrid zone. We suggest that clines for genes involved in sex-ratio distortion have escaped from the centre of the mouse hybrid zone, causing decay in the barrier to gene flow between the two house mouse taxa.
    Permanent Link: http://hdl.handle.net/11104/0161588

     
     
Number of the records: 1  

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