Počet záznamů: 1  

Where are the wormy mice? A re-examination of hybrid parasitism in the European house mouse hybrid zone

  1. 1. 0375980 - UBO-W 2013 RIV US eng J - Článek v odborném periodiku
    Baird, Stuart J. E. - Ribas, Alexis - Macholán, Miloš - Albrecht, Tomáš - Piálek, Jaroslav - Goüy de Bellocq, Joëlle
    Where are the wormy mice? A re-examination of hybrid parasitism in the European house mouse hybrid zone.
    Evolution. Roč. 66, č. 9 (2012), s. 2757-2772. ISSN 0014-3820
    Grant CEP: GA ČR GA206/08/0640
    Institucionální podpora: RVO:68081766 ; RVO:67985904
    Klíčová slova: helminths * Mus musculus domesticus * Mus musculus musculus * resistance * immune gene transitive compatibility
    Kód oboru RIV: EG - Zoologie
    Impakt faktor: 4.864, rok: 2012

    Wormy mice in a hybrid zone have been interpreted as evidence of low hybrid fitness, such that parasites contribute to species separation. However, because of its natural heterogeneity, observations of parasite load must be numerous with good field area coverage. We sampled 689 mice from 107 localities across the Bavaria-Bohemia region of the European house mouse hybrid zone and calculated their hybrid indices using 1401 diagnostic SNPs. We tested whether hybrids have greater or lesser diversity and load of parasite helminths than additive expectations, performing load analyses on the four most common taxa. We found hybrids have significantly reduced diversity and load of each of the commonest helminths; rarer helminths further support reduced load. While within-locality comparisons have little power, randomisation tests show the repeated pattern is unlikely to be due to local parasite heterogeneity, and simulations show a patch of low parasite diversity is unlikely to fall by chance just so in the field area, such that it produces the observed effects. Our data therefore contradict the idea that helminths reduce hybrid fitness through increased load. We discuss a vicariant Red Queen model that implies immune genes tracking parasites will escape Dobzhansky-Muller incompatibilities, generating hybrid variants untargeted by parasites.
    Trvalý link: http://hdl.handle.net/11104/0208501