Počet záznamů: 1

Asymmetric size and shape variation in the Central European transect across the house mouse hybrid zone

  1. 1.
    0357736 - UZFG-Y 2011 RIV GB eng J - Článek v odborném periodiku
    Mikula, Ondřej - Auffray, J.C. - Macholán, Miloš
    Asymmetric size and shape variation in the Central European transect across the house mouse hybrid zone.
    Biological Journal of the Linnean Society. Roč. 101, - (2010), s. 13-27 ISSN 0024-4066
    Grant CEP: GA ČR GA206/06/0707; GA ČR GA206/08/0640
    Výzkumný záměr: CEZ:AV0Z50450515
    Klíčová slova: asymmetric variation * developmental instability * fluctuating asymmetry
    Kód oboru RIV: EG - Zoologie
    Impakt faktor: 2.166, rok: 2010

    We studied asymmetric variation of the mandible in the Central European portion of the hybrid zone between two house mouse subspecies, Mus musculus musculus and Mus musculus domesticus. Within introgression classes, defined by the share of diagnostic allozymes, we quantified the directional and fluctuating component of asymmetric variation, as well as skewness and kurtosis of individual asymmetry distributions. Furthermore, in the same manner we re-analysed asymmetric variation of the ventral side of the skull. According to the quadratic polynomial model, the mandible shape-fluctuating asymmetry, but not size-fluctuating asymmetry, was significantly decreased in the centre of the hybrid zone (with a minimum predicted for a hybrid index of 0.41). On the contrary, the skull shape-fluctuating asymmetry non-monotonically increased towards the musculus side of the hybrid zone (with a peak predicted for a hybrid index of 0.86). Thus, the impact of hybridization on fluctuating asymmetry is trait-specific in this portion of the house mouse hybrid zone. The only general feature of asymmetric variation we observed was the shift towards the platykurtosis of asymmetry distributions in the centre of the hybrid zone. Taken together, we suggest genetic variability for right–left asymmetries to be generally increased, but the developmental instability of mandible shape to be decreased, by hybridization. We hypothesize the decrease of developmental instability to be caused by overdominant effects on developmental dynamics rather than by increased heterozygosi
    Trvalý link: http://hdl.handle.net/11104/0195933
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