Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/3448
Title: Morphological Integration of the Mandible in Yellow-Necked Field Mice: the Effects of B Chromosomes
Authors: Jojić, Vida
Blagojević, Jelena
Ivanović, Ana 
Bugarski-Stanojević, Vanja
Vujošević, Mladen
Keywords: Apodemus flavicollis;B chromosomes;mandible;morphological integration
Issue Date: Jun-2007
Publisher: American Society of Mammalogists
Project: grant 143011G
Journal: Journal of Mammalogy
Abstract: 
As a complex skeletal organ consisting of 2 functional and developmental units (ascending ramus and alveolar region), the mandible represents a well-established model in morphological integration studies. The concept of morphological integration assumes that developmentally or functionally related traits are more correlated than others and hence evolve together. We compared the level and pattern of mandibular morphological integration between groups of adult yellow-necked field mice (Apodemus flavicollis), with and without B chromosomes (Bs) in a population from Mt. Avala, Serbia. Bs are dispensable supernumerary chromosomes characterized by irregular and non–Mendelian modes of inheritance. The level of morphological integration was higher in animals with Bs. One of the 2 regions of the mandible tested (alveolar region) was significantly more affected by the presence of Bs than the other, with an increase in intensity of integration of 41.61% versus 15.86%. The hypothesis of morphological integration, which postulates disunion of the mandible into 2 distinct functional and developmental modules, was confirmed in animals with Bs. Bs probably have a function because they affect mandible phenotype (although the mechanism is unknown), increase variability within populations, and could lead to selective advantage.
URI: https://biore.bio.bg.ac.rs/handle/123456789/3448
DOI: 10.1644/06-MAMM-A-019R1.1
Appears in Collections:Journal Article

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