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Spatial and Temporal Dynamics of Contact Zones Between Chromosomal Races of House Mice, on Madeira Island.
Genes (Basel)
July 2020
CESAM - Centro de Estudos do Ambiente e do Mar, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, Portugal.
Analysis of contact zones between parapatric chromosomal races can help our understanding of chromosomal divergence and its influence on the speciation process. Monitoring the position and any movement of contact zones can allow particular insights. This study investigates the present (2012-2014) and past (1998-2002) distribution of two parapatric house mouse chromosomal races-PEDC (Estreito da Calheta) and PADC (Achadas da Cruz)-on Madeira Island, aiming to identify changes in the location and width of their contact.
View Article and Find Full Text PDFExtensive Amplification of Telomeric Repeats in the Karyotypically Highly Diverse African Pygmy Mice.
Cytogenet Genome Res
September 2017
Institut des Sciences de l'Evolution (ISEM), UMR 5554, CNRS/Université Montpellier/IRD/EPHE, Montpellier, France.
Telomeres are ribonucleoprotein structures protecting the physical ends of eukaryotic chromosomes. However, telomeric sequences can also occur at non-terminal regions of chromosomes, forming the so-called interstitial telomeric sequences (ITSs). Some ITSs are considered as relics of past chromosomal rearrangements and as such provide important insights into karyotype evolution.
View Article and Find Full Text PDFR2d2 Drives Selfish Sweeps in the House Mouse.
Mol Biol Evol
June 2016
Department of Genetics, The University of North Carolina at Chapel Hill Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill Carolina Center for Genome Science, The University of North Carolina at Chapel Hill
A selective sweep is the result of strong positive selection driving newly occurring or standing genetic variants to fixation, and can dramatically alter the pattern and distribution of allelic diversity in a population. Population-level sequencing data have enabled discoveries of selective sweeps associated with genes involved in recent adaptations in many species. In contrast, much debate but little evidence addresses whether "selfish" genes are capable of fixation-thereby leaving signatures identical to classical selective sweeps-despite being neutral or deleterious to organismal fitness.
View Article and Find Full Text PDFPhylogeny and adaptation shape the teeth of insular mice.
Proc Biol Sci
February 2016
Laboratoire de Biométrie et Biologie Evolutive, UMR 5558, CNRS, Université Lyon 1, Campus de la Doua, Villeurbanne 69622, France
By accompanying human travels since prehistorical times, the house mouse dispersed widely throughout the world, and colonized many islands. The origin of the travellers determined the phylogenetic source of the insular mice, which encountered diverse ecological and environmental conditions on the various islands. Insular mice are thus an exceptional model to disentangle the relative role of phylogeny, ecology and climate in evolution.
View Article and Find Full Text PDFChromosomal polymorphism in mammals: an evolutionary perspective.
Biol Rev Camb Philos Soc
February 2017
Evolutionary Genomics Group, Department of Botany and Zoology, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch, 7062, South Africa.
Although chromosome rearrangements (CRs) are central to studies of genome evolution, our understanding of the evolutionary consequences of the early stages of karyotypic differentiation (i.e. polymorphism), especially the non-meiotic impacts, is surprisingly limited.
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