CHROMOSOMAL REARRANGEMENTS DO NOT SEEM TO AFFECT THE GENE FLOW IN HYBRID ZONES BETWEEN KARYOTYPIC RACES OF THE COMMON SHREW (SOREX ARANEUS)

Chromosomal rearrangements are proposed to promote genetic differentiation between chromosomally differentiated taxa and therefore promote speciation. Due to their remarkable karyotypic polymorphism, the shrews of the Sorex araneus group were used to investigate the impact of chromosomal rearrangeme...

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Published in:Evolution 2012-03, Vol.66 (3), p.882-889
Main Authors: Horn, Agnès, Basset, Patrick, Yannic, Glenn, Banaszek, Agata, Borodin, Pavel M., Bulatova, Nina S., Jadwiszczak, Katarzyna, Jones, Ross M., Polyakov, Andrei V., Ratkiewicz, Miroslaw, Searle, Jeremy B., Shchipanov, Nikolai A., Zima, Jan, Hausser, Jacques
Format: Article
Language:English
Subjects:
Animals
BRIEF COMMUNICATIONS
Chromosome rearrangements
Chromosomes
Complexity
Differentiation
Evolution
Evolutionary genetics
Gene Flow
Genetic loci
Genetic structure
Genetic Variation
Genetics
Hybrid zones
Hybridity
Hybridization, Genetic
Interspecific
Karyotype
Microsatellites
Polymorphism
Robertsonian rearrangements
Rodents
Shrews
Shrews - genetics
Sorex araneus
Speciation
Taxa
Taxonomy
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Summary:Chromosomal rearrangements are proposed to promote genetic differentiation between chromosomally differentiated taxa and therefore promote speciation. Due to their remarkable karyotypic polymorphism, the shrews of the Sorex araneus group were used to investigate the impact of chromosomal rearrangements on gene flow. Five intraspecific chromosomal hybrid zones characterized by different levels of karyotypic complexity were studied using 16 microsatellites markers. We observed low levels of genetic differentiation even in the hybrid zones with the highest karyotypic complexity. No evidence of restricted gene flow between differently rearranged chromosomes was observed. Contrary to what was observed at the interspecific level, the effect of chromosomal rearrangements on gene flow was undetectable within the 5. araneus species.
ISSN:0014-3820
1558-5646
DOI:10.1111/j.1558-5646.2011.01478.x