Chromosome Synapsis and Recombination in Male Hybrids between Two Chromosome Races of the Common Shrew (Sorex araneus L., Soricidae, Eulipotyphla)

Hybrid zones between chromosome races of the common shrew ( ) provide exceptional models to study the potential role of chromosome rearrangements in the initial steps of speciation. The Novosibirsk and Tomsk races differ by a series of Robertsonian fusions with monobrachial homology. They form a nar...

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Bibliographic Details
Published in:Genes 2017-10, Vol.8 (10), p.282
Main Authors: Belonogova, Nadezhda M, Polyakov, Andrei V, Karamysheva, Tatyana V, Torgasheva, Anna A, Searle, Jeremy B, Borodin, Pavel M
Format: Article
Language:English
Subjects:
Chromosome rearrangements
Chromosomes
Heterozygotes
Homology
Homozygotes
Hybrid zones
Hybrids
Karyotypes
Linkage disequilibrium
Meiosis
Races
Recombination
Sorex araneus
Speciation
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Summary:Hybrid zones between chromosome races of the common shrew ( ) provide exceptional models to study the potential role of chromosome rearrangements in the initial steps of speciation. The Novosibirsk and Tomsk races differ by a series of Robertsonian fusions with monobrachial homology. They form a narrow hybrid zone and generate hybrids with both simple (chain of three chromosomes) and complex (chain of eight or nine) synaptic configurations. Using immunolocalisation of the meiotic proteins, we examined chromosome pairing and recombination in males from the hybrid zone. Homozygotes and simple heterozygotes for Robertsonian fusions showed a low frequency of synaptic aberrations (
ISSN:2073-4425
2073-4425
DOI:10.3390/genes8100282