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Absence of Y-chromosome introgression across the hybrid zone between Mus musculus domesticus and Mus musculus musculus

Published online by Cambridge University Press:  14 April 2009

F. Vanlerberghe ,
B. Dod ,
P. Boursot ,
M. Bellis  and
F. Bonhomme
F. Vanlerberghe
Affiliation:
Institut des Sciences de l'Evolution, Université de Montpellier II, 34060 Montpellier, France
B. Dod
Affiliation:
Structure et Fonctionnement du Génome Eucaryote, CNRS-INSERM, Institut de Biologie, 34060 Montpellier, France
P. Boursot
Affiliation:
Institut des Sciences de l'Evolution, Université de Montpellier II, 34060 Montpellier, France
M. Bellis
Affiliation:
Structure et Fonctionnement du Génome Eucaryote, CNRS-INSERM, Institut de Biologie, 34060 Montpellier, France
F. Bonhomme
Affiliation:
Institut des Sciences de l'Evolution, Université de Montpellier II, 34060 Montpellier, France
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A cloned Y-specific sequence (Bishop et al. 1985) was used as a diagnostic probe to distinguish between Mus musculus domesticus and Mus musculus musculusY-chromosomes. Analysis of the RFLPs obtained with genomic DNA isolated from wild mice caught along the contact zone between M. m. domesticus and M. m. musculus in Bulgaria and Denmark showed that the Y-chromosome flow between the two semi-species is very limited. The degree of Y-chromosome penetration was compared with that of seven diagnostic autosomal loci and the mitochondrial DNA. Breeding experiments showed that the lack of Y-chromosome introgression from one semispecies to the other was not due to a major hybrid breakdown. The results suggest that the disruption of differentiated co-adapted gene systems could play a role in limiting Y-introgression.

Type
Research Article
Information
Genetics Research , Volume 48 , Issue 3 , December 1986 , pp. 191 - 197
Copyright
Copyright © Cambridge University Press 1986

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