Genetics, Vol 136, 225-230, Copyright © 1994


INVESTIGATIONS

Co-Segregation of Intermale Aggression With the Pseudoautosomal Region of the Y Chromosome in Mice

P. L. Roubertoux, M. Carlier, H. Degrelle, M. C. Haas-Dupertuis, J. Phillips and R. Moutier
U.R.A. 1294 C.N.R.S. Genetique, Neurogenetique, Comportement, Universite Paris-V Rene Descartes, 75270 Paris, Cedex 06, France

The sexual dimorphism of aggression has led to a search for its Y chromosomal correlates. We have previously confirmed that initiation of attack behavior against a conspecific male is Y-dependent in two strains of laboratory mice (NZB and CBA/H). We provide evidence that the non-pseudoautosomal region of the Y is not involved and that only the pseudoautosomal region of the Y is correlated with initiation of attack behavior. The autosomal correlates also contribute to this behavior in an additive or interactive manner with the pseudoautosomal correlates.


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