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Short note: Laying hens may have lost important genes

Published online by Cambridge University Press:  01 August 2011

P. Sørensen  and
L. G. Christensen
P. Sørensen
Affiliation:
Danish Institute of Animal Science, Research Centre Foulum, P.O.Box 39, DK8830, Tjele, Denmark
L. G. Christensen
Affiliation:
The Royal Veterinary and Agriculture University of Denmark, Builowsvej 13, DK 1870, Frederiksberg C., Denmark
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Extract

The intensive genetic improvement of laying hens has created a hen with an enormous laying capacity when producing in cage systems. In later years, however, it has been obvious that genes or gene combinations which facilitate the birds' ability to interact with other hens in a flock are lost or suppressed due to the narrow breeding goal which has been maximum egg yield in cage systems.

Type
Research Articles
Information
Animal Genetic Resources/Resources génétiques animales/Recursos genéticos animales , Volume 21 , April 1997 , pp. 81
Copyright
Copyright © Food and Agriculture Organization of the United Nations 1997

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References

Sørensen, P. 1992. Selection, environment of layers and response on nesting behaviour. Proceedings of XVX World's Poultry Congress. Amsterdam. Vol. 2. 409412.Google Scholar