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The genetic basis of response in mouse lines divergently selected for body weight or fat content. I. The relative contributions of autosomal and sex-linked genes

Published online by Cambridge University Press:  14 April 2009

Ian M. Hastings  and
Roel F. Veerkamp
Ian M. Hastings*
Affiliation:
Institute of Cell, Animal and Population Biology, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, Scotland
Roel F. Veerkamp
Affiliation:
Genetics and Behavioural Sciences Department, Scottish Agricultural College, West Mains Road, Edinburgh EH9 3JG, Scotland and AFRC Roslin Institute, Roslin, EH25 9PS, Scotland
*
* Corresponding author.

Summary

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Lines of mice have been divergently selected for over forty generations on either body weight or fat content. Reciprocal crosses were made between the divergent lines and the offspring backcrossed to the parental lines. The resulting data allowed us to investigate the genetic basis of response, including two features of particular interest: (i) the relative contribution of autosomal and sex-linked genes and whether any significant Y chromosome or cytoplasmic effects were present (ii) the mechanism of gene action, whether predominantly additive or whether significant dominance effects were present. A large additive sex-linked effect was observed in lines selected on body weight which accounted for approximately 25% of the divergence. The remaining 75% of the divergence appeared to be autosomal. There was no apparent sex-linked effect in lines selected on fat content and the response appeared to be entirely autosomal and additive.

Type
Research Article
Information
Genetics Research , Volume 62 , Issue 3 , December 1993 , pp. 169 - 175
Copyright
Copyright © Cambridge University Press 1993

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