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Heterosis among lines of mice selected for body weight: 3. Thermoregulation

Published online by Cambridge University Press:  14 April 2009

Carol Becker Lynch ,
R. C. Roberts  and
W. G. Hill
Carol Becker Lynch
Affiliation:
Department of Biology, Wesleyan University, Middletown, CT 06457
R. C. Roberts
Affiliation:
Institute of Animal Genetics, University of Edinburgh, West Mains Road, Edinburgh EH9 3JN
W. G. Hill
Affiliation:
Institute of Animal Genetics, University of Edinburgh, West Mains Road, Edinburgh EH9 3JN
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Crosses were made among 18 lines of mice, six previously selected for large 6-week weight, six for small 6-week weight, and six unselected controls, comprising a complete diallel cross among sizes and a partial diallel cross among replicate lines within sizes, and all purebred matings. Across all groups large size was associated with lower weight-specific food consumption and brown adipose tissue, and increased nest-building. Overall the crosses had lower weight-specific food consumption, and increased nest-building, body temperature, and brown adipose tissue than the purebreds. In general, heterosis in crosses between lines of different size, especially those involving large lines, tended to exceed that in crosses between lines of the same size.

Type
Research Article
Information
Genetics Research , Volume 48 , Issue 2 , October 1986 , pp. 95 - 100
Copyright
Copyright © Cambridge University Press 1986

References

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