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A note on the relationship between litter size at birth and litter weight at weaning in domesticated and feral mice

Published online by Cambridge University Press:  02 September 2010

W. R. Congleton Jr
W. R. Congleton Jr
Affiliation:
Department of Animal and Veterinary Sciences, University of Maine, Orono, Maine 04469, USA
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Abstract

The relationship between litter size at birth and litter weight at weaning is curvilinear, with an intermediate litter size resulting in the heaviest litter weight at weaning. Relative to feral mice, the mean and variation for litter size at birth was larger for domesticated mice which had been selected for fertility and crossbred. Consequently, some of the litters from the crossbred domesticated mice were larger than the litter size at birth which optimized litter weight at weaning, primarily due to increased pre-weaning mortality. If litter weight at weaning is to be optimized by indirect selection for litter size at birth, the variation around an intermediate optimum litter size at birth could be most effectively reduced by negative assortative mating.

Type
Research Article
Information
Animal Production , Volume 33 , Issue 2 , October 1981 , pp. 219 - 222
Copyright
Copyright © British Society of Animal Science 1981

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References

REFERENCES

Allaire, F. R. 1977. Corrective mating methods in context of breeding theory. J. Dairy Sci. 60: 1799–1806.Google Scholar
Allaire, F. R. 1980. Mate selection by selection index theory. Theor. appl. Genet. 57: 267–272.Google Scholar
Bereskin, B., Shelby, C. E. and Cox, D. F. 1973. Some factors affecting pig survival. J. Anim. Sci. 36: 821–827.Google Scholar
Billie, N., Nielsen, N. C., Larsen, J. L. and Svendesen, J. 1974. Preweaning mortality in pigs. II. The perinatal period. Nord. VetMed. 26: 294–313.Google Scholar
Bradford, G. E. and Nott, C. F. G. 1969. Genetic control of ovulation rate and embryo survival in mice. II. Effects of crossing in selected lines. Genetics, Princeton 63: 907–917.Google Scholar
Glastonbury, J. R. W. 1976. A survey of preweaning mortality in the pig. Aust. vet. J. 52: 272–276.Google Scholar
Hartsock, T. G. and Graves, H. B., 1976. Neonatal behavior and nutrition-related mortality in domestic swine. J. Anim. Sci. 42: 235–241.CrossRefGoogle ScholarPubMed
Nielsen, N. C., Christensen, K., Billie, N. and Larsen, J. L. 1974. Preweaning mortality in pigs. I. Herd investigations. Nord. VetMed. 26: 137–150.Google Scholar