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Reproduction in the gilt. 2. The influence of gilt age at boar introduction on the attainment of puberty

Published online by Cambridge University Press:  02 September 2010

P. E. Hughes  and
D. J. A. Cole
P. E. Hughes
Affiliation:
Department of Agriculture and Horticulture, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leicestershire LE12 5RD
D. J. A. Cole
Affiliation:
Department of Agriculture and Horticulture, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leicestershire LE12 5RD
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Summary

Ten Landrace × (Landrace × Large White) young female pigs (gilts) were allocated to each of three growth rate treatments so that they attained 73 kg live weight at 135, 160 or 190 days of age. At 73 kg live weight the gilts were introduced to a vasectomized boar for 30 min each day, and were subsequently mated at the second oestrous period. The interval from boar introduction to puberty was 15·2 and 19·0 days respectively for gilts having first boar contact at 190 and 160 days of age, these intervals being significantly shorter (P<0·05) than the 34·3 days for the 135-day group. However, the mean ages at puberty of the 135- and 160-day groups (169·4 and 178·2 days respectively) were not significantly different but these gilts were significantly younger at puberty than the 190-day group (205·3 days). There were no significant differences between treatments for gilt live weight at puberty or first litter size.

Type
Research Article
Information
Animal Production , Volume 23 , Issue 1 , August 1976 , pp. 89 - 94
Copyright
Copyright © British Society of Animal Science 1976

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References

REFERENCES

Brooks, P. H. and Cole, D. J. A. 1969. The effect of boar presence on the age at puberty of gilts. Rep. Sch. Agric. Univ. Nott., pp. 74–77.Google Scholar
Brooks, P. H. and Cole, D. J. A. 1970. The effect of the presence of a boar on the attainment of puberty in gilts. J. Reprod. Fen. 23: 435–440.CrossRefGoogle ScholarPubMed
Brooks, P. H. and Cole, D. J. A. 1973. Meat production from pigs which have farrowed. 1. Reproductive performance and food conversion efficiency. Anim. Prod. 17: 305–315.Google Scholar
Hughes, P. E. and Cole, D. J. A. 1975. Reproduction in the gilt. 1. The influence of age and weight at puberty on ovulation rate and embryo survival in the gilt. Anim. Prod. 21: 183–189.Google Scholar