Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-12-02T03:14:58.175Z Has data issue: false hasContentIssue false
  • English
  • Français

A note on the relationship between milk yield and reproductive performance in some British Friesian sire progeny groups

Published online by Cambridge University Press:  02 September 2010

P. D. P. Wood  and
J. P. Frappell
P. D. P. Wood
Affiliation:
Milk Marketing Board, Thames Ditton, Surrey KT7 0EL
J. P. Frappell
Affiliation:
Milk Marketing Board, Thames Ditton, Surrey KT7 0EL
Get access

Abstract

The 305-day lactation milk yields and the numbers of inseminations required to obtain a pregnancy during a particular lactation were obtained from 1475 lactations of 808 daughters of eight bulls, whose Improved Contemporary Comparisons spanned two genetic standard deviations of milk yield. All lactations were completed before September 1978. Cattle requiring more than one insemination for a pregnancy produced 173 (standard error of difference = 55) kg more milk in 305 days than those requiring only one. There was no correlation between the Improved Contemporary Comparisons of the sire and either the difference in yield, or the proportion of animals needing one or those needing more than one insemination per pregnancy.

Type
Research Article
Information
Animal Production , Volume 34 , Issue 2 , April 1982 , pp. 239 - 241
Copyright
Copyright © British Society of Animal Science 1982

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Burnside, E. B. and Stewart, H. M. 1978. Genetic, physiological, physical and economic differences among low and high producing dairy cows. Dairy Ind. Res. Rep., Univ. Guelph.Google Scholar
Kocsky, L. 1978. Relationship between milk yield and reproductive performance of cows in large herds. Allattenyésztes 27: 215–228.Google Scholar
Kragelund, K., Hillel, J. and Kalay, D. 1979. Genetic and phenotypic relationship between reproduction and milk production. J. Dairy Sci. 63: 468–474.CrossRefGoogle Scholar
Milk Marketing Board. 1979. The improved contemporary comparison. Rep. Breed. Prod. Orgn Milk Mktg Bd, No. 29, pp. 91–94.Google Scholar
Ostermann, J. 1977. Evaluation of recording in a large dairy herd with special reference to the relationship between milk yield and fertility. Thesis, Tierarztliche Hochsch., Hannover.Google Scholar
Traa, F. A. and Esslemont, R. J. 1977. Relationships between milk production and reproductive performance in the high yielding dairy cow. A review and a case study. Veterinary, Epidemiology and Economics Research Unit, University of Reading.Google Scholar
Wood, P. D. P. 1977. The effect of the dry period on the subsequent lactation in three half-sib groups of British Friesians. J. agric. Sci., Camb. 89: 737–741.CrossRefGoogle Scholar
Youdan, P. G. and King, J. O. L. 1977. The effects of body weight changes on fertility during the post-partum period in dairy cows. Br. vet. J. 133: 635–641.CrossRefGoogle ScholarPubMed