Hostname: page-component-7bb8b95d7b-495rp Total loading time: 0 Render date: 2024-09-12T15:18:48.069Z Has data issue: false hasContentIssue false
  • English
  • Français

The value of cloning in MOET nucleus breeding schemes for dairy cattle

Published online by Cambridge University Press:  02 September 2010

J. A. Woolliams
J. A. Woolliams
Affiliation:
AFRC Institute of Animal Physiology and Genetics Research, Edinburgh Research Station, Roslin, Midlothian EH25 9PS
Get access

Abstract

The value of cloning in MOET nucleus breeding schemes has to be considered within the constraint of fixed resources. Under this constraint cloning was found to add to genetic progress only when (i) the heritability is low and (ii) it is used at the expense of a reduction in the number of bull families. This course would exacerbate inbreeding and other potential problems with MOET. All other options for using clones lead to a reduction in genetic progress due to a loss of selection intensity that is not made up for by gains in selection accuracy.

Type
Research Article
Information
Animal Production , Volume 48 , Issue 1 , February 1989 , pp. 31 - 35
Copyright
Copyright © British Society of Animal Science 1989

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

Becker, W. A. 1975. Manual of Quantitative Genetics. 3rd ed. Washington State University, Pullman, Washington.Google Scholar
Hill, W. G. 1976. Order statistics of correlated variables and implications in genetic selection programmes. Biometrics 32: 889–902.CrossRefGoogle ScholarPubMed
Nicholas, F. W., and Smith, C. 1983. Increased rates of genetic change in dairy cattle by embryo transfer and splitting. Animal Production 36: 341–353.Google Scholar
Rawlings, J. O. 1976. Order statistics for a special class of unequally correlated multinomial variates. Biometrics 32: 875–887.CrossRefGoogle Scholar
Willadsen, S. M. 1979. A method for culture of micromanipulated sheep embryos and its use to produce monozygotic twins. Nature, London 277: 298–300.CrossRefGoogle ScholarPubMed
Woolliams, J. A. and Smith, C. 1988. The value of indicator traits in the genetic improvement of dairy cattle. Animal Production 46: 333–345.CrossRefGoogle Scholar