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Derivation of improvement lags in a livestock industry

Published online by Cambridge University Press:  02 September 2010

D. R. Guy  and
C. Smith
D. R. Guy
Affiliation:
Meat and Livestock Commission, PO Box 44, Queensway House, Bletchley, Milton Keynes MK2 2EF
C. Smith
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
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Abstract

A simple and general procedure for calculating the equilibrium improvement lag in a livestock dissemination system is presented. The lag is conveniently measured in terms of the number of years of genetic change that it represents, and depends on the age and on the genetic superiority of the parents used in each step of the dissemination system. The total lag is the sum of the lags in all steps, weighting each step by the proportion of genes going through it.

Type
Research Article
Information
Animal Production , Volume 32 , Issue 3 , June 1981 , pp. 333 - 336
Copyright
Copyright © British Society of Animal Science 1981

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References

REFERENCES

Bichard, M. 1971. Dissemination of genetic improvement through a livestock industry. Anim. Prod. 13: 401–411.Google Scholar
Hill, W. G. 1974. Prediction and evaluation of response to selection with overlapping generations. Anim. Prod. 18: 117–139.Google Scholar