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A Note on inbreeding and genetic relationships among British tested pigs

Published online by Cambridge University Press:  02 September 2010

C. Smith ,
C. H. C. Jordan ,
D. E. Steane  and
M. B. Sweeney
C. Smith
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
C. H. C. Jordan
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
D. E. Steane
Affiliation:
Meat and Livestock Commission, PO Box 44, Queensway House, Bletchley, Milton Keynes MK2 2EF
M. B. Sweeney
Affiliation:
Meat and Livestock Commission, PO Box 44, Queensway House, Bletchley, Milton Keynes MK2 2EF
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Extract

Five samples from tested pig herds (Large White 1972, 1975, and 1976, British Landrace 1976 and Welsh 1976) were used to estimate the current rate of inbreeding in British pig testing herds. The annual rates of inbreeding (%) were estimated at 0·32, 0·19, 0·24, 0·33 and 0·34 respectively in the five samples. Overall average estimates of 0·49 to 0·52% per generation are similar to estimates from other pig populations reported in the literature. Coefficients of relationship within farms were calculated for various sib and non-sib groups and these were used to estimate the genetic contributions to the variance components in the analysis of variance of test records.

Type
Research Article
Information
Animal Production , Volume 27 , Issue 1 , August 1978 , pp. 125 - 128
Copyright
Copyright © British Society of Animal Science 1978

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References

REFERENCES

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