Skip to main content Accessibility help
×
Home

A Note on inbreeding and genetic relationships among British tested pigs

  • C. Smith (a1), C. H. C. Jordan (a1), D. E. Steane (a2) and M. B. Sweeney (a2)

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.

Copyright

References

Hide All
Dickerson, G. E. 1942. Experimental design for testing inbred lines of swine. J. Anim. Sci. 1: 326341.
Falconer, D. S. 1960. Introduction to Quantitative Genetics. Oliver and Boyd, Edinburgh.
Lush, J. L. and Anderson, A. L. 1939a. A genetic history of Poland-China swine. I. Early breed history: the ‘hot blood’ versus the ‘big type’. J. Hered. 30: 149156.
Lush, J. L. and Anderson, A. L. 1939b. A genetic history of Poland-China swine. II. ‘Founders of the breed’, prominent individuals, length of generation. J. Hered. 30: 219224.
Jonsson, P. 1971. Population parameter estimates of the Danish Landrace pig. Ada Agric scand. 21: 1116.
Smith, C., King, J. W. B. and Gilbert, N. 1962. Genetic parameters of British Large White bacon pigs. Anim. Prod. 4:128143.
Smith, C. and Ross, G. J. S. 1965. Genetic parameters of British Landrace bacon pigs. Anim. Prod. 7: 291301.

A Note on inbreeding and genetic relationships among British tested pigs

  • C. Smith (a1), C. H. C. Jordan (a1), D. E. Steane (a2) and M. B. Sweeney (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.