Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-26T19:59:03.488Z Has data issue: false hasContentIssue false

The effects of inbreeding on carcass traits in the bacon pig

Published online by Cambridge University Press:  01 September 1959

J. W. B. King
Affiliation:
A.R.C. Animal Breeding Research Organisation, Edinburgh, 9
R. C. Roberts
Affiliation:
A.R.C. Animal Breeding Research Organisation, Edinburgh, 9
Get access

Extract

Carcass measurements made on 1,463 Large White pigs from 88 inbred lines, at various degrees of inbreeding, have been analysed.

Partial regression coefficients calculated within lines showed that each 10% increase in inbreeding coefficient significantly increased carcass weight by 0·46 lb., decreased mid-back fat thickness by 0·37 mm. and streak thickness by 0·36 mm.

Partial regression coefficients calculated on all the material, or on line means showed, however, that the most highly inbred pigs tended to be shorter and fatter than average. Possible explanations of this finding are discussed and it is suggested that under the selection procedure adopted for litter size and weaning, weight favours the survival of these less desirable lines.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1959

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

Craft, W. A., 1935. Type changes in an inbred stock of swine. Proc. Amer. Soc. Anim. Prod., 27th Ann. Meet. 1934: 110.Google Scholar
De Pape, J. G., & Whatley, J. A. (Jr.), 1956. Live hog probes at various sites, weights, and ages as indicators of carcass merit. J. Anim. Set., 15: 1029.CrossRefGoogle Scholar
Dickerson, G. E., 1947. Composition of hog carcasses as influenced by heritable differences in rate and economy of gain. Res. Bull. la. agric. Exp. Sta., No. 354: 489.Google Scholar
Dickerson, G. E., Lush, J. L., & Culbertson, C. C, 1946. Hybrid vigor in single crosses between inbred lines of Poland China swine. J. Anim. Sci., 5: 16.CrossRefGoogle Scholar
Gregory, K. E., & Dickerson, G. E., 1952. Influence of heterosis and plane of nutrition on rate and economy of gains, digestion and carcass composition of pigs. Res. Bull. Mo. agric. Exp. Sta., No. 493.Google Scholar
Hetzer, H. O., Hankins, O. G., & Zeller, J. H., 1951. Performance of crosses between six inbred lines of swine. Circ. U.S. Dep. Agric., No. 893.Google Scholar
Kino, J. W. B., 1957. The heritability of carcass traits in British bacon pigs. Proc. Brit. Soc. Anim. Prod., 1957: 49.Google Scholar
Odriozola, M., 1945. Estudios en el cebadero de Porrino. Estudio primero: alrededor de una piara cerrada. Bol. Inst. Invest, agron. (Madr.), No. 12: 9.Google Scholar
Winters, L. M., Dailey, D. L., Jordan, P. S., Kiser, O. M., Hodgson, R. E., Cummings, J. N., & Sierk, C. F., 1948. Experiments with inbreeding swine. Bull. Minn, agric. Exp. Sta., No. 400.Google Scholar