Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-23T02:29:01.024Z Has data issue: false hasContentIssue false
  • English
  • Français

Principal components of profitability in heavy pig carcasses

Published online by Cambridge University Press:  27 March 2009

J. R. Morton
J. R. Morton
Affiliation:
Department of Applied Biology, University of Cambridge
Get access Rights & Permissions [Opens in a new window]

Summary

Data from between 742 and 894 carcasses of hogs and of gilts of a British Landrace line of pigs selected for lean percentage were subjected to a heritability and genetic correlation analysis and to a multivariate regression analysis of phenotypic correlations.

Although overall fatness was the most important component of carcass profitability, other components relating to carcass conformation and muscle to bone ratio remained important, particularly in gilts.

Genetic correlation of backfat thickness with carcass value was low in hogs (–0·39) and exceedingly so in gilts (–0·13). Although genetic correlations of lean percentage with carcass value were high (0·80 in hogs, 0·77 in gilts) they were no larger than those relating yield of trimmed and boned joints to carcass value, which varied between 0·70 and 0·79.

It is concluded that, with skilled butchers, joint yields as a selection criterion for carcass value are preferable to backfat thickness and as efficient as, and cheaper than, dissection.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 99 , Issue 3 , December 1982 , pp. 489 - 498
Copyright
Copyright © Cambridge University Press 1982

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

Cuthbertson, A. & Pease, A. H. R. (1968). The interrelationship of various measurements, visual assessments and dissection results of pigs of 200 lb live weight. Animal Production 10, 249–255.Google Scholar
Edwards, R. L., Smith, G. C., Cross, H. R. & Carpenter, Z. L. (1980). Muscle to bone ratios in pork carcasses. Journal of Animal Science 51, 1321–1329.CrossRefGoogle Scholar
Fowler, V. R., Bichard, M. & Pease, A. (1976). Objectives in pig breeding. Animal Production 23, 365–387.Google Scholar
Fredeen, H. T. (1972). Factors influencing genetic gain. In Pig Production (ed. Cole, D. J. A.), pp. 3–19. London: Butterworths.Google Scholar
Fredeen, H. T., Berg, R. T.Bowland, J. P. & Doornenball, H. (1964). Prediction of yield and value of hog carcasses. Canadian Journal of Animal Science 44, 334–346.CrossRefGoogle Scholar
Fredeen, J. T. & Jonsson, P. (1957). Genetic variance and covariance in Danish Landrace swine as evaluated under a system of individual feeding of progeny test groups. Zeitschrift für Tierzunchtskunde und Zuchtbiologie 70, 348–363.Google Scholar
Kauffman, R. G., Grummer, R. H., Smith, R. E., Long, R. A. & Shook, G. (1973). Does live-animal and carcass shape influence gross composition? Journal of Animal Science 37, 1112–1119.CrossRefGoogle Scholar
King, S. C. & Henderson, C. R. (1954). Variance components analysis in heritability studies. Poultry Science 33, 147–154.CrossRefGoogle Scholar
Martin, A. H., Sather, A. P., Fredeen, H. T. & Jolly, R. W. (1980). Alternative market weights for swine. II. Carcass composition and meat quality. Journal of Animal Science 50, 699–705.CrossRefGoogle Scholar
Neely, J. D., Johnson, R. K. & Walters, L. E. (1979). Efficiency of gains and carcass characteristics of swine of two degrees of fatness slaughtered at three weights. Journal of Animal Science 48, 1049–1056.CrossRefGoogle Scholar
Ollivier, L. & Derrien, A. (1981), Une méthode générate, d'estimation des paramétres génétiques dans un échantillon sélectionné, avec une application à une sélection sur un indice à trois charactères. Annales de Génétique et Sélection Animate 13, 281–292.CrossRefGoogle Scholar
Owen, J. B. & Morton, J. R. (1969). The association of food conversion ratio, age at slaughter and carcass quality in pigs fed ad libitum. Animal Production 11, 317–324.Google Scholar
Quenouille, M. H. (1960). Introductory Statistics, pp. xii and 248. London: Butterworth–Springer.Google Scholar
Smith, C. (1965). Results of progeny testing in Great Britain. Animal Production 7, 133–140.Google Scholar
Smith, C., King, J. W. B. & Gilbert, N. (1962). Genetic parameters of British Large White bacon pigs. Animal Production 4, 128–143.Google Scholar
Smith, C. & Ross, G. J. S. (1965). Genetic parameters of British Landrace bacon pigs. Animal Production 7, 291–302.Google Scholar
Tallis, G. M. (1959). Sampling errors of genetic correlation coefficients calculated from analysis of variance and covariance. Australian Journal of Statistics 1, 35–45.CrossRefGoogle Scholar
Wyllie, D., Morton, J. R. & Owen, J. B. (1979). Genetic aspects of voluntary food intake in the pig and their association with gain and food conversion efficiency. Animal Production 28, 381–390.Google Scholar