J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J. Anim Sci. 1978. 46:992-1000.
© 1978 American Society of Animal Science
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Davey, R. J.
Right arrow Articles by Bereskin, B.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Davey, R. J.
Right arrow Articles by Bereskin, B.

Genetic and Nutritional Effects on Carcass Chemical Composition and Organ Weights of Market Swine

R. J. Davey and B. Bereskin1 ,2,

U.S. Department of Agriculture, Beltsville, MD 20705

Abstract

Half-carcasses of 128 market swine were analyzed for moisture, ether extract (EE), protein and ash. The longissimus muscles were analyzed for EE and some organ weights were measured. A balanced 25 of treatments included shire (Y) breeds, high (H) and low (L) backfat lines within each breed, sex (female and castrated male) and two levels each of dietary protein (20 and 14%) and energy (3.6 and 3.2 kcal ME/g). Each of the breed-line groups differed significantly from each other in carcass chemical composition ranging from the highest protein and lowest EE in YL through DL, YH to DH which had the lowest protein and highest EE. Males were significantly lower in protein and higher in EE than females. A breed-line x sex interaction (P<.01) for all components except ash showed that the greatest difference between sexes was in the L lines. Carcasses from pigs fed the 20% protein diet were higher in moisture and lower in EE (P<.05) than those of pigs fed the 14% diet. No other diet effects and no interaction of diet with breed-line variables were significant. The EE of the longissimus muscle was significantly lower in YL and higher in DH than in the other breed-line groups and higher (P<.01) in males than in females. Differences in organ weights (liver, heart, kidney, stomach) among the breed-line groups were significant and the liver and kidneys of pigs fed the 20% protein diet were heavier (P<.01) than those from pigs fed the 14% diet.

Footnotes

1 Nonruminant Animal Nutrition Laboratory, trition Institute, A.R.S.

2 The authors wish to acknowledge the technical assistance of J. Faltynski and J. Phelps.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1978 by the American Society of Animal Science.