| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
* Department of Animal Sciences, University of Illinois, Urbana 61801 and
and
Pig Improvement Company, Franklin, KY 42134
1 Correspondence: 216 Animal Sciences Laboratory, 1207 W. Gregory Dr. (phone: 217-333-6455; fax: 217-333-7861; E-mail: mellis7{at}uiuc.edu).
The relationships between glycolytic potential and growth performance, carcass traits, and pork quality were investigated in a group of 72 pigs from the same genetic line. Glycolytic potential (GP) was determined on live-animal biopsy samples and postmortem samples taken from the longissimus muscle, and free glucose concentration was measured on the exudate from the longissimus muscle taken postmortem. The mean live-animal and postmortem GP and free glucose values were 201.6 µmol/g (range = 113.8 to 301.1), 149.8 µmol/g (range = 91.0 to 270.5) and 110.1 mg/dL (range = 30.0 to 406.0), respectively. Correlations between live-animal and postmortem GP and free glucose ranged from 0.47 to 0.70; however, all three measures were weakly related to growth and carcass traits (r = 0.03 to -0.22; P > 0.05). Correlations of GP and free glucose values with fresh pork quality measurements were moderate (r = 0.23 [P < 0.05] to -0.63 [P < 0.001]). Regression analysis suggested that a one standard deviation increase in live-animal and postmortem GP and free glucose resulted in an increase in L* values (0.99, 1.32, and 2.05, respectively) and drip loss (0.85, 1.10, and 1.39 percentage units, respectively), as well as a decrease in ultimate pH (0.05, 0.11, and 0.16, respectively). Correlations between GP and cooking loss and tenderness and juiciness scores ranged between 0.16 (P > 0.05) to 0.34 (P < 0.01). Free glucose concentration showed no relationship (P > 0.05) with cooking loss, tenderness, and juiciness. Regression analysis suggested that a one standard deviation increase in live-animal and postmortem GP increased cooking loss (1.26% and 1.65%, respectively) and would improve taste panel tenderness (0.54 and 0.44, respectively) and juiciness (0.40 and 0.48, respectively) scores. Increasing GP and free glucose was also associated with decreased longissimus fat and protein, and increased moisture contents (r = 0.14 [P > 0.05] to -0.45 [P < 0.001]). Overall, relationships with fresh meat quality characteristics were stronger for free glucose values than either live-animal or postmortem GP. Results from this study indicate that decreasing longissimus GP and free glucose concentrations may improve pork color and water-holding capacity.
Key Words: Glucose • Glycogen • Meat Quality • Pork
This article has been cited by other articles:
|
|
 |
|
  C. R. Schwab, T. J. Baas, K. J. Stalder, and J. W. Mabry Effect of long-term selection for increased leanness on meat and eating quality traits in Duroc swine J Anim Sci, June 1, 2006; 84(6): 1577 - 1583. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. C. Carr, J. B. Morgan, E. P. Berg, S. D. Carter, and F. K. Ray Growth performance, carcass composition, quality, and enhancement treatment of fresh pork identified through deoxyribonucleic acid marker-assisted selection for the Rendement Napole gene J Anim Sci, April 1, 2006; 84(4): 910 - 917. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
F. Gondret, L. Lefaucheur, H. Juin, I. Louveau, and B. Lebret Low birth weight is associated with enlarged muscle fiber area and impaired meat tenderness of the longissimus muscle in pigs J Anim Sci, January 1, 2006; 84(1): 93 - 103. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. M. Stearns, J. E. Beever, B. R. Southey, M. Ellis, F. K. McKeith, and S. L. Rodriguez-Zas Evaluation of approaches to detect quantitative trait loci for growth, carcass, and meat quality on swine chromosomes 2, 6, 13, and 18. II. Multivariate and principal component analyses J Anim Sci, November 1, 2005; 83(11): 2471 - 2481. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. M. Stearns, J. E. Beever, B. R. Southey, M. Ellis, F. K. McKeith, and S. L. Rodriguez-Zas Evaluation of approaches to detect quantitative trait loci for growth, carcass, and meat quality on swine chromosomes 2, 6, 13, and 18. I. Univariate outbred F2 and sib-pair analyses J Anim Sci, July 1, 2005; 83(7): 1481 - 1493. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
