Genetic and environmental effects on the muscle structure response post-mortem

Title
Genetic and environmental effects on the muscle structure response post-mortem
Publication Date
2006
Author(s)
Thompson, John Mitchell
Perry, Diana
Daly, Briana Louise
Gardner, G E
Johnston, David
( author )
OrcID: https://orcid.org/0000-0002-4995-8311
Email: djohnsto@une.edu.au
UNE Id une-id:djohnsto
Pethick, D W
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Elsevier BV
Place of publication
Netherlands
DOI
10.1016/j.meatsci.2006.04.022
UNE publication id
une:3205
Abstract
This paper reviewed the mechanisms by which glycolytic rate and pre-rigor stretching of muscle impact on meat quality. If muscle is free to shorten during the rigor process extremes in glycolytic rate can impact negatively on meat quality by inducing either cold or rigor shortening. Factors that contribute to variation in glycolytic rate include the glycogen concentration at slaughter and fibre type of the muscle. Glycolysis is highly sensitive to temperature, which is an important factor in heavy grain fed carcasses. An alternative solution to controlling glycolysis is to stretch the muscle pre-rigor so that it cannot shorten, thus providing an insurance against extremes in processing conditions. Results are presented which show a large reduction in variance (both additive and phenotypic) in tenderness caused by pre-rigor stretching. Whilst this did not impact on the heritability of shear force, it did reduce genotype differences. The implications of these results on the magnitude of genotype effects on tenderness is discussed.
Link
Citation
Meat Science, 74(1), p. 59-65
ISSN
1873-4138
0309-1740
Start page
59
End page
65

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