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Muscle metabolism in relation to genotypic and environmental influences on consumer defined quality of red meat

Pethick, D.W.ORCID: 0000-0002-3255-7677, Fergusson, D.M., Gardner, G.E.ORCID: 0000-0001-7499-9986, Hocquette, J.F., Thompson, J.M. and Warner, R. (2005) Muscle metabolism in relation to genotypic and environmental influences on consumer defined quality of red meat. In: Hocquette, J.F. and Gigli, S., (eds.) Indicators of milk and beef quality. Wageningen Academic Publishers, Wageningen, Netherlands, pp. 95-110.

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This paper discusses the management of consumer defined beef palatability using a carcass grading scheme which utilizes the concept of total quality management. The scheme called Meat Standards Australia (MSA) has identified the Critical Control Points (CCPs) from the production, pre-slaughter, processing and value adding sectors of the beef supply chain and quantified their relative importance using large-scale consumer testing. These CCPs have been used to manage beef palatability in two ways. Firstly, CCPs from the pie-slaughter and processing sectors have been used as mandatory criteria for carcasses to be graded. Secondly, other CCPs from the production and processing sectors have been incorporated into a model to predict palatability for individual muscles. The CCPs from the production (breed, ossification and implants of hormonal growth promotants), pre-slaughter and processing (pH/temperature window, alterative carcass suspension, marbling and ageing) sectors are reviewed. The paper then discusses the interacting roles of nutrition and genotype as determinants of muscle energy pattern with respect to glycogen and fat metabolism. In particular the roles of fibre type and/or pattern of muscle energy metabolism is discussed in relation to the high ultimate p11 syndrome (dark cutting beef), the rate of post mortem glycolysis and the response to electrical stimulation. Finally the development of intramuscular fat is discussed in terms of growth and development, biochemical regulation and nutritional modification.

Item Type: Book Chapter
Murdoch Affiliation(s): School of Veterinary and Biomedical Sciences
Publisher: Wageningen Academic Publishers
Copyright: © Wageningen Academic Publishers 2005
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