Objective grading of eye muscle area, intramuscular fat and marbling in Australian beef and lamb

Stewart, S.M., Lauridsen, T., Toft, H., Pethick, D.W.ORCID: 0000-0002-3255-7677, Gardner, G.E.ORCID: 0000-0001-7499-9986, McGilchrist, P. and Christensen, M. (2020) Objective grading of eye muscle area, intramuscular fat and marbling in Australian beef and lamb. Meat Science, In Press . Article 108358.

Abstract

The objective of this study was to test the performance of a prototype vision system in phenotypically diverse beef and lamb carcasses against visual grading of eye muscle area (EMA), marbling and chemical intramuscular fat (IMF%). Validation in beef demonstrated that the camera prototype in combination with analytical techniques enabled prediction of EMA (r2 = 0.83, RMSEP = 6.4 cm2), MSA marbling (r2 = 0.76, RMSEP = 66.1), AUS-MEAT marbling (r2 = 0.70, RMSEP = 0.74) and chemical IMF% (r2 = 0.78, RMSEP = 1.85%). Accuracy was also maintained on validation with all four traits displaying minimal bias of −3.6, 6.3, 0.07 and − 0.01, for EMA, MSA marbling, AUS-MEAT marbling and IMF% respectively. Preliminary analysis in lamb indicates potential of the system for the prediction of EMA (r2 = 0.41, RMSEP = 1.87) and IMF% (r2 = 0.28, RMSEP = 1.10), however further work to standardise image acquisition and environmental conditions is required.

Item Type:	Journal Article
Murdoch Affiliation(s):	Agricultural Sciences Food Futures Institute
Publisher:	Elsevier BV
Copyright:	© 2020 Elsevier Ltd
URI:	http://researchrepository.murdoch.edu.au/id/eprint/58714

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