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Association between visual marbling score and chemical intramuscular fat with camera marbling percentage in Australian beef carcasses

Stewart, S.M., Gardner, G.E.ORCID: 0000-0001-7499-9986, Williams, A., Pethick, D.W.ORCID: 0000-0002-3255-7677, McGilchrist, P. and Kuchida, K. (2020) Association between visual marbling score and chemical intramuscular fat with camera marbling percentage in Australian beef carcasses. Meat Science, In Press . Article 108369.

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Embargoed until October 2021.

Link to Published Version: https://doi.org/10.1016/j.meatsci.2020.108369
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Abstract

This study assessed the precision and accuracy in the prediction of chemical intramuscular fat (IMF%), Meat Standards Australia (MSA) marbling score and AUS-MEAT eye-muscle area (EMA) using Meat Imaging Japan (MIJ) prototype camera systems. Eleven carcass datasets from the Beef Information Nucleus (BIN) project were compiled with carcass grading, IMF% and camera data. Camera prediction of IMF%, MSA marbling score and EMA was assessed using a leave-one-out cross validation method. There was an association between MIJ mirror and MIJ-30 camera traits and IMF%, MSA marbling score and EMA. However, for both prototypes precision varied for IMF% (R2 = 0.4–0.5, RMSECV = 1.5–1.6%), MSA marbling (R2 = 0.3–0.5, RMSECV = 57.5–59.3) and EMA (R2 = 0.7–0.6, RMSECV = 4.1–5.8 cm2). Accuracy also fluctuated with average bias values of 1.7–1.8%, 45.8–40.0 units and 3.8–4.1 cm2 for IMF%, MSA marbling score and EMA respectively. Key differences between carcass and camera traits and processing factors affecting the grading site are likely to have contributed to this variation.

Item Type: Journal Article
Murdoch Affiliation(s): School of Veterinary and Life Sciences
Publisher: Elsevier BV
Copyright: © 2020 Elsevier Ltd
URI: http://researchrepository.murdoch.edu.au/id/eprint/58834
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