Bone mineral concentration predicted by dual energy X-ray absorptiometry and its relationship with lamb eating quality

Payne, C.E., Anderson, F., Pannier, L., Pethick, D.W.ORCID: 0000-0002-3255-7677 and Gardner, G.E.ORCID: 0000-0001-7499-9986 (2022) Bone mineral concentration predicted by dual energy X-ray absorptiometry and its relationship with lamb eating quality. Meat Science, 186 . Art. 108725.

Abstract

Lumbar bone mineral concentration, as predicted by dual energy x-ray absorptiometry (DEXA), may reflect changes in lamb maturity and eating quality. New season (n = 60) and old season (n = 60) lambs were slaughtered and DEXA scanned at a commercial abattoir across 2 kill groups. The second lumbar vertebra was isolated from the spine for determination of calcium, phosphorus, and magnesium concentration (mg/g). The loin and rack cuts were collected for consumer sensory grilling and roasting analyses. Mineral concentration was significantly higher in old season lambs within kill group 1 (P < 0.05). DEXA was a positive predictor of phosphorus and calcium concentration, but only when DEXA lean % (P < 0.05) was included in the model. Calcium and phosphorus were significant positive predictors of overall liking scores (P < 0.05), but only for the rack roast. These effects became insignificant when DEXA lean % was included. These results suggest that DEXA values likely reflect changes in both DEXA lean % and bone minerals, and that DEXA lean % was the driver of eating quality, rather than maturity.

Item Type:	Journal Article
Murdoch Affiliation(s):	Agricultural Sciences Food Futures Institute
Publisher:	Elsevier BV
Copyright:	© 2021 Published by Elsevier Ltd.
URI:	http://researchrepository.murdoch.edu.au/id/eprint/63692

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