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CC BY-NC-ND V4.0, Open Access
Journal article
Intramuscular fat % in the loin of Australian pork demonstrates a stronger relationship with computed tomography lean and fat % than abattoir measures of P2 and lean
Journal of animal science, Vol.102, skae331
2024
PMID: 39468749
Abstract
Intramuscular fat (IMF) % is an important measure of pork eating quality, with reduced IMF % linked to the selection of pigs with low backfat P2 thickness and more muscular genotypes over several decades. This experiment tested the association of IMF % from the M. longissimus thoracis et lumborum of 345 pigs at 3 abattoirs (sites) with computed tomography (CT) determined carcass composition (% lean or fat), accredited abattoir measures of P2 backfat (mm; Hennessy Grading Probe [HGP], AutoFom III, and PorkScan Lite) and the lean % output from abattoir devices (HGP, AutoFom III, and PorkScan Plus). There was a negative relationship between carcass CT lean % with IMF % at all sites (P < 0.05), with the strength of this relationship varying between sites. The strongest relationship was demonstrated at site 1 (R2 0.30, RMSE 0.59), and across a 4 SD range in the carcass lean % at each site, resulted in a decrease in loin IMF % of 1.56, 0.44, and 0.80. There was a positive relationship of carcass CT fat % with IMF %, with similar, albeit slightly stronger relationship to IMF than with CT lean %. In contrast, only one of the 3 sites with an accredited P2 measurement device demonstrated a significant association (P < 0.05) with IMF %. This is the first time the associations of IMF % with carcass CT composition has been assessed alongside that of P2 backfat measurements from commercially deployed abattoir devices. Given P2 backfat is the key industry measure on which carcass value is determined in Australia, this experiment demonstrates the limitations that P2 has in measuring and monitoring the associations of carcass lean and fat % with IMF. Ideally, an independent measure of IMF % would allow for independent selection for lean % and IMF %; however, there is currently no commercial device that can measure pork IMF %.
Details
- Title
- Intramuscular fat % in the loin of Australian pork demonstrates a stronger relationship with computed tomography lean and fat % than abattoir measures of P2 and lean
- Authors/Creators
- Fiona Anderson - Murdoch UniversityMaddison T Corlett - Murdoch UniversityAndrew Williams - Murdoch UniversityGraham E Gardner - Murdoch University
- Publication Details
- Journal of animal science, Vol.102, skae331
- Publisher
- Oxford University Press on behalf of the American Society of Animal Science.
- Number of pages
- 9
- Grant note
- Murdoch University - Advanced Livestock Measurement TechnologiesAustralian Pork Limited: 2021/0037 Murdoch University
The authors are grateful for the support of the technical staff and resources at all collaborating processors, Frontmatec and Murdoch University. This project was funded by Advanced Livestock Measurement Technologies (ALMTech) and Australian Pork Limited (grant number 2021/0037). The authors are grateful for the support of the technical staff and resources at all collaborating processors, Frontmatec and Murdoch University.
- Identifiers
- 991005716570107891
- Copyright
- © The Author(s) 2024.
- Murdoch Affiliation
- Centre for Animal Production and Health; School of Agricultural Sciences
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.51 Dairy & Animal Sciences
- 3.51.206 Meat Quality
- Web Of Science research areas
- Agriculture, Dairy & Animal Science
- ESI research areas
- Plant & Animal Science