Vision Versus Reflectance Technology for Deviations for Sex and Halothane Genotype in Pig Carcass Classification

G. Daumas; M. Monziols; D. Causeur

Vision Versus Reflectance Technology for Deviations for Sex and Halothane Genotype in Pig Carcass Classification

In: 63rd International Congress of Meat Science and Technology

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G. Daumas

G. Daumas ¹IFIP-Institut du Porc, BP 35104, 35601 Le Rheu Cedex, France

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M. Monziols

M. Monziols ¹IFIP-Institut du Porc, BP 35104, 35601 Le Rheu Cedex, France

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, and

D. Causeur

D. Causeur ²Agrocampus Ouest, Irmar, UMR 6625 CNRS, 65 rue de St-Brieuc, CS 84215, 35042 Rennes Cedex, France; gerard.daumas@ifip.asso.fr

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Type:: Chapter

Pages:: 50–51

DOI:: https://doi.org/10.3920/9789086868605_010

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This work aims to compare the systematic deviations for sex and halothane genotype subpopulations between pig classification methods by automatic vision and semi-automatic reflectance. A sample of 209 carcasses, stratified according to sex (50% castrated males and 50% females), was measured by CSB Image-Meater^® (IM) and CGM. An ear sample was analysed for halothane gene (Hal). The left sides were cut according to the EU procedure and the four main cuts were weighed and scanned by X-ray tomography in order to determine lean meat percentage (LMP). For each device the LMP was regressed on the fat and muscle depths included in the official equations. For each equation were calculated the systematic deviations per level of the sex and Hal factors by mean difference between predicted and observed values. The LMP overestimation for castrated males increased from 0.4% with CGM to 0.7% with IM. The LMP overestimation for non-sensitive homozygotes Hal, not significant with CGM, rose to 0.5%. Systematic deviations for sexual types could be cancelled at least by a differentiated offset in the prediction equations.

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

E-Book ISBN:: 9789086868605

Publisher:: Wageningen Academic

Print Publication Date:: 15 Nov 2017

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- Life Sciences

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Vision Versus Reflectance Technology for Deviations for Sex and Halothane Genotype in Pig Carcass Classification

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

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