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Prediction of carcass lean content by real-time ultrasound in Pietrain and negative stress Pietrain

Published online by Cambridge University Press:  18 August 2016

I.A.K. Youssao ,
V. Verleyen  and
P.L. Leroy
V. Verleyen
Affiliation:
University of Liege, Faculty of Veterinary Medicine, Biostatistics and Animal Selection, 20 Bd de Colonster, B 43, 4000 Liege, Belgium
P.L. Leroy
Affiliation:
University of Liege, Faculty of Veterinary Medicine, Biostatistics and Animal Selection, 20 Bd de Colonster, B 43, 4000 Liege, Belgium
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Abstract

Real-time ultrasound data of backfat thickness, longissimus muscle depth and longissimus area were carried out on 335 pigs (164 gilts and 171 barrows) using the Pie Medical Scanner 200 equipped with an ASP-18 probe and 3·5 MHz to predict carcass lean content in positive stress Pietrain (TT) and negative stress Pietrain (CC or CT). They were given food ad libitum and slaughtered at an average age of 213 days and an average weight of 101 kg. The day before slaughter, longitudinal and transverse images were taken at the last rib. After slaughter, the lean meat content was estimated by a CGM (capteur gras-maigre) equipped with an 8-mm diameter Sydel probe. The carcass lean proportion was higher in homozygote TT than homozygote CC and heterozygote CT individuals (P < 0·05). Gilts had more lean meat than barrows (P < 0·05). The correlation between the lean meat proportion and ultrasound backfat thickness (UBFT) or ultrasound longissimus muscle depth (ULMD) respectively was moderate. The prediction of lean meat proportion using UBFT, ULMD and ULMA gave an R2 which varied from 0·35 to 0·79. Real-time ultrasound is a tool that could potentially be used to predict the composition of pig carcasses before slaughter particularly if measurements can be taken with a higher degree of accuracy than at present.

Keywords

Pietrainhalothaneultrasoundlongissimusbackfatlean content
Type
Research Article
Information
Animal Science , Volume 75 , Issue 1 , August 2002 , pp. 25 - 32
Copyright
Copyright © British Society of Animal Science 2002

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