Comparative investigations about the application of ultrasound measurement(PIGLOG) for prediction of the lean meat content in gilts

Ultrasound based systems for in vivo estimation of lean meat content were c omparatively investigated in 100 gilts (German Landrace, German Large White , Leicoma and F-1). Rank correlations increased between ultrasound based es timations of lean meat and carcass classification with growing age and live weight, respectively. Lean meat content was estimated with the PIGLOG syst em and the B-mode device with repeatabilites of R-2=0.40 and R-2=0.63, resp ectively. We can not recommend the use of PIGLOG derived estimates of lean meat content in selection of gilts without prior correction of the calculat ion algorithm in the investigated populations. Our investigations furthermo re demonstrated the importance of sufficient training of the persons conduc ting the measurements.