Ultrasound measurement of MLTL area and backfat thickness as method of in vivo assessment of cattle beef production diversity | Sonografické meranie plochy MLTL a hrúbky podkožného tuku ako metóda in vivo hodnotenia diverzity mäsovej úžitkovosti hovädzieho dobytka
2010
Polák. P., Centrum výskumu živočíšnej výroby, Nitra (Slovak Republic) | Tomka, J. | Bartoň, L., Výskumný ústav živočišné výroby, Praha Uhřínevěs | Bureš, D. | Krupa, E. | Oravcová, M. | Huba, J.
The aim of the research was to analyze the possibility of in vivo measurement of muscle area and fat thickness by ultrasound to assesse the diversity of cattle beef production. The back of 54 young bulls (the purebred Czech Fleckvieh, Polled Simmental, and crosses of the Czech Fleckvieh, Charolais, and Piedmont) was sonographically scanned. Musculus longissimus thoracis et lumborum (MLTL) area and fat layer were measured on 8th (AREA8, FAT8) and 12th (AREA12, FAT12) thoracic vertebra. The correlation coefficients between selected carcass quality variables (weight of hot carcass - WHC, weight of meat in carcass - WMC, and weight of valuable cuts in carcass - WVCC) and muscle areas were higher for the AREA8 than the AREA12 vertebra (0.56-0.63 against 0.55-0.58). FAT8 and FAT12 showed low negative correlations with selected carcass quality characteristics (from -0.18 to -0.04 for FAT8 against -0.20 to -0.09 for FAT12). The muscle areas showed significant correlation also with the quality grades acoording the carcass conformation 0.33 for AREA8 and 0.30 for AREA12. Sonographically obtained measurements (AREA8 and FAT8) showed tendency to become characteristic for in vivo assessment of cattle beef production phenotypic diversity. Further research is needed to proof this tendency in traditionally produced local breeds.
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