Prediction of lean content in breeding pigs by in vivo and post mortem methods
2002
Vaclavovsky, J. | Matousek, V. | Kernerova, N. | Kouglova, P. | Nydl, V. (Jihoceska Univ., Ceske Budejovice (Czech Republic). Zemedelska Fakulta) | Novotny, F.
The objective of the paper was to evaluate lean content measured with PIGLOG-105 (PI-105) and SONOMARK 100 (SM-100) instruments applying current methodology for determination of breeding pig performance in vivo and by post mortem two-point (ZP) method and/or FOM probing method in half-carcasses. Data were acquired at a pig testing station during progeny tests of pure pig breeds of base populations of n=111 animals. Pigs were measured at live weight of 98-105 kg. After slaughter the same measures were determined with slide gauge at identical points of measurement. They were used for a regression equation in FOM instrument and measures necessary to calculate lean content by ZP method were found out at the same time. Average backfat thickness t1 (t2) was 13.0 mm (11.6 mm), depth of m.l.l.t. muscle 53 mm and lean content 59.1 %. Minimum differences (between the used methods) were observed in backfat thickness t2, but statistically highly significant differences were found in muscle depth. High goodness of fit existed for lean content between the results presented by PI-105 instruments and FOM method (R2=0.63). The coincidence between the results of SM-100 and both post-mortem methods was satisfactory.
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