ESTIMATION OF GENETIC-PARAMETERS FOR CZEC H PIG BREEDS USING A MULTITRAIT ANIMAL-MODEL

Genetic parameters were estimated for the Czech pig breeds Large White (BU), Landrace (L), Czech Meat Pig (CVM) and Black Pied Prestice (PC) from data of the field test (1989-1995) and data of the station test (1991-1995). A four-trait animal model was calculated using the progra m VCE, version 3.2, and applying different models to different traits. The following heritabilities were estimated: lifetime average daily g ain in field test (ADGF) 0.11-0.14, average daily gain during test on station (ADGS) 0.22-0.32, lean meat content (LMF) measured in the fiel d test by PIGLOG 0.25-0.36, valuable cuts (VCS) measured on station te st 0.25-0.39. The genetic correlations between the appropriate traits form the field test and the station test are: ADGS-ADGF 0.28-0.56, LMF -VCS 0.60-0.82. The variance ratios for common litter environment were higher in the traits of daily gain (around 0.20) than in the traits r elated to lean meat contents (around 0.10). The variance ratio for her d was especially high for ADGF (0.30 and above).