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During the last two decades the BLUP breeding value estimation became a wide-spread procedure in every animal breeding sector. The Hungarian pig breeding sector was no exception and after an extremely long transition period (more than 10 years) the BLUP procedure became official in 2009 (MGSZH, 2009). Since then the genetic merit of the Hungarian pig populations are obtained by means of BLUP evaluations that are based on the various performance test data (field and station tests). Generally the BLUP procedure was developed for purebred animals. An overview about the application of BLUP in the various breeding programs and about the various BLUP models was given by Komlósi (1999) and Szőke and Komlósi (2000). However applying crossing is one of the main characteristics of the pig breeding sector. In order to evaluate crossbreds one possibility is to use pooled datasets and pedigrees of all genotypes participating in a given cross. Although the genetic parameters of the Hungarian purebred pig populations were reported by several studies (Csató et al., 2002; Csató et al., 2004; Farkas, 2008; Nagy et al., 2009) no relevant literature is available about the genetic parameters of crossbreds or about the estimated genotype effects describing the efficiency of the different crosses. These were the objectives of this study. MATERIALS AND METHODS

Estimation of genetic parameters and genotype effects for crossing constructions of Hungarian Pigs