1. Marian Smoluchowski Institute of Physics, Jagiellonian University, S. Łojasiewicza 11, 30-348 Krakow, Poland
2. Department of Animal Anatomy, Agricultural University of Krakow, Al. Mickiewicza 24/28, 30-059 Krakow, Poland
3. Department of Animal Genetic and Breeding, National Research Institute of Animal Production, 32-083 Balice, Poland