1. Department of Biological Basis of Animal Production, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland
2. Laboratory of Genomics, National Research Institute of Animal Production, 32-083 Balice n. Kraków, Poland
3. Department of Genetics, University of Rzeszów, Rejtana 16 C, 35-959 Rzeszów, Poland