1. Uniwersytet Przyrodniczy we Wroclawiu, 56641, Deoartment of Genetics, Kożuchowska 7, Wroclaw, Poland, 51-631;
2. Wroclaw University of Environmenatl and Life Sciences, Department of Genetics, Kozuchowska 7, Wroclaw, Poland, 51-631;
3. Wroclaw University of Environmenatl and Life Sciences, Department of Genetics, Kożuchowska 7, Wroclaw, Poland, 51-631;
4. Wroclaw University of Environmental and Life Sciences, Institute of Animal Breeding, Kożuchowska 5a, Wroclaw, Poland, 51-631;