1. Department of Genetics and Agricultural Biotechnology, Faculty of Agriculture, University of SouthBohemia in České Budějovice, Studentská 1668, 370 05 České Budějovice, Czech Republic
2. Department of Food Biotechnologies and Agricultural Products Quality, Faculty of Agriculture, University of South Bohemia in České Budějovice, Studentská 1668, 370 05 České Budějovice, Czech Republic
3. Institute of Animal Science, Přátelství 815, 104 00 Praha-Uhříněves, Czech Republic
4. Dairy Research Institute, s.r.o., Ke Dvoru 12a, 160 00 Prague 6, Czech Republic