1. Jiangsu Joint International Research Laboratory of Animal Gastrointestinal Genomes Research Center for Livestock Environmental Control and Smart Production, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, P.R. China
2. Animal Production Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt
3. Department of Poultry Production, Faculty of Agriculture, Fayoum University, Fayoum, Egypt