1. National Engineering Laboratory for Animal Breeding; China Agricultural University; Beijing China
2. Ministry of Agricultural Key Laboratory of Animal Genetics, Breeding and Reproduction; China Agricultural University; Beijing China
3. College of Animal Science and Technology; China Agricultural University; Beijing China
4. Laboratoire de Recherche en Biologie Appliquée; Ecole Polytechnique d'Abomey-Calavi; Université d'Abomey-Calavi; Cotonou Bénin