[1] Huazhong Agr Univ, Coll Anim Sci & Vet Med, Key Lab Agr Anim Genet Breeding & Reprod, Minist Educ, Wuhan, Hubei, Peoples R China
[2] Benha Univ, Fac Agr, Anim Prod Dept, Moshtohor, Mushthar, Egypt
[3] Guangdong Acad Agr Sci, Inst Anim Sci, Key Lab Anim Nutr & Feed Sci South China, Guangdong Key Lab Anim Breeding & Nutr,Key Lab Po, Guangzhou, Peoples R China
[4] Zagazig Univ, Fac Technol & Dev, Anim & Poultry Prod Dept, Zagazig, Egypt
[5] Assiut Univ, Fac Agr, Dept Poultry Prod, Assiut, Egypt
[6] Islamia Univ Bahawalpur, Fac Vet & Anim Sci, Dept Anim Breeding & Genet, Bahawalpur, Pakistan
[7] Natl Res Ctr, Dept Anim Prod, Giza, Egypt
[8] Cairo Univ, Fac Vet Med, Dept Nutr & Clin Nutr, Giza, Egypt