[1] Shandong Agr Univ, Coll Agron, Dept Genet, Tai An 271018, Shandong, Peoples R China
[2] Shandong Agr Univ, Dept Anim Genet Breeding & Reprod, Coll Anim Sci & Vet Med, Tai An 271018, Shandong, Peoples R China
[3] Taishan Univ, Dept Biol Sci & Technol, Tai An 271000, Shandong, Peoples R China