作者单位:Int Ctr Agr Res Dry Areas, Addis Ababa, Ethiopia[1]Agr & Nat Resources Res Ctr, Kerman, Iran[2]Anim Sci Res Inst, Karaj, Iran[3]Livestock Off Agr Dept Baft, Kerman, Iran[4]Natl Inst Agr Technol INTA, San Carlos De Bariloche, Rio Negro, Argentina[5]