The polymorphism of the serum transferrin was investigated in the blood sam-ples from 196 Tibetan-sheep rearing in the Qinghai Sanjiaocheng Stud Farm and in the coun-ty of Dari by means of a polyacrylamide gel electrophoresis.

• 采用聚丙烯酰胺凝胶电泳法对青海省三角城种羊场和达日县的196份藏羊血样进行了血清运铁蛋白多态性的研究。