Studles on Phenotypes of Alkallne Phosphatase lsozyme in Duck Serums

The Phenotypes ofAlkaline Phosphatase isozyme in serums of native ducks and introduced ducks(Cairina moschata)were investigated by the methods of polyacrylaimde gel electrophoresis.The ducks from four breeds possessed six kinds of alkaline phosphatase isozyme phenotypes.i.e.Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ .and Ⅵ All male ducks had ouly Ⅰ.Ⅱ.Ⅲ phenotypes, female ducks showed great segregation,their distributions were as follows :Putian Black Duck Ⅰ 6.36%,Ⅱ8.18%,Ⅳ 56.36%, Ⅴ 29.10%:Xiangbai Duck Ⅰ 23.33%, Ⅳ40.00%, Ⅴ 36.67%:Beijing Duck Ⅰ 18.75%Ⅱ 3.13%,Ⅳ3.13%,Ⅴ 75.00%;introduced Duck Ⅰ 30.00%, Ⅱ 36.67%, Ⅳ 10.00%,Ⅴ 13.33,Ⅵ 100%.