The article analyzed esterase and catalase isozymes in seven species of buckwheat which from Inner Mongolia area by polyacrylamide gel electrophoresis,The relationships and the strength of resistance among the seven buckwheat were compared,The results showed that the relationships between Wu 2 and other species were far,Chi 1,Wu 1,Tong 1,and Tong 2 in relationship were near with each other,Tong 3 and Wu 1 also had a close relationship. The strength of resistance among these buckwheat were Tong 2,Tong 1,Wu 1...