Polymorphism of glucose phosphate isomerase from mulberry (Morus spp.).

Abstract

Glucose phosphate isomerase isoforms from leaves of 259 mulberry varieties were separated by starch gel electrophoresis. Varietal differences in the electrophoretic patterns of the isoforms were identified. A total of five patterns of the isoforms were detected in these varieties. The 259 varieties had specifically one of these patterns. The pattern similarity among varieties was not highly correlated to that of the other enzymes and proteins as previously reported, suggesting that mulberry varieties cannot be classified by the use of only a single enzyme or protein as a marker. However, it was found that the electrophoretic patterns can be used for variety identification with the aid of some characteristics such as the electrophoretic patterns of the other enzymes and proteins.