Abstract: By means of polyacrylamide gel electrophoresis, peroxidase isozyme of Vicia L. Species distributed in northeast of china was analysed. In conjunction with the works of morphology, cytology and population investigation the results showed that molecular data were in general in agreement with the studies of morphology and cytology. Taxonomic treatments were given to some controversial species and origins of some multiploids were guessed.

Key words: Peroxidase isoenzyme, Vicia L., Population