Abstract: Three isozymes (POD,SOD and EST) of Dolichomitriopsis diversiformis and Isothecium subdiversiforme were analyzed by using poly-acrylamide gel electrophoresis (PAGE).The results showed that:(1) Bands of three isozymes not only clearly showed the identical common properties of their family,but also showed their difference among species and populations.(2) Three isozymes of two species had higher similarity,showing that Dolichomitriopsis was similar to the Isothecium in genetic mapping.(3) On the level of species,the genetic diversity of I.subdiversiforme were higher than D.diversiformis,but between the populations,the genetic diversity of D.diversiformis were higher,and influence of environmental factor were larger.

Key words: Dolichomitriopsis diversiformis, Isothecium subdiversiforme, isozymes, genetic diversity