As far as an unisexuality in the animal kingdom is typical, in higher plants there most species are bisexual. Whereas in haploid bryophyte it can be noticed that dioecy in this group prevails. In the dioecious bryophyte a huge problem makes diagnostics of gender. Most dioecious mosses do not exhibit any discernible sexual dimorphism. The aim of present research was a finding genetic differences between two gender in the dioecious moss