Abstract: Using techniques of Ag-NOR, the frequencies of Ag-NOR, SAc, SAt of 90 normal individuals of Uigur, Kazak and Han nationalities in Xinjiang Uigur Autonomous Region were studied. The results are summarized briefly in the following.
The frequencies of Ag-NOR, SAc, SAt of normal individuals of Uigur, Kazak nationalities are siginificantly higher than that in Han (P<0.01). There is no significant difference between Uigur and Kazak (P > 0.05). There is good accordance with the conclusions obtained from human genetical and anthropologcal research.

Key words: rRNA gene; Satellite association; Uigur; Kazak; Han