Abstract: We analyzed the allelic distribution of Y-chromosome specific microsatellite DYS19 by PCR denatured polyacrylamide gel electrophoresis in Ha n nationality and the Daur, the Oraqen and the Ewenki ethnic groups. The result demonstrated that the allelic distribution of Han nationality was dispersed: A 2. 9% , B 26. 09% , C 26. 09% , D28. 98% , E 15. 94% . There w as significant difference of allelic distribution between the Ha n nationality and three ethnic groups( P < 0. 05). We also investigated the polymorphism o f the Y-chromosome specific Alu insert sequence DYS287 in these four groups and found no Alu sequence insert.

Key words: Y chromosome, Polymorphism, Microsatellite, Alu