Abstract: Objective To understand the features of some genetic characters of Gejia groups and Mulan nationality in Guizhou. Methods A morphological survey on 342 random people of the Mulan (male156, female 186) and 412 Gejia (male217, female 195) living in Majiang and Huangping county in Guizhou respectively were carried out. Meanwhile, the frequencies of four genetic characters were calculated, and its’ correlations were analyzed. Results The frequencies of dominant characters of thumb style, hair of middle finger, style of fore and ring finger, curl of little finger in Mulan were 7.6%, 27.8%, 5.3%, and 95.0% respectively. Those of Gejia were 47.6%, 53.2%, 17.2%, 45.4% respectively. The style of fore and ring fingers was significantly correlated with the curl of little finger in Gejia, and the thumb style was significantly correlated with the curl of little finger in Mulan(P＜0.01). Conclusions Four genetic characters have ethnic differences between the Mulan and Gejia in Guizhou, and these indices show a little correction.

Key words: genetic character, human population genetics, Mulan nationality, Gejia population, Guizhou