RAPD markers were used to analysis the genetic diversity among 41 samples of Djpterocarpus allatus Roxb., an important tree species of Vietnam. Genetic similarity indeces varied from 43 percent to 100 percent. The samples collected from 10 provinces of 3 forest ecological regions in Vietnam can be divided into 5 main groups: Group I includes samples such as D-CT-1-4, D-DMC-1-5, D-TP-5,6,l1 which showed difference of about 18, 21, 47 and 57 percent from groups II, III, IV and V
group II includes samples such as D-CP-1-5, D-ES2,3,5 and D-TP-1
group III includes samples such as D-BS-1-5, D-HTB-1-5
group IV includes samples such as D-DT-4 and D-DT-5 and group V includes remaining samples.