Random amplified polymorphic DNA(RAPD)was applied to assess genetic variations in three populations of Labeoninae(25 individuals). Eighty-one polymorphic bands were observed by amplifications of 12 random primers selected from 40 primers. The results showed that S. decorus tungting, C. rnoli torella and S. rendahli rendahli had the intra-population genetic similarity index of 0. 8777, 0. 8828, and 0. 9091, respectively, indicating the low intra-population genetic differentiation. The inter-population genetic distance was 0. 5576 between S. ...