Method of RAPD was taken to analysis the genetic diversity on genomic DNA among Pelteobagrus eupogon, Pelteobagrus fulvidraco, Pelteobagrus vachelli and Pelteobagrus nitidus of Dongting Lake. 36 primers were selected from 92 primers. The similarity index and the genetic distances of the four Pelteobagrus were figured out. The largest genetics distances presented between Pelteobagrus and Pelteobagrus eupogon is 0 9895 The least genetics distances presented between Pelteobagrus and Pelteobagrus fulvidraco is 0 6720 Meanwhile, cluster analysis among 4 kinds...