Abstract:Allozyme analysis of Davidia involucrata var. vilmoriniana was carried out with 78 individuals in four populations by means of horizontal starch gel electrophoresis technique. Eleven enzyme systems and 21 loci were investigated. The results show that there is high genetic diversity in Davidia involucrata var. vilmoriniana. At population level, the percentages of loci polymorphic (P)are variable from 28.6%-47.6%.