RAPD analysis for the genetic diversity of four poplulations of davidia involucrata Baill.in Shengnoongjia area, hubei Province

Twenty-eight individuals of four Davidia involucrata Baill. populations in Shennongia area, Hubei Province were analyzed by using random amplified polymorphic DNA (RAPD) markers to determine the genetic variation among and within the populations:Eighty-seven loci were detected using sixteen 10 \mathrmbp random primers, of which 49 were exhibited polymorphism. The average percentage of polymorphic loci (PPL) was 30.2 \%, while that of polymorphic loci (PPL) was 56.3 \%. Data were analyzed by the software POPGENE and results showed that the average Nei's genetic diversity was 0.1118, Shannon's genetic diversity information index was 0.1651, genetic diversity of all populations was 0.1692 and Gst was 0.3392. The results indicate that D. involucrata in this area has relatively low genetic diversity and most of differentiation is within populations.