Kenaf Hibiscus cannabinus L.and Castor Ricinus communis L.are both economic crops in china.In order to further the research on gerlnplasm resources and build the data base of DNA fingerprints bands for gene resources,this paper adopts 84 Kenaf and 81 Castor variety resources which are introduced and preserved from home and abroad as materials for experiment, then starts to screen ISSR and SRAP polymorphic primers based on the work of extracting DNA bands.In addition,it becomes to respectively PCR amp...