In order to determine a set of SSR core primers for DNA fingerprinting identification and construct SSR based fingerprinting database of Brassica napus L.,a total of 952 primers of Brassica napus L. were screened by 6 % denaturing polyacrylamide gel electrophoresis and capillary electrophoresis technique. Fingerprinting of 184 Brassica napus L. varieties were established by using selected core primers and allele size,and the factors which affected allele size were also explored in this study. Total of 47 co...