[Assessment of genetic diversity of Rehmannia glutinosa germplasm detected by RAPDs and ISSRs].

RAPD and ISSR markers were used to assess the germplasm genetic diversity among 10 individuals of Rehmannia glutinosa, including 8 cultivars and 2 virus-free lines micropropagated by tip tissue culture. 17 RAPD primers and 10 ISSR primers, with polymorphic and informative patterns, were selected from a total of 80 RAPD ones and 44 ISSR ones to determine these individuals' genetic diversity. The 17RAPD primers and 10 ISSR primers generated 177RAPDfragments and 110 fragments, respectively. The number of effective loci, the percentage of polymorphic loci, Shannon's Information index (I) and effective number of alleles (Ne) is in turn109, 61.58%, 0.3135, 1.3641 for RAPD makers, and 79, 71.82 %, 0.3577 and 1.4037 for ISSR markers; Jaccard's genetic similarity matrice and dendrograms for the 10 individuals were formed based on RAPD and ISSR-generated polymorphic bands. In dendrograms, they could be divided into two groups: one group containing six individuals such as Zupei 85.5, Datian 85.5, jinzhuangyuan, Jinbai, Zupei 9302 and Datian9302; the other composed of 4 ones such as Beijing No.1, Dahongpao, Dihuang 9104 and wild dihuang; the correlation coefficient of 0.649 between RAPD and ISSR markers GSs indicated that these two markers were significantly correlated. The results revealed that RAPD and ISSR markers were suitable for assessment of germplasm genetic diversity of Rehmannia glutinosa, and ISSR marker was superior to RAPD marker.