RAPD and ISSR analyses of genetic diversity of American ginseng germplasm from different habitats in China / 中草药

ABSTRACT

Objective: To analyze the genetic diversity of American ginseng (Panax quinquefolium) produced in 10 regions of China by usting RAPD and ISSR. Methods: Genomic DNA was extracted by CTAB and the following two kinds of ginseng were used as controls which are ginseng (P. ginseng) produced in China and American ginseng produced in Canada. Thirteen RAPD primers and 12 ISSR primers were selected to perform PCR amplification. According to the band number, NTSYS-pc2.10e software was applied to the cluster analysis using UPGMA. Results: Thirteen RAPD primers had amplified 97 clear bands, 81 polymorphic bands, and the percentage of polymorphism was 85.51%; Twelve ISSR primers had amplified 99 clear bands, 64 polymorphic bands, and the percentage of polymorphism was 64.65%; Through cluster analysis, the samples were clustered into four categories by RAPD and RAPD + ISSR and two categories by ISSR. Conclusion: RAPD and ISSR markers are used to construct a dendrogram of samples, which is slightly different in classification, but the overall trend is consistent. Ginseng and American ginseng are clear distinction. On the ISSR, American ginseng from Xingshen Town and Beigang Town in Jilin province are gathered for a major categories with ginseng. In the growing environment and planting conditions, the genetic diversity of American ginseng has been changed in the part of northeast China compared with Canada.