Development of Chloroplast SSR Markers to Distinguish Codonopsis lanceolata from Codonopsis Genus
Background : Codonopsis lanceolata is a flowering perennial climber. The roots are used as medicinal materials or vegetables. C. lanceolata is distributed in India and East Asia such as China, Japan as well as Korea. Recently, demand for C. lanceolata is increasing as a healthy food. In South Korea, this plant is widely cultivated in Gangwon-do province. Although, C. lanceolata is one of the most important medicinal plants in Korea, it is easy to be confused with other species of the same genus. Simple sequence repeat (SSR) marker is a powerful tool for distinguish specific species. In addition, there are many studies that show species-specific polymorphisms in chloroplasts SSR. In this study, we developed chloroplast SSR markers that can distinguish C. lanceolata from 6 Codonopsis species. Methods and Results : We collected 6 Codonopsis species include C. lanceolata. and extrated DNA using CTAB method. The DNA was diluted to 10 ng/㎕ and kept at –20℃. We designed the primer sets using CLC Main Workbench based on chloroplast DNA SSR region of C. lanceolata. PCR was performed using three independent plants for each species. Conclusion : We designed six primer sets from six SSR regions of C. lanceolata cpDNA. All of the primer sets amplified the amplicon effectively. Two of the 6 primer sets had polymorphism. We could distinguish C. lanceolata from 6 Codonopsis species using two primer sets.