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http://dx.doi.org/10.5352/JLS.2008.18.4.435

Genetic Diversity of Rehmannia glutinosa Genotypes Assessed by Molecular Markers  

Bang, Kyong-Hwan (Ginseng & Medicinal Plants Research Institute, RDA)
Chung, Jong-Wook (National Institute of Agricultural Biotechnology, RDA)
Kim, Young-Chang (Ginseng & Medicinal Plants Research Institute, RDA)
Lee, Jei-Wan (Ginseng & Medicinal Plants Research Institute, RDA)
Kim, Hong-Sig (College of Agriculture, Life and Environment Science, Chungbuk National University)
Kim, Dong-Hwi (Ginseng & Medicinal Plants Research Institute, RDA)
Publication Information
Journal of Life Science / v.18, no.4, 2008 , pp. 435-440 More about this Journal
Abstract
Random amplified polymorphic DNA (RAPD) markers were used to identify the genetic diversities among and within varieties and landraces of Rehmannia glutinosa. Polymorphic and reproducible bands were produced by 10 primers out of total 20 primers used in the experiment. In RAPD analysis of the 11 genotypes, 64 fragments out of 73 amplified genomic DNA fragments were polymorphic which represented an average 6.4 polymorphic fragments per primer. Number of amplified fragments with random primers ranged from 2 (OPA-1) to 13 (OPA-11) and varied in size from 200 bp to 1,400 bp. Especially, OPA-10, OPA-11 and OPA-19 primers showed specific bands for varieties of Korea Jiwhang and Jiwhang il ho, which could be useful for discriminating from other varieties and landraces of R. glutinosa. Percentage polymorphism ranged from a minimum of 50% (OPA-1) to a maximum of 100% (OPA-11), with an average of 87.7%. Similarity coefficients were higher in the genotypes of Korea Jiwhang and Jiwhang il ho than in other populations. In cluster analysis, genotypes of Korea Jiwhang, Jiwhang il ho, and Japanese accession were separated from those of other varieties and landraces. Average of genetic diversity within the population $(H_S)$ was 0.110, while average of total genetic diversity $(H_T)$ was 0.229. Across all RAPD makers the $G_{ST}$ value was 0.517, indicating that about 52% of the total genetic variation could be explained by RAPDs differences while the remaining 48% might be attributable to differences among samples. Consequently, RAPD analysis was useful method to discriminate different populations such as domestic varieties and other landraces. The results of the present study will be used to understand the population and evolutionary genetics of R. gllutinosa.
Keywords
Rehmannia glutinosa; randomly amplified polymorphic DNAs; identification; genetic diversity;
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