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Comparison of Genetic Diversity and Population Structure of Kalopanax pictus (Araliaceae) and its Thornless Variant Using RAPD  

Huh, Man-Kyu (Dept. of Molecular Biology, Dong-eui Univ.)
Jung, Sang-Duk (Dept. of Molecular Biology, Dong-eui Univ.)
Moon, Heung-Kyu (Biotech. Division of Forest Genetics, Korea Forest Research Institute)
Kim, Sea-Hyun (Tree Breeding Division, Korea Forest Research Institute)
Sung, Jung-Sook (Division of Ginseng & Medical Crops, National Institute of Crop Sci., RDA)
Publication Information
Korean Journal of Medicinal Crop Science / v.13, no.2, 2005 , pp. 69-74 More about this Journal
Abstract
Kalopanax pictus is a long-lived woody species mostly distributed in East Asia. K. pictus has been regarded as medically and ecologically important species in Korea. Thornless castor aralia variant, local name 'Cheongsong' is an endemic to Cheongsong province in Korea. Random amplified polymorphic DNA (RAPD) was used to investigate the genetic variation and structure of Korean populations of two species. A high level of genetic variation was found in six K. pictus populations. Twelve primers revealed 49 loci, of which 29 were polymorphic (59.2%). Nei's gene diversity for K.pictus and K. pictus variant were 0.119 and 0.098, respectively. Mean of genetic diversity in K. pictus was higher than average values for species with similar life history traits. The asexual and sexual reproduction, perennial habitat, and longevity are proposed as possible factors contributing to high genetic diversity. An indirect estimate of the number of migrants per generation (Nm=0.857) indicated that gene flow was not extensive among Korean populations of K.pictus. It is suggested that the isolation of geographical distance and reproductive isolation between K.pictus and K.pictus variant populations may have played roles in shaping the population structure of this species.
Keywords
Kalopanax pictus; thornless castor aralia; genetic variation; genetic structure;
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