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Genetic variation and population structure in Korean populations of sand dune speciesSalsola komarovi (Chenopodiaceae)

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Abstract

Salsola komarovi lljin is a herbaceous annual native to the sand dunes and beaches of Japan, northern China, Sakhalln and Korea. Starch-gel electrophoresis was conducted on leaves and stems collected from 300 plants in eight Korean populations. The mean number of alleles per locus (A p=1.51), mean expected heterozygosity (He p=0.116), and total genetic diversity (H T=0.279) were comparable with those for species with similar life history and ecological traits. A general conformance of genotype frequencies to Hardy-Weinberg expectations (meanF IS=−0.030) indicates thatS. komarovi is an outcrossing species. Slightly more than 20% of the genetic variation was found among populations (F ST=0.204). In addition, significant differences in allele frequency were detected between populations at all 11 polymorphic loci (P<0.001). Nei's genetic identities range from 0.885 to 0.985 with a mean of 0.942. However, indirect estimates of the number of migrant per generation (0.97, calculated fromF ST and 0.31, calculated from seven private alleles) indicate that the levels of gene flow is low among Korean populations. Although the species maintains a moderate level of genetic variation within populations, the small, isolated natural populations of the species have been severely destructed by human activities, particularly in summer season. If this is true, conservation efforts should be focused on those populations that currently maintain the most genetic diversity (e.g., populations of Cheju Island and coast of the southwestern Korean Peninsula).

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Authors and Affiliations

  1. Department of Biology, Pusan National University, Pusan, The Republic of Korea

    Seung Tae Kim

  2. Department of Biology, Gyeongsang National University, Chiniu, The Republic of Korea

    Myong Gi Chung

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  1. Seung Tae Kim
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Kim, S.T., Chung, M.G. Genetic variation and population structure in Korean populations of sand dune speciesSalsola komarovi (Chenopodiaceae). J. Plant Res. 108, 195–203 (1995). https://doi.org/10.1007/BF02344344

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