Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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The genetically healthy terrestrial orchid Liparis krameri on southern Korean Peninsula

  • CHUNG, Mi Yoon (Division of Life Science and the Research Institute of Natural Science (RINS), Gyeongsang National University) ;
  • CHUNG, Jae Min (Division of Plant Resources, Korea National Arboretum) ;
  • SON, Sungwon (Division of Plant Resources, Korea National Arboretum) ;
  • MAO, Kangshan (Key Laboratory for Bio-resources and Eco-environment of Ministry of Education, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University) ;
  • LOPEZ-PUJOL, Jordi (Botanic Institute of Barcelona (IBB, CSIC-ICUB)) ;
  • CHUNG, Myong Gi (Department of Biology and RINS, Gyeongsang National University)
  • Received : 2019.11.20
  • Accepted : 2019.12.27
  • Published : 2019.12.30
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Abstract

Neutral genetic diversity found in plant species usually leaves an indelible footprint of historical events. Korea's main mountain range (referred to as the Baekdudaegan [BDDG]), is known to have served as a glacial refugium primarily for the boreal and temperate flora of northeastern Asia. In addition, life-history traits (life forms, geographic range, and breeding systems) influence the within- and among-population genetic diversity of seed plant species. For example, selfing species harbor significantly less within-population genetic variation than that of predominantly outcrossers. A previous study of two Liparis species (L. makinoana and L. kumokiri) emphasizes the role of the abovementioned factors shaping the levels of genetic diversity. Liparis makinoana, mainly occurring on the BDDG and self-incompatible, harbors high levels of within-population genetic diversity (expected heterozygosity, HeP = 0.319), whereas there is no allozyme variation (HeP = 0.000) in L. kumokiri, which is self-compatible and mainly occurs in lowland hilly areas. To determine if this trend is also found in other congeners, we sampled five populations of L. krameri from the southern part of the Korean Peninsula and investigated the allozyme-based genetic diversity at 15 putative loci. The somewhat intermediate levels of within-population genetic variation (HeP = 0.145) found in L. krameri are most likely due to its occurrence in mountainous areas that, despite being outside of the main ridge of the BDDG, still served as refugia, and a self-incompatible breeding system. Management strategies are suggested for L. krameri and L. makinoana based on the levels and distribution of genetic diversity and inbreeding.

Keywords

References

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