Genetic diversity in the common terrestrial orchid oreorchis patens and its rare congener oreorchis coreana: Inference of species evolutionary history and implications for conservation

Mi Yoon Chung, Jordi López-Pujol, Masayuki Maki, Ki-Joong Kim, Jae Min Chung, Byung Yun Sun, Myong Gi Chung

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We hypothesized that the main Korean mountain ranges provided many refugia for boreal plant species, where they likely found relatively stable habitats and maintained large population sizes. Under this scenario, high levels of genetic variation and low degree of differentiation among populations within these species were anticipated. To test this hypothesis, we examined levels of allozyme diversity (17 loci) in 12 populations of the common terrestrial montane orchid Oreorchis patens from the main ranges in Korea and 4 populations of its rare congener O. coreana, which is restricted to the Korean island of Jeju. As expected, O. patens harbored high levels of genetic variation within populations (%P = 62.8, A = 1.96, Ho = 0.211, and He = 0.237). Allele frequency differences among populations were low (FST = 0.075), and the species also displayed a significant correlation between pairwise genetic differentiation and geographical distance. All these results suggest that extant populations were founded by multiple genetically diverse individuals and that most of this initial diversity would have been maintained in the stable mountainous conditions during Quaternary climatic oscillations. In contrast, we were unable to detect any genetic diversity in O. coreana, suggesting that contemporary populations likely originated from a single ancestral source population that had lost all genetic variability. From a long-term conservation genetics perspective, extreme rarity and small population sizes, coupled with its apparent genetic uniformity, place O. coreana at a high risk of extinction. Thus, both in situ and ex situ conservation efforts should be of particular importance for this species.

Original languageEnglish
Pages (from-to)692-702
Number of pages11
JournalJournal of Heredity
Volume103
Issue number5
DOIs
Publication statusPublished - 2012 May 1

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History
Population
Population Density
Korea
Islands
Gene Frequency
Isoenzymes
Ecosystem

Keywords

  • allozymes
  • founder effect
  • Korea
  • montane
  • population history

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Biotechnology
  • Genetics(clinical)

Cite this

Genetic diversity in the common terrestrial orchid oreorchis patens and its rare congener oreorchis coreana : Inference of species evolutionary history and implications for conservation. / Chung, Mi Yoon; López-Pujol, Jordi; Maki, Masayuki; Kim, Ki-Joong; Chung, Jae Min; Sun, Byung Yun; Chung, Myong Gi.

In: Journal of Heredity, Vol. 103, No. 5, 01.05.2012, p. 692-702.

Research output: Contribution to journalArticle

Chung, Mi Yoon ; López-Pujol, Jordi ; Maki, Masayuki ; Kim, Ki-Joong ; Chung, Jae Min ; Sun, Byung Yun ; Chung, Myong Gi. / Genetic diversity in the common terrestrial orchid oreorchis patens and its rare congener oreorchis coreana : Inference of species evolutionary history and implications for conservation. In: Journal of Heredity. 2012 ; Vol. 103, No. 5. pp. 692-702.
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