Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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A phytogeographical study of Sasa borealis populations based on AFLP analysis

AFLP 마커를 이용한 조릿대 개체군의 식물지리학적 연구

  • Kim, Il Ryong (Ecological Conservation Research Department, National Institute of Ecology) ;
  • Yu, Dasom (Department of Biological Sciences, Ajou University) ;
  • Choi, Hong-Keun (Department of Biological Sciences, Ajou University)
  • 김일룡 (국립생태원 생태보전연구본부) ;
  • 유다솜 (아주대학교 생명과학과) ;
  • 최홍근 (아주대학교 생명과학과)
  • Received : 2014.11.11
  • Accepted : 2015.02.13
  • Published : 2015.03.31
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Abstract

Sasa borealis (Hack.) Makino & Shibata is widely distributed in South Korea. With amplified fragment length polymorphism (AFLP) markers, we analyzed the genetic diversity of S. borealis to predict and measure the phytogeographical factors of these populations. Relatively high levels of genetic diversity (PPL = 37.2%, h = 0.143, I = 0.205) and genetic differentiation ($G_{ST}$ = 0.324, ${\theta}^B$ = 0.395) were confirmed in populations of S. borealis. Moreover, an analysis of molecular variance (AMOVA) showed that the rate of differentiation among the populations was 47.7%. The results showed that genetic diversity is inversely proportional to the latitude of the S. borealis populations, indicating that the distribution of S. borealis may have extended from lower to higher latitudes. This method of investigating the correlation between genetic diversity and latitude presents critical information for estimating changes in distributions and plant conservation due to climate change.

본 연구는 전국에 분포하는 조릿대[Sasa borealis (Hack.) Makino & Shibata]의 12 개체군을 대상으로 유전다양성을 분석하고, 이러한 분석 결과를 식물지리학적인 해석을 통하여 기후변화와 같은 변화 요인을 객관적으로 측정하고 예측할 수 있는 방법을 제시하기 위해 수행되었다. AFLP (amplified fragment length polymorphism) 분석을 통한 유전다양성 조사 결과, 조릿대 개체군의 유전다양성(PPL = 37.2%, h = 0.143, I = 0.205)과 유전적 분화도($G_{ST}$= 0.324, ${\theta}^B$=0.395)는 비교적 높은 수준으로 나타났다. AMOVA (Analysis of molecular variance) 분석 결과에서도 전체 유전적 변이 중 47.7%가 개체군 간 변이에 의한 것으로 나타났다. 그리고 조릿대 개체군들의 유전다양성은 위도가 높아짐 따라 감소하는 것이 확인 되었으며, 이는 남방계 식물인 조릿대의 분포가 낮은 위도에서 높은 위도로 전파된 과정과 일치하는 것으로 해석할 수 있다. 따라서 식물 개체군의 AFLP 분석 결과를 위도 변화와 비교 분석함으로써 기후변화에 따른 분포 변화의 정도를 파악하고 주요 식물의 보전 전략을 세우는 데 필요한 정보를 제공할 수 있다.

Keywords

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