Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Genetic Diversity and Structure of the Korean Rare and Endemic Species, Deutzia pdaniculata Nakai, as Revealed by ISSR Markers

한국 희귀 특산식물 꼬리말발도리 집단의 유전적 다양성 및 구조

  • Received : 2013.09.15
  • Accepted : 2013.10.28
  • Published : 2013.10.31
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Abstract

Deutzia paniculata Nakai is a Korean endemic species that has a very restricted distribution in Gyeongsang-do, South Korea. The genetic diversity and structure of five populations of D. paniculata were investigated using 31 ISSR loci from six primers. The Shannon's index (0.429) and genetic diversity (0.271) were relatively higher than those of other rare plant species in Korea. The Miryang (MY) and Yangsan (YS) populations, which have higher flowering rates than the other populations, showed greater genetic diversity than the other populations. An analysis of the molecular variance (AMOVA) showed that 16% of the total variation could be attributed to differences among the populations, and 84% to the differences within populations, indicating moderate gene flow among adjacent populations. The high genetic diversity and low genetic differentiation in the Deutzia paniculata populations, which have a restricted distribution, is considered to be affected by outcrossing of the mating system and abundant individuals in the populations. These results suggest that ex situ conservation strategies are needed to sustain the current genetic diversity of D. paniculata.

꼬리말발도리(Deutzia paniculata Nakai)는 전 세계적으로 우리나라 경상남북도 일부지역에만 자생하는 매우 제한된 분포범위를 가지는 특산식물이다. 이러한 꼬리말발도리 집단의 유전적 다양성 및 구조를 조사하기 위해 5집단 155개체에 대한 ISSR(Inter Simple Sequence Repeat) 분석이 수행되었다. 총 6개의 ISSR 프라이머를 이용하여 31개의 증폭산물을 관찰하였으며, 집단 수준에서의 유전적 다양성의 평균은 SI(Shannon's information index)=0.429, h (Nei's genetic diversity)=0.271로, 매우 높은 수준으로 나타났다. 집단별로는 큰 차이는 없었지만 비교적 높은 개화율을 보이는 밀양, 양산 집단이 다른 집단에 비해 다소 높은 유전 다양성을 유지하고 있는 것으로 나타났다. AMOVA 분석 결과 전체 유전변이의 약 16%가 집단 간 차이에 기인하는 것으로 설명되었으며, 나머지 84%는 집단 내 개체간에 존재하는 것으로 나타났다. 이처럼 제한된 분포범위를 가지는 꼬리말발도리 집단에서 나타나는 높은 유전다양성과 집단간 낮은 유전적 분화율은 완전 타가수정하는 교배양식과 집단내 비교적 풍부한 개체수의 영향인 것으로 판단된다. 따라서 현재의 유전다양성을 유지할 수 있는 적절한 현지 내 보전대책 수립이 요구된다.

Keywords

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