Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Genetic Diversity and Spatial Genetic Structure of Berchemia racemosa var. magna in Anmyeon Island

안면도 먹넌출 집단의 유전다양성과 공간적 유전구조

  • Song, Jeong-Ho (Division of Special-purpose Trees, Korea Forest Research Institute) ;
  • Lim, Hyo-In (Division of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Jang, Kyeong-Hwan (Division of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Hong, Kyung-Nak (Division of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Han, Jingyu (Division of Forest Genetic Resources, Korea Forest Research Institute)
  • 송정호 (국립산림과학원 특용자원연구과) ;
  • 임효인 (국립산림과학원 산림유전자원과) ;
  • 장경환 (국립산림과학원 산림유전자원과) ;
  • 홍경낙 (국립산림과학원 산림유전자원과) ;
  • 한진규 (국립산림과학원 산림유전자원과)
  • Received : 2013.03.20
  • Accepted : 2013.10.01
  • Published : 2014.02.28
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Abstract

Berchemia racemosa var. magna is only found in Anmyeon Island of South Korea. Genetic diversity and the spatial genetic structure of B. racemosa var. magna in Anmyeon Island were studied by I-SSR marker system. Fifty I-SSR amplicons were produced from 8 selected primers. We used 13 polymorphic markers to analyze the genetic structure. Distribution of 39 individuals in the study plot($90m{\times}70m$) showed aggregate pattern (aggregation index = 0.706). Total 21 genets were observed from 39 individuals through I-SSR genotyping. Proportion of distinguishable genotype (G/N), genotype diversity (D) and genotype evenness (E) were 53.8%, 0.966 and 0.946, respectively. In spite of the small number and the narrow distribution, Shannon's diversity index (I = 0.598) was relatively high as compared with those of the other plant species. For ex situ genetic conservation of B. racemosa var. magna, the sampling strategy based on spatial autocorrelation using Tanimoto distance is efficient at choosing the conserved individuals with a 6 meter interval between individual trees.

우리나라에서 먹넌출은 안면도 지역에서만 소나무 숲에서 제한적으로 분포하는 덩굴성 식물이다. 본 연구는 먹넌출 집단의 분포형태와 특성, 유전다양성 및 공간분포에 따른 유전구조를 파악하는데 있다. 선발된 8개 I-SSR primer에서 총 50개의 I-SSR 증폭산물을 얻었으며 37개의 단형성 증폭산물을 제외한 13개의 다형적 증폭산물을 분석에 이용하였다. 공간적 자기상관 분석을 위한 조사구 $90m{\times}70m$내에 총 39개체의 먹넌출이 자생하고 있었으며, 군집지수(aggregation index)는 0.706으로 집중분포(clumped distribution)하는 공간분포를 나타냈다. I-SSR 표지자 분석 결과 39개체 중 유전자형이 서로 다른 21개의 유성생식체(genet)가 식별되었으며, 유전자형 비율(G/N)은 53.8%, 유전자형 다양성(D)은 0.966, 유전자형 균등도(E)는 0.946으로 각각 나타났다. Shannon의 다양성지수(I = 0.598)는 적은 개체수와 제한적 분포에도 불구하고 다른 수종들에 비해 비교적 높은 유전다양성을 나타냈다. Tanimoto distance를 이용한 공간적 자기상관 분석 결과 안면도 먹넌출의 현지외 보존을 위한 표본 추출 전략은 6m 이상의 간격을 두고 개체를 선발하는 것이 타당한 것으로 나타났다.

Keywords

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