Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Genetic Diversity and Genetic Structure of Acer pseudosieboldianum Populations in South Korea Based on AFLP Markers

AFLP 마커를 이용한 당단풍나무 집단의 유전다양성과 유전구조

  • Ahn, Jiyoung (Division of Forest Genetic Resources, National Institute of Forest Science) ;
  • Hong, Kyung-Nak (Division of Forest Genetic Resources, National Institute of Forest Science) ;
  • Baek, Seung-Hoon (Division of Forest Genetic Resources, National Institute of Forest Science) ;
  • Lee, Min-Woo (Division of Forest Genetic Resources, National Institute of Forest Science) ;
  • Lim, Hyo-In (Division of Forest Genetic Resources, National Institute of Forest Science) ;
  • Lee, Jei-Wan (Division of Forest Genetic Resources, National Institute of Forest Science)
  • 안지영 (국립산림과학원 산림유전자원과) ;
  • 홍경낙 (국립산림과학원 산림유전자원과) ;
  • 백승훈 (국립산림과학원 산림유전자원과) ;
  • 이민우 (국립산림과학원 산림유전자원과) ;
  • 임효인 (국립산림과학원 산림유전자원과) ;
  • 이제완 (국립산림과학원 산림유전자원과)
  • Received : 2016.08.01
  • Accepted : 2016.09.07
  • Published : 2016.12.31
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Abstract

Fourteen Acer pseudosieboldianum populations in South Korea were used to estimate genetic diversity, genetic differentiation and genetic relationships using seven AFLP primer combinations. The average of effective alleles ($A_e$), the proportion of polymorphic loci (%P) and Shannon's diversity index (I) was 1.4, 82.2% and 0.358, respectively. The expected heterozygosity ($H_e$) under Hardy-Weinberg equilibrium was 0.231 and the expected heterozygosity (Hj) from Bayesian inference was 0.253. The level of genetic diversity was moderate compared to those of Genus Acer and lower than those of other species having similar ecological niche and life history. The inbreeding coefficient within populations ($F_{IS}$) from Bayesian method was 0.712 and it could be influenced by selfing or biparental inbreeding to induce homozygote excess. The level of genetic differentiation was 0.107 from AMOVA (${\Phi}_{ST}$) and 0.110 from Bayesian method (${\Phi}^{II}$). The genetic differentiation was lower than those of other species having similar ecological niche and life history. Ulleungdo population had the lowest level of genetic diversity and was genetically the most distinct population from others in the study. We consider that founder effect and genetic drift might be occurred to reduce genetic diversity and then the geographical isolation might interrupt gene flow to aggravate it.

국내 당단풍나무 집단의 유전다양성, 유전분화 및 유연관계를 알아보기 위해 AFLP 분석을 실시하였다. 14개 당단풍나무 집단에 대한 7개 AFLP 프라이머 조합을 적용한 결과 유효대립유전자 수($A_e$)가 1.4개, 다형적 유전자좌 비율(%P)이 82.2%, Shannon의 다양성 지수(I)가 0.358, 이형접합도 기대치($H_e$)가 0.231이었고, 베이즈 방법으로 추론한 이형접합도 기대치(Hj)는 0.253으로 나타났다. 당단풍나무의 유전다양성은 단풍나무속 수종들과 비교했을 때 중간수준이었고, 생활사나 생태적 특성이 유사한 수종들에 비해 낮았다. 베이즈 방법으로 추정된 평균 $F_{IS}$값은 0.712로 나타나 자가수분이나 근연관계 개체 간 교배에 의한 동형접합체 증가가 유전다양성에 영향을 준 것으로 생각된다. AMOVA로 추정한 당단풍나무의 유전분화율(${\Phi}_{ST}$)은 0.107이었고, 베이즈 방법으로 추정한 유전분화율(${\Phi}^{II}$)은 0.110이었다. 당단풍나무는 생활사나 생태적 특성이 유사한 종들에 비해 유전분화가 적게 이루어진 것으로 나타났다. 유연 관계 분석에서 울릉도 집단은 내륙의 집단들과 유전적으로 가장 상이한 집단으로 나타났다. 울릉도 집단은 유전다양성이 가장 낮은 집단으로서, 내륙의 집단 일부가 이주하면서 생긴 창시자 효과와 유전적 부동에 의해 유전다양성 감소가 이루어졌고 내륙과의 지리적 격리로 인해 유전자 교류가 감소했기 때문으로 추정된다.

Keywords

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