Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
권호 표지

Genetic Diversity and Structure of Natural Populations of Cornus controversa in South Korea

층층나무 天然集團의 遺傳變異와 構造

Jang, Suk-Seong;Lee, Seok-Woo;Kim, Chan-Soo;Kim, Yong-Mo;Kim, Hong-Eun
장석성;이석우;김찬수;김영모;김홍은

  • Published : 2003.03.31
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Abstract

The genetic structure of Cournus controversa Hemsl. , sampled throughout its range in South Korea, was studied using starch-gel electrophoresis, Eighteen enzyme loci in 8 enzyme systems were examined. The level of genetic diversity (A=1.6, A_e=1.192, P=48.1%, H_o=0.120, H_e=0.124) and the degree of genetic differentiation (Fsr = 0.073) were comparable to those of other tree species with similar life histories and ecological trails . Nine natural C. controversa populations seemed to he in equilibrium with the expectations of Hardy-Weinberg. Nm, the number of migrants per generation was 3.16. The UPGMA- derived dendrogram based on Nei`s (1978) genetic distance showed decisive geographic trends; the geographically close populations were genetically clcse . The spatial distribution patterns of C. controversa trees in a stand and the seed dispersal mode appeared to be critical factors that determined the genetic structure of C. coufroyerso.

우리나라에 자생하고 있는 층층나무의 집단유전학적 특성을 구명하기 위하여 9개 천연집단을 대상으로 8개 동위효소 18개 유전자좌에 대한 유전변이를 조사한 결과 유전다양성 (A=1.6, A_e=1.192, P=48.1%, H_o=0.120, H_e=0.124) 및 집단간 유전적 분화의 정도(Fst = 0.073)는 층층나무와 유사한 생태학적, 생활사적 특성을 갖는 다른 수종들과 비슷하였다. 9개 집단 모두 Hardy-Weinberg 평형상태에 있는 것으로 나타났다. 세대별 집단간 유전자 교류의 정도 (Nm)는 3.16으로 유전적 부동에 의한 집단간 분화를 방지할 수 있는 것으로 나타났다. Nei (1978)의 유전적 거리에 의한 UPGMA 유집분석 결과 지리적으로 가까운 집단들이 유전적으로도 가까웠다. 임분내 개체목들의 공간적 분포형과 중력 및 새에 의한 종자 비산 양식이 층층나무의 유전구조를 결정짓는 주요 인자인 것으로 사료되었다

Keywords

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