Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Genetic Diversity and Population Structure of Pseudobagrus fulvidraco in the Nakdong River

낙동강에 분포하는 동자개 집단의 유전적 다양성과 집단구조

  • Huh, Man-Kyu (Department of Molecular Biology, Dong-Eui University) ;
  • Choi, Joo-Soo (Department of Molecular Biology, Dong-Eui University) ;
  • Heo, Youn-Seong (Department of Molecular Biology, Dong-Eui University) ;
  • Lee, Bok-Kyu (Department of Molecular Biology, Dong-Eui University)
  • 허만규 (동의대학교 분자생물학과) ;
  • 최주수 (동의대학교 분자생물학과) ;
  • 허윤성 (동의대학교 분자생물학과) ;
  • 이복규 (동의대학교 분자생물학과)
  • Published : 2007.07.30
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Abstract

Enzyme electrophoresis was used to estimate genetic diversity and population genetic structure of Pseudobagrus fulvidraco in Korea. Nine of the 14 loci (64.3%) showed detectable polymorphism. Genetic diversity at the population and species levels were 0.286 and 0.277, respectively. Analysis of fixation indices, calculated for all polymorphic loci in each population, showed a substantial deficit of hetero-zygotes relative to Hardy-Weinberg expectations. This deficit is expected that it is due to a limited effective number of individuals per population. The average $G_{ST}$ for polymorphic loci was 0.064, indicating that most (93.6%) of the genetic diversity occurred within populations. The indirect estimate of gene flow based on mean $G_{ST}$ was 3.67. Given limited gene flow is expected to diverge genetically due to drift and reduced populations. Most populations in our study experience annual, severe demo-graphic bottlenecks due to drought and floods.

전분 젤 전기영동을 사용하여 한국내 분포하는 동자개 여섯 집단에서 유전적 다양성과 집단구조를 평가하였다. 14개 대립유전자좌위에서 9좌위가 다형현상을 나타내었다(64.3%). 종수준과 집단수준에서 유전적 다양성은 각각 0.286과 0.277이였다. Wright의 고정지수에서 Hardy-Weinberg 평형에 비해 전반적인 이형접합체 결핍이 나타났다. 이 결핍은 집단내 유효한 개체수의 부족을 시사한다. 집단간 유전적 분화 정도는 0.064로 대부분의 유전적 변이(93.6%)가 집단내에 있음을 의미한다. 간접적으로 평가된 집단간 이주하는 개체수는 3.67로 나타났다. 제한된 유전자 유동과 유효집단의 감소는 유전적 부동을 유발하고, 주기적인 포획으로 인한 개체수의 감소는 유전자 상실로 이어지고 있다. 대부분의 집단이 겨울철 가뭄과 여름철 홍수로 심한 병목을 겪고 있었다.

Keywords

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