Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Genetic Relationships of Sandfish (Arctoscopus japonicas) from Five Different Areas of Korea and Japan Based on Mitochondrial DNA and Microsatellite Analyses

Mitochondrial DNA와 microsatellite marker 분석을 통한 한국과 일본에 서식하는 5 지역의 도루묵(Arctoscopus japonicas)에 대한 유전학적 유연관계 분석

  • 김은미 (국립수산과학원 생명공학과) ;
  • 강현숙 (국립수산과학원 생명공학과) ;
  • 강정하 (국립수산과학원 생명공학과) ;
  • 김동균 (국립수산과학원 생명공학과) ;
  • 안철민 (국립수산과학원 생명공학과) ;
  • 이해원 (국립수산과학원 대외협력과) ;
  • 박중연 (국립수산과학원 생명공학과)
  • Received : 2015.09.02
  • Accepted : 2015.10.12
  • Published : 2015.11.30
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Abstract

A comprehensive analysis of the population structure of the sandfish (Arctoscopus japonicas), the most abundant fishery resource in the East Sea of Korea, has not been carried out, despite its importance in Korea. The present study examined the genetic diversity and differences between five populations (two Japanese and three Korean populations) of A. japonicas captured in the East Sea using both the 401 bp sequence of mitochondrial DNA (mtDNA, cytochrome b) and five microsatellite DNA (msDNA) markers. The results of the analysis using the Cyt b sequence revealed 27 haplotypes. Based on msDNA variations, the estimated expected heterozygosity (HE) in each population ranged from 0.68 (Gampo, Korea) to 0.7765 (Erimo, Japan). Pairwise FST and AMOVA tests using both the Cyt b sequence and msDNA data pointed to significant differences between the Korean and Japanese populations (mtDNA; FST=0.2648, p<0.05, msDNA; FST=0.0814, p<0.05). These results were similar to the results of UPGMA, PCA, and structure analysis. In these analyses, the five populations were assigned to two groups (Korean populations and Japanese populations). These results shed light on the genetic diversity and relationships of A. japonicas and contribute to research on the evaluation, conservation, and utilization of Korean A. japonicas as genetic resources.

도루묵은 우리나라 동해에서 어획되는 상업적으로 중요한 수산자원으로 동해안의 자원회복관리 대상어종이며, 자원량의 회복 및 보전과 관리가 필요한 어종이다. 하지만 우리나라 도루묵 자원의 관리를 위한 유전학적 분석에 따른 연구는 매우 미비한 실정이다. 따라서 본 연구는 mitochondrial DNA의 Cytochrome b (Cyt b) 유전자 서열과 5개의 microsatellite marker의 유전자형을 토대로 우리나라 동해안 도루묵과 일본 도루묵의 유전적 다양성과 집단 구조를 분석하여 유전학적 유연관계를 파악하고, 도루묵 자원의 보전과 관리를 위한 과학적 자료를 제공하기 위해 실시하였다. 한국 3개 지역(독도, 동해, 감포)과 일본의 2개 지역(북해도와 에리모)에서 채집된 총 83개 개체의 mtDNA Cyt b 영역을 분석하여 27개의 haplotype을 확인하였다. 유전적 다양성은 에리모에서 가장 높고 감포에서 가장 낮았다. Pairwise FST값과 유전적 거리, UPGMA와 주성분분석, AMOVA test 및 structure 분석 결과, 한국의 동해안 도루묵 집단 간 유전적 차이는 거의 없었으나 일본 도루묵 집단과는 유의적인 차이가 나타났으며(p<0.05), 한국의 동해안 집단과 일본의 집단으로 그룹을 형성하며 구분되는 유연관계를 확인하였다. 본 연구에서 확인된 도루묵의 유전적 특성 및 집단 간 유연관계는 중요한 수산유전자원으로서의 도루묵에 대한 중요한 과학적인 근거자료가 될 것이며, 앞으로 도루묵의 보존, 평가 및 이용에 활용 가능한 정보를 제공할 것이라 사료된다.

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