Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Species Identification and Molecular Phylogenetic Position of Korean Damselfishes (Pomacentridae: Chrominae) Based on DNA Bioinformation

DNA 생물정보를 이용한 한국산 자리돔과 어류의 분류 및 분자계통학적 위치

  • Koh, Jeong Rack (Fisheries Resources Restoration Development and Management Center, National Fisheries Research & Development Institute (NFRDI)) ;
  • Park, Yung Chul (Research Institute of EcoScience, Ewha Womans University)
  • Received : 2007.10.01
  • Accepted : 2007.11.28
  • Published : 2007.12.31
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Abstract

The subfamily Chrominae of damselfishes (Teleostei: Pomacentridae) includes the genus Chromis and Dascyllus. They are found throughout the tropical oceans and form a major component of coral reef communities. There are 5 species of the Chrominae currently recognized in Korea. This study was conducted to infer phylogenetic position of two Korean Chromis species and one Dascyllus species within general category of their each genus in worldwide level. This study also includes one species of Japanese Dascyllus. In the phylogenetic analysis, the Japanese D. aruanus grouped with D. aruanus previously reported from French Polynesia. Korean Chromis fumea grouped with Australian C. nitida and the p-distance value between the two species is relatively very low (0.047). Korean C. notatus grouped together with C. flavomaculata (New Caledonia). In the sequence analysis of some Korean and Japanese damselfishes, there was no sequence variation between D. melanurus (Jeju, Korea) and D. melanurus (Indo-Pacific), but the sequences of the two populations were different in only one nucleotide sites from that of D. melanurus in Indonesian Archipelago. The sequences of Dascyllus aruanus (Japan) were different in two nucleotide sites from it in French Polynesia. There were high difference between the sequences of two Korean species, Chromis fumea and Korean C. notatus. The variations among mitochondrial cytochrome b sequences indicate that the gene sequence could be used as DNA barcode for identification of local populations of D. aruaus and D. melanurus as well as species level.

자리돔과(Teleostei: Pomacentridae) 어류는 열대 및 아열대 해역에 널리 분포하고 있으며 특히 산호해역의 해양생물 군락을 이루는 주요구성 어류이다. 현재 우리나라에는 본과에 5종이 분포하는 것으로 알려져 있는데 본 논문에서는 genus Chromis와 Dascyllus 2속을 대상으로 분자계통학적 위치를 규명하는데 그 목적이 있다. 분자계통분석에서 일본산 D. aruanus는 계통도상에서 폴리네시아산 D. aruanus와 함께 유집되었고, 우리나라의 Chromis fumea는 호주의 C. nitida와 함께 유집되었으며, 두 종간의 유전적 거리를 표시하는 P 값은 0.047로 상대적으로 매우 낮았다. 우리나라의 C. notatus는 뉴칼레도니아산 C. flavomaculata와 함께 유집되었는데, 특히 제주의 D. melanurus와 인도-태평양의 D. melanurus 사이에는 유전자 염기서열의 차이가 전혀 관찰되지 않았다. 그러나 이 두 지역의 D. melanurs와 인도네시아의 D. melanurus간에는 한개의 염기서열 차이가 있었다. 일본산 Dascyllus aruanus의 염기서열은 폴리네시아산 Dascyllus aruanus와 2개의 염기서열 차이가 있었고, 한국산 Chromis fumea와 C. notatus 사이에는 다소 많은 수의 염기서열 차이가 있었다. 본 논문에서 도입한 미토콘드리아 cytochrome DNA의 염기서열 정보 및 분석은 이 유전자가 종 수준에서 뿐만 아니라 지역집단의 구분 및 확인을 위한 DNA 바코드로서 이용될 수 있음을 보여준다.

Keywords

Acknowledgement

Supported by : NFRDI (National Fisheries Research and Development Institute)

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