Animal Systematics, Evolution and Diversity

The Korean Society of Systematic Zoology (한국동물분류학회)
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Phylogenetic Relationship Among Four Species of Korean Oysters Based on Mitochondrial 16S rDNA and COI Gene

미토콘드리아 16S rDNA와 COI유전자에 근거한 한국산 굴류 4종의 유연관계

  • 이상엽 (인제대학교 생명공학부) ;
  • 박두원 (국립수산진흥원 양식과) ;
  • 안혜숙 (국립수산진흥원 생물공학과) ;
  • 김상해 (인제대학교 생명공학부)
  • Published : 2000.10.01
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Abstract

Partial mitochondrial 16S rDNA and COI gene were amplified using PCR and sequenced for four species of oysters in Korea. Phylogenetic relationships among them were inferred from their aligned sequences by neighbor-joining method. The sequence comparison data of two mitochondrial genes showed that the genetic distinction between two oyster genera (Crassostreo and Ostrea) was obvious. Phylogenetic analysis based on the nucleotide sequences and A+T percentage of two genes indicates that C. gigas and C. nippona strongly formed a sister group and then C. ariakensis was clustered with the clade although that based on amino acid sequences of COI gene by neighbor-joining method represented different phylogenetic tree.

한국에서 양식되어지고 있는 한국산 굴류 4종, 굴(Crassostrea gigas Thunberg), 바위굴(C. nippona Seki), 강굴(C. ariakensis Fujita et Wakiya), 토굴(Ostrea denselamellosa Lischke)의 유전적 근연관계를 조사하고자 미토콘드리아 DNA의 16S rDNA와 cytochrome c oxidase I (COI) 유전자 일부분의 염기서열을 분석하였다. 16S rDNA의 319 bp와 COI유전자의 710 bp를 PCR 증폭하여 염기서열을 결정하였으며, 염기서열과 아미노산서열을 자료로 하여 UPGMA와 neighbor-joining 방법으로 계통수를 작성하고, 종간 유연관계를 확인하였다. Crassostrea 속과 Ostrea 속간 비교에서는 뚜렷한 유전적 분화를 나타내었으며 계통분석 결과, neighbor-joining 방법에 의한 COI의 아미노산 서열분석에서는 굴과 강굴이 자매군을 형성하는 양상을 보였으나 두 유전자의 염기서열과 A+T 비율 비교에서는 굴과 바위굴이 자매군을 형성하는 것으로 나타났다.

Keywords

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