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Phylogenetic analysis of 14 Korean Araliaceae species using chloroplast DNA barcode analysis

엽록체 DNA 바코드 분석을 통한 한국산 두릅나무과 식물 14종의 유연관계 분석

  • Hwang, Hwan Su (Department of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Choi, Yong Eui (Department of Forest Resources, College of Forest and Environmental Sciences, Kangwon National University)
  • 황환수 (강원대학교 산림환경과학대학 산림자원학과) ;
  • 최용의 (강원대학교 산림환경과학대학 산림자원학과)
  • Received : 2016.01.16
  • Accepted : 2016.03.18
  • Published : 2016.03.31

Abstract

Most Araliaceae plant species distributed in Korea are economically important because of their high medicinal values. This study was conducted to develop barcode markers from sequence analysis of chloroplast DNA in 14 taxa of Araliaceae species grown in South Korea. Sequencing of seven chloroplast DNA regions was performed to establish the DNA barcode markers, as suggested by the Consortium for the Barcode of Life (CBOL). From the sequence analysis of chloroplast DNA, we identified specific sequences and nucleotides that allowed us to discriminate among each other 14 Korean Araliaceae species. The sequence in the region of psbA-trnH revealed the most frequent DNA indels and substitutions of all 7 regions studied. This psbA-trnH marker alone can discriminate among all 14 species. There are no differences between Korean and Chinese Panax ginseng in all seven sequenced chloroplast DNA regions. A phylogenetic tree constructed using the seven chloroplast DNA regions revealed that Tetrapanax papyriferus should be classified as an independent clade. The Aralia and Panax genera showed a close phylogenetic relationship. Five species in the Eleutherococcus genus were more closely related to Kalopanax septemlobus than to any Panax species.

한국에 분포하는 두릅나무과 식물 대부분은 중요한 약용 식물로 경제적인 가치가 크다. 본 연구는 분자적 방법인 엽록체 DNA 바코드 염기서열 분석을 통해 한국에 자생하고 있는 두릅나무과 식물 14종 전체의 속 및 종간 유연관계를 파악해 보고 이를 구별할 수 있는 마커를 개발하기 위해 수행되었다. 국제 생물 DNA 바코드 컨소시엄(CBOL, the Consortium for the Barcode of Life)이 DNA barcoding marker로 제안한 엽록체 DNA 7영역의 염기서열을 분석한 결과, psbA-trnH영역에서 가장 많은 삽입, 결실 및 염기치환이 나타났으며 조사된 한국의 두릅나무과 식물 14종 모두 구분 될 수 있었다. 또한 각각의 영역에서 특정 속과 종만이 지니는 특이적인 염기서열을 찾을 수 있었다. 인삼의 경우 중국삼과 한국삼의 염기서열에는 차이가 전혀 없었다. 7영역을 모두 유합하여 작성한 계통수에서는 통탈목이 특이성을 나타내며 가장 기부에 분계조를 형성하였다. 두릅나무속과 인삼속은 자매군을 형성하였고, 오갈피속 5 종 역시 서로 높은 유연관계를 나타내었다. 결론적으로 한국에 자생하는 14종의 두릅나무과 식물들이 모두 엽록체 DNA 바코드 마커 개발을 통해 동정이 가능함을 확인하였다.

Acknowledgement

Grant : 포스트게놈다부처유전체사업

Supported by : 강원대학교 산학협력단(University-industry Cooperation Foundation, KNU)

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