Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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Phylogenetic Relationships of Korean Campanulaceae Based on PCR-RFLP and ITS Sequences

PCR-RFLP와 ITS 염기서열 분석을 이용한 한국산 초롱꽃과(Campanulaceae)의 계통유연관계

  • Kim, Kyung-Ah (Department of Biological Sciences, Kangwon National University) ;
  • Yoo, Ki-Oug (Department of Biological Sciences, Kangwon National University)
  • 김경아 (강원대학교 자연과학대학 생명과학과) ;
  • 유기억 (강원대학교 자연과학대학 생명과학과)
  • Received : 2011.05.26
  • Accepted : 2011.06.07
  • Published : 2011.06.30
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Abstract

Phylogenetic studies were conducted to evaluate the taxonomic relationships among 27 taxa, including 2 outgroups of Korean Campanulaceae, using PCR-RFLP analysis and ITS sequences. In the PCR-RFLP analysis, 15 restriction endonucleases produced 244 restriction sites and size variations from the chloroplast DNA, and 59 restriction sites (24%) showed polymorphism. The length of the ITS regions ranged from 588 bp to 797 bp. The sequence divergence including the outgroups is 0-39.36%. Phylogenetic analyses based on PCR-RFLP and ITS data suggest that Campanulaceae is monophyletic; Codonopsis and Platycodon forms an independent clade; the Peracarpa and Asyneuma clade is a sister to the Adenophora-Hanabusaya clade; Campanula is monophyletic; and Wahlenbergia basally branches within the ITS tree, whereas they are placed between Campanula and the Codonopsis-Platycodon clade in the PCR-RFLP tree; Hanabusaya is placed within the Adenophora clade; and Adenophora is paraphyletic and shows discordance to the infrageneric classifications based on morphological data. The present results show two data sets, largely congruent at the generic level, but their phylogenetic positions, in particular the Wahlenbergia and Hanabusaya and the infrageneric classifications in Adenophora, show some incongruence.

한국산 초롱꽃과 8속 25분류군과 군외군 2분류군 등 총 27분류군에 대한 계통유연관계를 알아보기 위하여 PCR-RFLP와 ITS 지역의 염기서열 분석을 실시하였다. 엽록체 DNA의 11개 지역을 이용한 PCR-RFLP 분석에서는 증폭된 DNA 각각에 대하여 15가지 제한효소를 처리한 결과 총 244개의 제한효소 절편을 얻었으며, 그 중 59개는 분류군간 차이가 있어 24%의 다형화를 보였다. ITS 지역의 길이는 588-707 bp이었으며, 염기변이는 0-39.36%로 나타났다. 계통 분석 결과, PCR-RFLP와 ITS 지역의 염기서열을 이용한 계통수 모두에서 초롱꽃과는 단계통을 형성하였다. 도라지속과 더덕속은 독립적인 분계조로 유집되었고, 홍노도라지속과 영아자속은 잔대속-금강초롱꽃속을 위한 자매군을 형성하였다. 초롱꽃속도 단계통으로 나타났고, 애기도라 지속은 ITS분석에서는 가장 기부에 분계조를 형성하였지만 PCR-RFLP결과에서는 초롱꽃속과 더덕속-도라지속분계조 사이에 위치하여 차이를 보였다. 금강초롱꽃속은 잔대속과 함께 유집되었으며, 잔대속은 병계원으로 분계조를 형성하여 형태형질에 의한 속내 분류체계와 일치하지 않았다. 본 연구에서 다룬 2가지 자료에 기초한 한국산 초롱꽃과의 계통분석 결과, 속 수준에서는 대부분 일치하는 경향을 보였지만 애기도라지속과 금강초롱꽃속의 계통학적 위치와 잔대속의 속내 분류계급의 유집에서는 차이를 보였다.

Keywords

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