식물분류학회지 (Korean Journal of Plant Taxonomy)

  • 제44권1호
  • /
  • Pages.39-50
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  • 2014
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  • 1225-8318(pISSN)
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  • 2466-1546(eISSN)
한국식물분류학회 (The Korean Society of Plant Taxonomists)
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엽록체 matK 와 핵 ITS 염기서열을 이용한 나도풍란속 및 풍란속의 계통과 종동정

Phylogenetic position of Neofinetia and Sedirea (Orchidaceae) and their species identification using the chloroplast matK and the nuclear ITS sequences

  • 김영기 (고려대학교 생명과학대학 생명과학부) ;
  • 조상진 (고려대학교 생명과학대학 생명과학부) ;
  • 김기중 (고려대학교 생명과학대학 생명과학부)
  • Kim, Young-Kee (Division of Life Sciences, School of Life Sciences, Korea University) ;
  • Jo, Sang Jin (Division of Life Sciences, School of Life Sciences, Korea University) ;
  • Kim, Ki-Joong (Division of Life Sciences, School of Life Sciences, Korea University)
  • 투고 : 2014.01.27
  • 심사 : 2014.03.03
  • 발행 : 2014.03.31
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초록

엽록체 matK 유전자와 핵 ITS 염기서열을 이용하여 나도풍란속 및 풍란속의 계통학적 위치를 정립하였다. 또한, 이들 마커를 이용하여 종 및 원산지 추적에 활용가능성을 평가하였다. 풍란속과 나도풍란속은 두 마커 모두에서 뚜렷한 단계통군을 형성하였다. 풍란속의 자매군은 Vanda임이 두 마커 모두에서 입증되었으나,본 연구 결과는 풍란속을 Vanda에 포함시키는 처리에는 동의하지 않았다. 나도풍란속은 (Dimorphorchis (Pteroceras (Saccolabiun+Phalaeonopsis))) 계통군과 자매군을 형성하였고, 이중 Dimorphorchis와 자매속일 가능성이 가장 높았다. 형태적 유사성으로 나도풍란속이 Aerides와 자매속이라는 주장의 가능성은 희박하였다. 두 마커를 분석한 결과 풍란속의 경우 종 및 종 내의 산지별 구별이 가능한 것으로 평가되었다. 따라서 풍란의 재배 개체들의 기원을 규명하는데도 유용한 것으로 평가되었다. 그러나, 공공 염기서열 DB에 있는 서열들은 의유전자로 추정되는 서열들을 다수 포함하고 있었다. 또한, 재배 난과식물에는 속간 및 종간 잡종이 많으며 잡종에 의한 수평적 유전자 이동문제 등이 결부되어 있으므로, 계통학적으로 염기서열 자료를 이용하는데 주의하여야 한다. 계통분석을 위하여는 한 종 내의 여러 개체로부터 염기서열을 확보하는 것이 이러한 위험성을 줄이는 방법 중에 하나이다.

Phylogenetic positions of Sedirea and Neofinetia were addressed using the chloroplast matK and the nuclear ITS sequences. We also evaluate the usefulness of the makers for the identification of species and localities. Sedirea and Neofinetia form an independent monophyletic genus, respectively, in both matK and nuclear ITS trees. The sister genus of the Neofinetia was Vanda in both trees. In addition, our trees support the separate recognition of the Neofinetia from Vanda rather than the inclusion of Neofinetia into Vanda. The sister group of the Sedirea was (Dimorphorchis(Pteroceras(Saccolabiun+Phalaeonopsis))) clade. The Dimorphorchis was one of the most probable sister genus to the Sedirea. The sister group relationship between Sedirea and Aerides was suggested by their similar morphology, but not supported in molecular trees. The identification of species and localities of Neofinetia was possible using our two molecular markers. However, several pseudo-gene sequences are discovered from the public data base. In addition, the horizontal gene transfer of chloroplast genomes is frequent events in orchid hybrids. Therefore, we need a careful evaluation for the data prior to systematic use. Generation of sequence data from multiple accessions of a species may helpful to reduce these types of error.

키워드

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