Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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A Phylogenetic Study of Korean Carpesium L. Based on nrDNA ITS Sequences

ITS 염기서열에 의한 한국산 담배풀속(Carpesium L.)의 계통분류학적 연구

  • Received : 2011.11.24
  • Accepted : 2012.02.08
  • Published : 2012.02.29
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Abstract

Phylogenetic analyses were conducted to evaluate relationships of 7 taxa of Korean Carpesium including three outgroup (Inula britannica L., Inula germanica L., Rhanteriopsis lannginosa (DC.) Rauschert) by using ITS (internal transcribed spacer) sequences of nuclear ribosomal DNA. Phylogenetic studies used maximum parsimony, neighbor-joining and maximum likelihood methods analysis. The length of the ITS sequences was 731 bp, and the lengths of the ITS1, ITS2 and 5.8S regions were 284~297 bp, 264~266 bp and 164 bp, respectively. The total number of variable sites was 111 for the entire sequences, and a parsimony informative sites of 64 are valid. Base change appeared variously in ITS1 rather than in ITS2. As the result, Korean Carpesium were formed monophyletic group and C. abrotanoides situated as the most basal clade. The results show that C. macrocephalum is closely related with C. triste. C. rosulatum has the closest relationship with C. glossophyllum. C. cernuum is close to C. divaricatum. These results suggest that the ITS data used in this study could be useful for the phylogenetic analysis of Korean Carpesium.

한국산 담배풀속(Carpesium L.) 7분류군과 3개의 외군(Inula britannica L., Inula germanica L., Rhanteriopsis lannginosa(DC.) Rauschert)을 대상으로 유연관계를 파악하기 위하여 nuclear ribosomal DNA(nrDNA) 중 ITS(internal transcribed spacer) 지역의 계통분류학적 분석을 수행하였다. 계통분류학적 연구방법은 maximum parsimony, neighbor-joining와 maximum likelihood 방법을 사용하였다. 정렬된 계통분의 총 길이는 731 bp이며, ITS1, ITS2와 5.8S 부위의 길이는 각각 284~297 bp, 264~266 bp와 164 bp로 나타났다. 계통분류학 변이를 보이는 site는 111개로 확인 되었으며, 그 중 64개의 site가 계통학적으로 유효한 것으로 나타났고, ITS1 지역이 ITS2 지역보다 염기 변이가 다양하게 나타나는 것으로 확인되었다. 그 결과, 한국산 담배풀속은 단계통을 형성하였으며, 담배풀(C. abrotanoides L.)이 가장 기저부에 위치하였다. 여우오줌(C. macrocephalum Franch. & Sav.)와 두메담배풀(C. triste Maxim.)은 가까운 유연관계를 나타냈으며, 애기담배풀(C. rosulatum Miq.)와 천일담배풀(C. glossophyllum Maxim.) 그리고 좀담배풀(C. cernuum L.)와 긴담배풀(C. divaricatum Siebold & Zucc.)도 유연관계가 가깝게 나타났다. 이와 같은 결과로 담배풀속 nrDNA의 ITS 지역 염기서열에 기초한 분자 계통학적 연구는 계통분류를 이해하는데 유용한 방법으로 판단된다.

Keywords

References

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