Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
권호 표지

Phylogenetic study of Korean Geranium(Geraniaceae) based on nrDNA ITS squences

ITS 염기서열에 의한 한국산 쥐손이풀속(Geranium)의 계통학적 연구

  • 우정현 (영남대학교 이과대학 생물학과) ;
  • 박선주 (영남대학교 이과대학 생물학과)
  • Received : 2006.03.22
  • Accepted : 2006.06.10
  • Published : 2006.06.30
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Abstract

Phylogenetic analyses were conducted to evaluate evolution and relationship of 16 taxa of Korean Geranium including 3 outgroups using ITS (internal transcribed spacer) squences of nuclear ribosomal DNA. Phylogenetic studies used most parsimony and neighbor-joining methods including bootstrapping and jackknifing analysis. As the result, Korean Geranium forms monophyletic group. In the parsimony tree G. koraiense var. hallasanense situated as the most basal clade and Erianthum group forms one clade by high bootstrap ans jackknife values (100% of bootstrap and jackknife values). G.dahuricum as one of the Krameri group is closely related with Palustre group by very weak relationship (37% of bootstrap and 44% of jackknife values) and the node collapse in the strict tree. G. Knuthii which was one of wilfordii group is closely related with Koreanum group. G. sibiricum, one of Sibiricum group, is the most closest relationship with G. soboliferum and these species are sister to G. krameri. G. tripartitum and G. wilfordii which are wilfordii group are linked to G. nepalense, G. thunbergii f. pallidum and G. thunbergii. This result suggested that the phylogenetic analysis of ITS sequences should be useful to address phylogenetic questions on the genus Korean Geranium.

한국산 Geranium(쥐손이풀속) 16분류군과 3개의 군외군을 대상으로 진화와 유연관계를 평가하기 위하여 nuclear ribosomal DNA 중 internal transcribed spacer (ITS) 구간에 대한 계통 분류학적 분석을 수행하였다. 계통 분류학적 연구들은 bootstrapping, jackknifing을 포함한 parsimony 방법과 neighbor-joining 방법을 사용하였다. 그 결과 한국산 쥐손이풀속은 단계통군을 형성하였다. Parsimony tree에서 한라이질풀은 가장 기부에 위치하였으며 Erianthum group은 높은 지지도에 의해 하나의 분계조를 형성하였다(100% bootstrap과 jackknife values). Krameri group인 산쥐손이는 Palustre group인 섬쥐손이와 가까이 위치하였으나 그 지지도는 매우 낮았고(37% bootstrap과 44% jackknife values) strict tree에서는 clade가 붕괴되었다. Wilfordii group에 분류되었던 큰세잎쥐손이는 Koreanum group과 가까이 위치하였고, Sibiricum group인 쥐손이풀은 Krameri group인 삼쥐손이와 가까이 위치하였으며 또한 이 두 종은 역시 Krameri group인 선이질풀과 자매군을 이루었다. Wilfordii group인 좀쥐손이와 세잎쥐손이는 Sibiricum group인 삼이질풀, 이질풀과 가까이 위치하였다. 이와 같은 결과는 많은 학자들에 의해 논란이 된 분류군들의 문제를 해결하는데 유용한 접근방법이라 생각되며, 전체 쥐손이풀속 수준에서의 계통분석에 유용한 도구로 이용될 수 있을 것으로 판단된다.

Keywords

Acknowledgement

Supported by : 영남대학교

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