Korean Journal of Plant Taxonomy (식물분류학회지)

The Korean Society of Plant Taxonomists (한국식물분류학회)
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Systematic Study on the Aconitum alboviolaceum Complex (Ranunculaceae) in Korea

한국산 줄바꽃 종집단의 분류학적 연구

  • Lee, Soo-Rang (Lake Sihwa Environmental Research Center, Korea Water Resources Corporation) ;
  • Park, Chong-Wook (National Institute of Biological Resources)
  • 이수랑 (한국수자원공사 시화호환경연구소) ;
  • 박종욱 (환경부 국립생물자원관)
  • Received : 2007.08.02
  • Accepted : 2007.12.24
  • Published : 2007.12.31
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Abstract

The Aconitum alboviolaceum Kom. complex includes four controversial species described from Korea; A. albouiolaceum, A. pseudolaeue, A. longecassidatum, and A. quelpaertense. The main objective of this study was to determine the taxonomic identities and systematic relationships among the species in the A. albouiolaceum complex based on morphology, numerical analyses and DNA sequence analysis. In the present study, variations in the principal morphological characters and chloroplast DNA noncoding region sequences (psbA-trnH IGS, trnL intron, and trnL-trnF IGS) were examined for 95 individuals from 20 populations. Also, neighbor-joining analysis was adopted to infer their relationships. Morphological variation appeared to be considerably high but not to be related to geographic distribution. These morphological results suggest that reevaluation of key morphological characters are needed for the proper taxonomic treatment of the complex. The length of psbA-trnH IGS region ranged from 241 to 250 bp, that of the trnL intron from 526 to 532 bp, and that of the trnL-trnF IGS region from 466 to 472 by in all taxa. Nine haplotypes were recognized from the analysis. Seven populations shared more than two haplotypes, while other thirteen populations shared only one haplotype. In the phylogenetic analysis, the nine haplotypes formed four groups, separated A. sibiricum, one of the sister groups of the complex. There also was no distinct grouping pattern supporting the species and populations observed. These results suggest that introgression or speciation might have been involved in the formation of taxa of A. alboviolaceum complex.

본 연구에서는 Aconitum alboviolaceum Kom. complex에 속하는 6종 중 한국산 4종(A. alboviolaceum, A. longecassidatum, A. pseudolaeve, A. quelpaertense)을 대상으로 형 태 및 주성분분석(Principal Components Analysis)과 엽록체 DNA psbA-trnH IGS, trnL intron 및 tmL-trnF IGS 구간의 분석을 통해 각 분류군의 타당성을 검토하고 그 한계 및 분류학적 위치를 명확히 설정하고자 하였다. 형태분석 결과, 기존에 보고되었던 주요 식별형질에서 형태변이가 종 및 개체군 수준에서 복잡한 형태로 나타났으며 주성분분석 결과 각 분류군들은 종 및 개체군 수준에서 유집 되지 않고 연속적으로 혼합된 양상을 보였다. 염기서열 분석 결과, l0개의 염기치환과 3개의 indel이 관찰되었고, 이를 통해 얻어진 neighbor-joining tree에서 나타난 4개의 그룹은 종 및 개체군을 반영하지 않았다. 따라서, 본 연구에서는 complex 내 분류군들에 관한 기존의 형태형질에 근거한 분류체계를 지지하지 않으며, 이들 분류군 간의 분류체계에 대한 재고가 필요하다고 본다.

Keywords

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