한국산 피나무속(Tilia L.) 식물의 분자 계통학적 연구
Molecular Phylogenetic Study of Korean Tilia L.
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초록
피나무속 식물은 화경의 아래에 부착된 선형의 포를 특징적으로 가지고 있으며 이러한 형질은 아욱과의 다른 속과 구분된다. 본 연구는 피나무속의 종간 계통학적 유연관계를 규명하고자 하였다. 계통학적 분석은 한국과 일본의 피나무속 10종,outgroup으로 멕시코목화를 선정하여 수행하였다. nrDNA의ITS와 cpDNA의 trnL-F, rpl32-trnL의 염기서열을 확보하여분석하였다. ITS, trnL-F 와 rpl32-trnL의 data를 유합한 결과계통수는 6개의 분계조로 구성되었다. 구주피나무는 outgroup 과 가장 가깝게 나타났다. 피나무 , 뽕잎피나무 그리고 털피나무는 한 분계조를 형성하였다. 연밥피나무, 섬피나무, 일본피나무는 각각 독립적인 분계조를 형성하였다. 섬피나무는 일본피나무와 가장 가까운 관계를 보여주었다. 보리자나무, 찰피나무, 염주나무는 하나의 분계조를 형성하여 서로 근연관계에 있음을 보여주었다.
Abstract
The genus Tilia is characterized by linear form bracts of which the lower part is attached to the peduncle of a cyme. This character is distinguished from the others genus of Malvaceae. The purpose of this study is verifying the phylogenetic relationship of genus Tilia. Phylogenetic analyses were conducted to evaluate relationships of 10 taxa of Tilia in Korea and Japan including one outgroup (Gossypium hirsutum). The molecular phylogenetic analyses were conducted with sequences based on ITS, trnL-F and rpl32-trnL region. The combined data result of ITS, trnL-F and rpl32-trnL was formed by 6 clades. T. kiusiana situated as the most basal clade. T. amurensis, T. taquetii and T. rufa are composed a clade. T. koreana, T. insularis and T. japonica was formed independent clade. T. insularis has the closest relationship with T. japonica. T. miqueliana, T. mandshurica, and T. megaphylla are composed a clade and showed a sister relationship than other species. Key words - Malvaceae, Phylogenetic analysis, rpl32-trnL, Tilia insularis
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