基于nrDNA ITS和cpDNA trnL-F序列探讨薤白的系统地位

doi:10.7677/ynzwyj201514174

摘要/Abstract

摘要：

薤白 (Allium macrostemon) 是葱属中重要的药食同源种类，其系统地位和分类等级迄今尚无统一定论，一直存有争议。为了探讨其系统位置及其与相关类群的亲缘关系，本研究利用nrDNA ITS和cpDNA trnLF序列数据对该种及若干近缘类群进行了系统发育分析。基于贝叶斯法和最大简约法构建的系统树均表明薤白为一单系种，与多系的组Caerulea、Pallasia的部分种类有密切的系统发育关系，而与组Codonoprasum和Allium的种类关系疏远；结合总苞、花丝和子房等形态学特征，不支持将薤白划归Allium组或置于广义的Scorodon组。薤白可能代表一个新的组一级的类群，但尚待增加类群采样（尤其是中亚的种类）进一步研究。本文还在系统发育框架下探讨了中药薤白（Allii Macrostemonis Bulbus）的基源植物（薤白、藠头、棱叶韭和长梗韭）及Pallasia组部分物种的系统位置。

关键词: 葱属, 薤白, ITS, trnL-F, 系统位置

Abstract:

Allium macrostemon is an important medicinal and edible plant. Its systematic position and taxonmical classification remain controversial to date. To explore this issue, we reconstructed phylogenetic relationships among Amacrostemon and other related taxa using nrDNA ITS and cpDNA trnLF markers. The phylogenetic trees derived from Bayesian inference and maximumparsimony analysis showed that Amacrostemon is monophyletic, and has a close relationship with some species of polyphyletic sections Caerulea and Pallasia instead of sections Codonoprasum and Allium. The including of Amacrostemon within section Allium was not supported by both molecular data and morphological characters of spathe, filaments and ovary. Allium macrostemon should be included in a new section, however further studies using additional samples (especially those from Central Asia) is necessary. In addition, we also provided a discussion on the phylogenetic relationships among four original plants (Amacrostemon, Achinense, Acaeruleum and Aneriniflorum) of Allii Macrostemonis Bulbus and systematic position of partial species of section Pallasia.

Key words: Allium, A. macrostemon, ITS, trnL-F, Systematic position

中图分类号:

Q 949

黄德青, 李琴琴, 周颂东, 何兴金. 基于nrDNA ITS和cpDNA trnL-F序列探讨薤白的系统地位[J]. Plant Diversity, 2015, 37(05): 537-545.

HUANG De-Qing, LI Qin-Qin, ZHOU Song-Dong, HE Xing-Jin. Systematic Position of Allium macrostemon Based on nrDNA ITS and cpDNA trnL-F Sequence Data[J]. Plant Diversity, 2015, 37(05): 537-545.

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