Phylogenetic relationships within Plantago (Plantaginaceae):: evidence from nuclear ribosomal ITS and plastid trnL-F sequence data
Phylogenetic relationships within Plantago (Plantaginaceae):: evidence from nuclear ribosomal ITS and plastid trnL-F sequence data
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DOI：
10.1046/j.1095-8339.2002.00070.x
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发表时间：
2002-08-01
影响因子：
2.4
通讯作者：
Bello, MA
中科院分区：
文献类型：
--
作者：
Ronsted, N;Chase, MW;Bello, MA
车前草属植物的分子系统学研究。（Plantinaceae）分析了核核糖体和质体trnL-F区域的内部转录间隔区（ITS）中的核苷酸变异。包括57种车前属植物，其中2种Aragoa属植物为内群，3种Veronica属植物为外群。系统发育分析，采用最大简约法确定了五个主要的分支，对应的分类群体车前亚属车前，冠，Psyllium，Littorella和Bougueria。Aragoa是Plantago属的姐妹。车前亚属Littorella是车前属其他亚属的姐妹属。结果是在一般相关的形态系统发育研究和环烯醚萜苷模式，但车前亚属Albicans是并系的，应包括在车前亚属Psyllium广义获得一个单系分支6节。车前组Hyplussyllium与组Gnaphaloides比与组Albicans更接近。车前亚属（PlantagosubgenusBougueria）与车前亚属（Psylliums.l.）车前亚属Coronopus组分为两个系。只有一部分可以分解成系列。车前属内的DNA变异很高，这是一个基于相对定型的形态学无法预测的结果。如果我们根据南印度洋新阿姆斯特丹特有的R stauntoni的分歧校准分子钟，我们计算出车前草和阿拉戈亚之间的分裂时间为710万年前，这与化石记录一致。(C)2002年，伦敦林奈学会。
A molecular phylogenetic study of Plantago L. (Plantaginaceae) analysed nucleotide variation in the internal transcribed spacers (ITS) of nuclear ribosomal and plastid trnL-F regions. Included are 57 Plantago species, with two Aragoa species as the ingroup and three Veronica species as the outgroup. Phylogenetic analysis using maximum parsimony identified five major clades, corresponding to the taxonomic groups Plantago subgenera Plantago, Coronopus, Psyllium, Littorella and Bougueria. Aragoa is sister to genus Plantago. Plantago subgenus Littorella is sister to the other subgenera of Plantago. The results are in general correlated with a morphological phylogenetic study and iridoid glucoside patterns, but Plantago subgenus Albicans is paraphyletic and should be included in Plantago subgenus Psyllium sensu lato to obtain a monophyletic clade with six sections. Plantago section Hymenopsyllium is more closely related to section Gnaphaloides than to section Albicans. Plantago subgenus Bougueria is sister to subgenus Psyllium s.l. section Coronopus in Plantago subgenus Coronopus is subdivided in two series. Only some of the sections can be resolved into series. DNA variation within genus Plantago, is high, a result that would not have been predicted on the basis of morphology, which is relatively stereotyped. If we calibrate a molecular clock based on the divergence of R stauntoni, endemic to New Amsterdam in the southern Indian Ocean, we calculate the time of the split between Plantago and Aragoa to be 7.1 million years' ago, which is congruent with the fossil record. (C) 2002 The Linnean Society of London.