Phylogenetics of Papaver and related genera based on DNA sequences from ITS nuclear ribosomal DNA and plastid trnL intron and trnL-F intergenic spacers
Phylogenetics of Papaver and related genera based on DNA sequences from ITS nuclear ribosomal DNA and plastid trnL intron and trnL-F intergenic spacers
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DOI：
10.1093/aob/mcl079
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发表时间：
2006-07-01
期刊：
影响因子：
4.2
通讯作者：
Hodkinson, Trevor R.
中科院分区：
文献类型：
--
作者：
Carolan, James C.;Hook, Ingrid L. I.;Hodkinson, Trevor R.
研究背景和目的：本研究以罂粟属、罗梅里亚属、柱花草属和绿绒蒿属的代表植物为研究对象，探讨了罂粟属与这些近缘植物的系统发育关系。方法：genera.center利用18 S-26 S核核糖体DNA的内转录间隔区（ITS）和质体的trnL内含子和trnL-trnF基因间间隔区的序列DNA.center。关键结果简约分析表明，该属是不是单系，除非密切相关的Roemeria，Stylomecon和Meconopsis cambrica包括在罂粟的修订的界限。三个不同的分支，解决了在一个组合的ITS和trnL-F分析。分支1由罂粟绿绒蒿组和亚洲绿绒蒿组成。进化枝2含有一个在此被鉴定为罂粟的组，包括龙骨草属、木贼属、棘豆属、罂粟属、毛蕊花属、假毛蕊花属和Rhoeadium组。进化枝3由罂粟组Argemonidium和弯折罗梅属Roemeria refracta组成。许多诊断性插入缺失支持这些分组。第二分支，宗派。罂粟和Rhoeadium要么不是单系或缺乏证据支持他们的monophyly.center.结论这种分子分析的结果表明，一些形态特征，如镊合状蒴果开裂，暗或轻的花丝和无柄柱头盘已经平行出现。系统发育树与现有的罂粟属分类不一致，并提出了一个修订的分类。
center dot Background and Aims Representatives from Papaver, Roemeria, Stylomecon and Meconopsis were studied to elucidate phylogenetic relationships between Papaver and these closely allied genera.center dot Methods Two molecular data sets were used individually and combined and included sequences from the internally transcribed spacer region (ITS) of 18S-26S nuclear ribosomal DNA and the trnL intron and the trnL-trnF intergenic spacer region of plastid DNA.center dot Key Results Parsimony analysis demonstrated that the genus is not monophyletic unless the closely related Roemeria, Stylomecon and Meconopsis cambrica are included in a revised circumscription of Papaver. Three distinct clades are resolved in a combined ITS and trnL-F analysis. Clade 1 consists of Papaver sect. Meconella and Asian Meconopsis. Clade 2 contains a group here identified as Papaver s.s., comprising sections Carinatae, Meconidium, Oxytona, Papaver, Pilosa, Pseudopilosa and Rhoeadium. Clade 3 consists of Papaver sect. Argemonidium and Roemeria refracta. A number of diagnostic indels support these groupings. Within clade 2, sects. Papaver and Rhoeadium are either not monophyletic or lack evidence supporting their monophyly.center dot Conclusions The results of this molecular analysis indicate that a number of morphological characters such as valvate capsule dehiscence, dark or light filaments and sessile stigmatic discs have arisen in parallel. The phylogenetic trees are incongruent with the existing taxonomy of Papaver, and a revised classification is suggested.