Abstract

Phylogenetic relationships within Astragalus sect. Acanthophace and several spiny Astragalus species were studied using nuclear ribosomal DNA internal transcribed spacer (nrDNA ITS) and two plastid intergenic spacers (rpl32-trnL^(UAG) and trnS^(GCU)–trnG^(UCC)). The strongly congruent expression using maximum likelihood and Bayesian inference methods was the non-monophyly of sect. Acanthophace at the current status suggesting the exclusion of A. ovigerus and A. lamprocarpus as a single clade. This study also shed light on taxonomic controversies on the synonymy of A. lamprocarpus under A. ovigerus and indicated the non-monophyly of A. lycioides complex, since one accession of A. lycioides (sect. Acanthophace) united with members of A. sect. Aegacantha (resurrected as A. pseudoangustifolius). Another interesting finding was the unexpected placement of A. montis-parrowii (sect. Aegacantha) within the bulk of spiny Astragalus (Astracantha clade). The reconstructed plastid and nrDNA ITS trees showed considerable conflict in the position of several species. Biogeographical analyses indicated that sect. Acanthophace was most probably originated in western Iran.

摘要

在黄芪属内的系统发育关系。用棘状核糖体DNA内部转录间隔子（nrDNA ITS）和两个质体基因间隔子（rpl 32 -trn L ^（UAG）和trn S ^（GCU） – trn G ^（UCC））研究了棘皮动物和一些棘生的黄芪物种。使用最大似然和贝叶斯推断方法的强一致表达是该教派的非单调性。Acanthophace在当前状态提示排除A. ovigerus和A. lamprocarpus作为一个单一的分支。本研究还上的同义分类学争议阐明A. lamprocarpus下A. ovigerus和指示的非单系A. lycioides复杂的，因为一个加入A. lycioides（第Acanthophace与成员联）甲。教派。Aegacantha（复活为甲。pseudoangustifolius）。另一个有趣的发现是，在多刺的黄芪（Astracantha）的主体内意外地放置了A. montis-parrowii（Aegacantha）。进化枝）。重建的质体树和nrDNA ITS树在几种物种的位置上显示出很大的冲突。生物地理学分析表明该教派。棘齿龙很可能起源于伊朗西部。