黄芪属植物系统发育及形态特征的进化。基于nrDNA ITS和rpl32-trnLUAG序列的伊朗棘皮病和棘皮病

Z. Khalili, S. Kazempour-Osaloo, A. Maassoumi
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引用次数: 1

摘要

本研究主要研究黄芪属植物形态特征的系统发育关系及进化趋势。采用nrDNA-ITS和rpl32-trnL-UAG数据集对棘皮病和盾皮病进行了研究,并以黄芪为外群。系统发育结果表明A.sect属非单系。由于A.ovigerus被远远排除在核心群之外,以及基于后一物种在所产生的系统发育树中的不同位置,细胞核和质体数据集之间的不一致,导致目前范围内的棘突性。黄芪属。Aeacantha也被发现不是单系的,因为A.montis parrowii与该剖面的其他代表相距遥远,同时与其他多刺黄芪属物种相伴。在贝叶斯组合树上对32个形态特征进行了优化,结果表明,一些特征对棘皮和盾皮分类群的划分最为有用。从性状的演变中得到的结果表明,标准的叶片收缩,位置为A.montis parrowii,与其他教派成员分离。Aeacantha在花序中的花数、花序梗的存在、有毛的花瓣、宽硬质标准的存在和分化为爪的标准的收缩、标准中爪的存在以及龙骨与翅膀的长度差等方面与该教派其他成员不同。Aeacantha。
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Phylogeny and morphological traits evolution of Astragalus sects. Acanthophace and Aegacantha in Iran on the basis of nrDNA ITS and rpl32-trnLUAG sequences
. In this study, phylogenetic relationships and evolutionary trends of morphological characters of Astragalus sects. Acanthophace and Aegacantha were studied using nrDNA ITS and rpl 32- trn L UAG datasets while Astragalus stocksii was selected as the outgroup. The phylogenetic results indicated the non-monophyly of A. sect. Acanthophace in its current circumscription due to the distant exclusion of A. ovigerus from the core group, and incongruence between nuclear and plastid datasets on the basis of different position of latter species in the resulted phylogenetic trees. Astragalus sect. Aegacantha was also found to not being monophyletic due to the distant position of A. montis-parrowii from the other representatives of the section while accompanying with other spiny Astragalus species . The Optimization of 32 morphological characters on the Bayesian combined tree indicated that some characters were most useful for delimitation of taxa in sections Acanthophace and Aegacantha . The results obtained from the evolution of characters showed that standard blade constriction, position of A. montis-parrowii , which was separated from other members of sect. Aegacantha , as the number of flowers in inflorescences, the presence of peduncle, hairy petal, pandurate standard and constriction of standard that is differentiatiated to claw, the presence of claw in standard and the length difference between keel and wing were different from those in other members of the sect. Aegacantha .
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