Phylogenetics and evolution of phyllotaxy in the Solomon's seal genus Polygonatum (Asparagaceae: Polygonateae)
Phylogenetics and evolution of phyllotaxy in the Solomon's seal genus Polygonatum (Asparagaceae: Polygonateae)
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所罗门海豹属黄精（天冬科：黄精科）的系统发育和叶序进化
DOI：
10.1111/boj.12218
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发表时间：
2014-12-01
影响因子：
2.4
通讯作者：
Yang, Yong-Ping
中科院分区：
文献类型：
--
作者：
Meng, Ying;Nie, Ze-Long;Yang, Yong-Ping
黄精属是黄精族中最大和最复杂的属，约有57种，广泛分布于北方半球的暖温带、亚热带和寒带。然而，该属的系统发育关系仍然知之甚少。本研究的目的是重建该属的系统发育关系，使用4个质体标记，并检查其密切相关的分类群的系统发育背景下，在黄精属的叶排列的进化。以30种黄精属植物为研究对象，采用最大似然法和贝叶斯法分析其系统发育关系。使用贝叶斯、简约和似然方法重建了叶排列的进化。系统发育分析支持当前黄精属的划分，异黄精属被认为是一个独立的属。黄精属的三个主要谱系得到了很好的支持，在很大程度上与地理分布和最新的分类在组水平。然而，我们的研究结果并不支持目前公认的系列，特别是两个大系列Verticillata和Alternifolia.Bayesian分析支持交替叶安排的祖先状态黄精，但简约和最大似然分析表明，一个模棱两可的状态冠黄精。叶排列被认为是进化不稳定。本文提出一个新的命名组合：黄精组Sibirica（L. I. Abramova）Y.Meng，comb. nov. (c)2014年，伦敦林奈学会，林奈学会植物学杂志，2014年，176，435-451。
Polygonatum is the largest and most complex genus in tribe Polygonateae, comprising approximately 57 species widely distributed in the warm temperate, subtropical and boreal zones of the Northern Hemisphere. However, phylogenetic relationships in the genus remain poorly understood. The objectives of this study were to reconstruct the phylogenetic relationships of the genus using four plastid markers, and to examine the evolution of leaf arrangement in Polygonatum in the phylogenetic context of its closely related taxa. Thirty Polygonatum species were sampled to infer phylogenetic relationships using maximum-likelihood and Bayesian analyses. The evolution of leaf arrangements was reconstructed using Bayesian, parsimony and likelihood methods. The phylogenetic analyses supported the current generic delimitation of Polygonatum, with Heteropolygonatum recognized as a distinct genus. Three major lineages in Polygonatum were well supported, largely correlated with geographical distribution and the most recent classification at the sectional level. However, our results did not support the currently recognized series, especially the two large series Verticillata and Alternifolia.Bayesian analyses support the alternate-leaf arrangement as the ancestral state for Polygonatum, but parsimony and maximum-likelihood analyses suggest an equivocal state for crown Polygonatum. Leaf arrangement was found to be evolutionarily labile. A new nomenclatural combination was made: Polygonatum sectionSibirica (L.I.Abramova) Y.Meng, comb. nov.(c) 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 176, 435-451.