Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae
Phylogenetic lineages and the role of hybridization as driving force of evolution in grass supertribe Poodae
复制标题
草类超部落普科的系统发育谱系和杂交作为进化驱动力的作用
作者：
Schneider;Döring;Hochbach;Nissen;Winterfeld;Gabriel;Hoffmann;Röser
为了研究禾本科禾本科（禾本科、禾本科亚科）的进化多样性和形态进化，我们进行了全面的分子系统发育分析，包括大多数公认属的代表。我们专注于生成 plastidmatKgene–3′trnKexon 和 trnL-trnF 区域以及核核糖体 (nr) ITS1–5.8S 基因–ITS2 和 ETS 的 DNA 序列数据集，该数据集在分类学上尽可能完全重叠（总共 257 个物种）。这个想法是基于质体和 nrDNA 数据来推断系统发育树或某些进化枝是否相互对应或不一致，从而揭示过去杂交的特征。通过排除各个基因树中位置不一致的类群以及这些类群的重复（每个重复只有一个数据分区（质体或 nrDNA）），对数据集进行单独和组合分析。我们使用了最大似然法、最大简约法和贝叶斯方法。来自两个数据集的系统发育树之间存在严重冲突的实例（其中一些先前已经注意到）指出了多个谱系的混合起源，例如包含多个亚族和下级进化枝的 ABCV 进化枝，Airinae 亚族、Anthoxanthinae、Antinoriinae、subtr 亚族。十一月，Aristaveninae，Avenulinae，subtr。十一月，Helictochloinae，subtr。 nov.、Holcinae、Phalaridinae、Scolochloinae、Sesleriinae、Torreyochloinae 和 Arctopoa、Castellia、Graphephorum、Hyalopodium、Lagurus、Macrobriza、Puccinelliaplus Sclerochloa、Sesleria、Tricholemma、Tzveleviochloa 等属。“Calamagrostis”flavens 似乎是属间杂种介于股须草和藤蔓之间。排除所有具有明显细胞核不一致的谱系的分析揭示了 Poodae 中三个受支持的主要进化枝，它们同时存在于质体和 nrDNA 树中。它们的描述完全一致，但在系统发育上的排列不同，表明其中之一的杂交起源。我们建议将这些主要分支视为单独的部落燕麦科（Aveneae）、早熟禾科（Poeae s.str）。和羊茅科，其质体中的燕麦科（Poeae，Festuceae）与nrDNA树中的羊茅科（Aveneae，Poeae）具有系统发育排列。质体和核标记的系统发育不一致延伸到普罗科的所有等级分类水平，从物种（此处未研究）到属、亚族和部落，因此是最深的分类水平，强调了这一大类草类中网状进化的巨大意义。提出了部分修订的分类，包括引入新的羊茅科部落和恢复燕麦科部落。在对优选单系亚族进行相对狭窄的划分之后，Antinoriinae、Avenulinae、Brizochloinae、Helictochloinae 和 Hypseochloinae 被描述为新的。新属是Arctohyalopoa 和Hyalopodium。新组合是Anthoxanthum glabrum subsp.sibiricum、A. Nitenssubsp.kolymense,Arctohyalopoa ivanovae,A.尤尔兹维伊，A.拉纳提弗洛拉，A.莫米卡，Colpodium biebersteinianum，C. kochii,C.pisidicum,C.毛足属，C.轮叶草、杜邦草、羊茅、F.知更鸟，Graphephorum canescens，G. cernuum、Hyalopodium araraticum、Paracolpodium baltistanicum、Parapholis cylindrica、P. ×pauneroi.Festuca dolichathera 和 F. masatierraare 新名字。
To investigate the evolutionary diversification and morphological evolution of grass supertribe Poodae (subfam. Pooideae, Poaceae) we conducted a comprehensive molecular phylogenetic analysis including representatives from most of its accepted genera. We focused on generating a DNA sequence dataset of plastidmatKgene–3′trnKexon andtrnL‐trnFregions and nuclear ribosomal (nr) ITS1–5.8S gene–ITS2 and ETS that was taxonomically overlapping as completely as possible (altogether 257 species). The idea was to infer whether phylogenetic trees or certain clades based on plastid and nrDNA data correspond with each other or discord, revealing signatures of past hybridization. The datasets were analysed separately, in combination, by excluding taxa with discordant placements in the individual gene trees and with duplication of these taxa in a way that each duplicate has only one data partition (plastid or nrDNA). We used maximum likelihood, maximum parsimony and Bayesian approaches. Instances of severe conflicts between the phylogenetic trees derived from both datasets, some of which have been noted earlier, point to hybrid origin of several lineages such as the ABCV clade encompassing several subtribes and subordinate clades, subtribes Airinae, Anthoxanthinae, Antinoriinae, subtr. nov., Aristaveninae, Avenulinae, subtr. nov., Helictochloinae, subtr. nov., Holcinae, Phalaridinae, Scolochloinae, Sesleriinae, Torreyochloinae and generaArctopoa,Castellia,Graphephorum,Hyalopodium,Lagurus,Macrobriza,PuccinelliaplusSclerochloa,Sesleria,Tricholemma,Tzveleviochloa, etc. ‘Calamagrostis’flavensappears to be an intergeneric hybrid betweenAgrostisandCalamagrostis. Analyses excluding all lineages with demonstrably cytonuclear discordance revealed three supported main clades within Poodae that were present in both the plastid and nrDNA trees. They fully corresponded in their delineation but were phylogenetically differently arranged, pointing to hybrid origin of one of them. We propose to consider these main clades in classification as separate tribes Aveneae, Poeae s.str. and Festuceae with a phylogenetic arrangement of Aveneae(Poeae,Festuceae) in plastid versus Festuceae(Aveneae,Poeae) in nrDNA trees. Phylogenetic incongruence of the plastid and nuclear markers extends across all hierarchical taxonomic levels of Poodae, ranging from species (not studied here) to genera, subtribes and tribes, therefore the deepest taxonomic levels, emphasizing the enormous significance of reticulate evolution in this large group of grasses. A partly revised classification is presented, including the introduction of a new tribe Festuceae and a re‐instatement of tribe Aveneae. Following a comparatively narrow delineation of preferably monophyletic subtribes, Antinoriinae, Avenulinae, Brizochloinae, Helictochloinae and Hypseochloinae are described as new. New genera areArctohyalopoaandHyalopodium. New combinations areAnthoxanthum glabrumsubsp.sibiricum,A. nitenssubsp.kolymense,Arctohyalopoa ivanovae,A. jurtzevii,A. lanatiflora,A. momica,Colpodium biebersteinianum,C. kochii,C.pisidicum,C. trichopodum,C. verticillatum,Dupontia fulva,Festuca masafuerana,F. robinsoniana,Graphephorum canescens,G. cernuum,Hyalopodium araraticum,Paracolpodium baltistanicum,Parapholis cylindrica,P. ×pauneroi.Festuca dolichatheraandF. masatierraeare new names.
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新世界草类（禾本科）目录：IV。
DOI：
--
发表时间：
2003
期刊：
影响因子：
--
作者：
R. Soreng
通讯作者：
R. Soreng
影响因子：
1.9
作者：
J. Schneider;G. Winterfeld;M. Hoffmann;M. Röser
通讯作者：
J. Schneider;G. Winterfeld;M. Hoffmann;M. Röser
南美冷季草属 Chascolytrum（禾本科、早熟禾亚科）系统发育进展：一种新的属下分类
影响因子：
2.4
作者：
Leonardo Nogueira da Silva;L. Essi;J. Iganci;T. Souza
通讯作者：
T. Souza
影响因子：
3
作者：
Cheng, Yajuan;Zhou, Kai;Huang, Linkai
通讯作者：
Huang, Linkai
地中海及邻近地区草属Helictotrichon（禾本科：燕麦科）的生态地理学
影响因子：
1.9
作者：
M. Röser
通讯作者：
M. Röser