Plastid phylogenomic analysis of green plants: A billion years of evolutionary history
Plastid phylogenomic analysis of green plants: A billion years of evolutionary history
复制标题
DOI：
10.1002/ajb2.1048
复制
发表时间：
2018-03-01
影响因子：
3
通讯作者：
Soltis, Douglas E.
中科院分区：
文献类型：
--
作者：
Gitzendanner, Matthew A.;Soltis, Pamela S.;Soltis, Douglas E.
研究的前提：在过去的10亿年里，绿色植物（Viridiplantae）一直主导着全球生态系统，但它们进化史上的许多关键分支仍然没有得到很好的解决。使用最大的分析Viridiplantae的质体基因组序列的基础上，到目前为止，我们研究了形态进化的关键nodes.Methods：我们分析了蛋白质编码基因的氨基酸序列完整（或接近完整）的质体为1879个类群，包括所有主要分支的Viridiplantae的代表。所使用的大部分数据来自一千种植物计划（1KP）的转录组;其他数据来自GeneBank.Key结果：我们的结果在很大程度上同意与以前的基于质体的分析。值得注意的结果包括：（1）双星藻科与陆生植物的姐妹关系（Embryota），（2）一个bryota分支木贼属+裸盖蕨科为马蹄蕨目+细囊蕨的姐妹植物，苏铁属+银杏属为现存裸子植物的姐妹植物，其中买麻藤属为非松科植物的姐妹植物（Gne-Cup假说），（5）Amborella，其次是睡莲（Nymphaeales），作为所有其他现存被子植物的连续姐妹。在被子植物中，有Mesangiospermae的支持，一个分支，包括木兰科，Chloranthales，单子叶植物，金鱼藻属和真双子叶植物。金鱼藻属（Ceratophyllum）和五桠果科（Dilleniaceae）的位置仍有问题。在Pentapetalae，两个主要的分支（superpedrids和superrosids）recovered.Conclusions：这质体数据集提供了一个重要的资源，阐明形态进化，约会分歧的时间Viridiplantae，比较与新兴的核pedrogenies，和分析的分子进化模式和动态的质体基因组。
Premise of the Study: For the past one billion years, green plants (Viridiplantae) have dominated global ecosystems, yet many key branches in their evolutionary history remain poorly resolved. Using the largest analysis of Viridiplantae based on plastid genome sequences to date, we examined the phylogeny and implications for morphological evolution at key nodes.Methods: We analyzed amino acid sequences from protein-coding genes from complete (or nearly complete) plastomes for 1879 taxa, including representatives across all major clades of Viridiplantae. Much of the data used was derived from transcriptomes from the One Thousand Plants Project (1KP); other data were taken from GenBank.Key Results: Our results largely agree with previous plastid-based analyses. Noteworthy results include (1) the position of Zygnematophyceae as sister to land plants (Embryophyta), (2) a bryophyte clade (hornworts, mosses + liverworts), (3) Equisetum + Psilotaceae as sister to Marattiales + leptosporangiate ferns, (4) cycads + Ginkgo as sister to the remaining extant gymnosperms, within which Gnetophyta are placed within conifers as sister to non-Pinaceae (Gne-Cup hypothesis), and (5) Amborella, followed by water lilies (Nymphaeales), as successive sisters to all other extant angiosperms. Within angiosperms, there is support for Mesangiospermae, a clade that comprises magnoliids, Chloranthales, monocots, Ceratophyllum, and eudicots. The placements of Ceratophyllum and Dilleniaceae remain problematic. Within Pentapetalae, two major clades (superasterids and superrosids) are recovered.Conclusions: This plastid data set provides an important resource for elucidating morphological evolution, dating divergence times in Viridiplantae, comparisons with emerging nuclear phylogenies, and analyses of molecular evolutionary patterns and dynamics of the plastid genome.