Organelle Phylogenomics and Extensive Conflicting Phylogenetic Signals in the Monocot Order Poales.
Organelle Phylogenomics and Extensive Conflicting Phylogenetic Signals in the Monocot Order Poales.
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DOI：
10.3389/fpls.2021.824672
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发表时间：
2021
影响因子：
5.6
通讯作者：
Ma PF
中科院分区：
文献类型：
--
作者：
Wu H;Yang JB;Liu JX;Li DZ;Ma PF
禾本科是世界上最大的有花植物目之一，具有重要的经济和生态价值。重建禾本科植物的进化史对于理解其进化史是重要的，而这是生物学研究的基础。然而，由于稀疏的分类单元采样和有限的分子数据，以前的研究导致了各种矛盾的拓扑结构。特别是，有三个节点周围的不一致：系统发育的模糊性附近的根的禾本科，姐妹家庭的禾本科，和xyrid分支的划界。我们进行了全面的采样和重建系统发育树，分别从91至66分类群，代表所有16个科的禾本科植物的质体和线粒体基因组数据。我们的分析支持凤梨科和香蒲科作为禾本科最早分化的类群的发现，同时与多分支的系统发育关系。Ecdeiocoleaceae和Joinvilleaceae的分支恢复为禾本科的姐妹群。三个科，Mayacaceae，谷精草科，和Xyridaceae，xyrid组合，先后沿着的主干Poales的植物群，因此这个组合是并系的。令人惊讶的是，我们发现大量的系统发育冲突的质体基因组内的禾本科，以及之间的质体，线粒体和核数据。这些矛盾表明，禾本科植物可能有一个复杂的进化历史，如快速辐射和多倍体，特别是异源多倍体通过杂交。总之，我们的研究提出了一个新的洞察力到复杂的系统发育关系和潜在的系统发育冲突内的禾本科。
The Poales is one of the largest orders of flowering plants with significant economic and ecological values. Reconstructing the phylogeny of the Poales is important for understanding its evolutionary history that forms the basis for biological studies. However, due to sparse taxon sampling and limited molecular data, previous studies have resulted in a variety of contradictory topologies. In particular, there are three nodes surrounded by incongruence: the phylogenetic ambiguity near the root of the Poales tree, the sister family of Poaceae, and the delimitation of the xyrid clade. We conducted a comprehensive sampling and reconstructed the phylogenetic tree using plastid and mitochondrial genomic data from 91 to 66 taxa, respectively, representing all the 16 families of Poales. Our analyses support the finding of Bromeliaceae and Typhaceae as the earliest diverging groups within the Poales while having phylogenetic relationships with the polytomy. The clade of Ecdeiocoleaceae and Joinvilleaceae is recovered as the sister group of Poaceae. The three families, Mayacaceae, Eriocaulaceae, and Xyridaceae, of the xyrid assembly diverged successively along the backbone of the Poales phylogeny, and thus this assembly is paraphyletic. Surprisingly, we find substantial phylogenetic conflicts within the plastid genomes of the Poales, as well as among the plastid, mitochondrial, and nuclear data. These conflicts suggest that the Poales could have a complicated evolutionary history, such as rapid radiation and polyploidy, particularly allopolyploidy through hybridization. In sum, our study presents a new perspicacity into the complex phylogenetic relationships and the underlying phylogenetic conflicts within the Poales.
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影响因子：
10.7
作者：
Castresana, J
通讯作者：
Castresana, J
影响因子：
6.5
作者：
Baker WJ;Bailey P;Barber V;Barker A;Bellot S;Bishop D;Botigué LR;Brewer G;Carruthers T;Clarkson JJ;Cook J;Cowan RS;Dodsworth S;Epitawalage N;Françoso E;Gallego B;Johnson MG;Kim JT;Leempoel K;Maurin O;Mcginnie C;Pokorny L;Roy S;Stone M;Toledo E;Wickett NJ;Zuntini AR;Eiserhardt WL;Kersey PJ;Leitch IJ;Forest F
通讯作者：
Forest F
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作者：
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通讯作者：
Freudenstein, John V.
影响因子：
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作者：
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通讯作者：
Ming, Ray
影响因子：
6.5
作者：
Brown, Jeremy M.;Thomson, Robert C.
通讯作者：
Thomson, Robert C.