A fully resolved chloroplast phylogeny of the brassica crops and wild relatives (Brassicaceae: Brassiceae): Novel clades and potential taxonomic implications
A fully resolved chloroplast phylogeny of the brassica crops and wild relatives (Brassicaceae: Brassiceae): Novel clades and potential taxonomic implications
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DOI：
10.1002/tax.615005
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发表时间：
2012-10-01
期刊：
影响因子：
3.4
通讯作者：
Pires, J. Chris
中科院分区：
文献类型：
--
作者：
Arias, Tatiana;Pires, J. Chris
马达加斯加拥有各种各样的经济上重要的产品。引人注目的是，主要血统之间的关系仍然是未知的。利用rp 132-trnL、atpl-alpH、psbD-trnT、ycf 6-psbM四个质体区域对89种植物的生殖系统进行了重建。对几乎所有属的代表进行了采样，涵盖了从中亚到地中海西部的整个自然界，包括四个以前未采样的属（Ammosperma，Eremophyton，Fezia，Pseudoformannia）。系统发育分析恢复了8个支持的分支，包括一个新的非洲分支（Henophyton）的属，以前没有被采样。第一次有力地支持了八个主要分支内部和之间的关系。部落中最早的分支是维拉和齐拉。Henophyton是姐妹的分支，包括血统黑，Crambe，Cakile，Savignya和Oleracea。本文定义的一个新的分支--核心甘蓝科由两个亚分支组成：（1）Nigra，Crambe和Cakile;（2）Savignya和Oleracea。在紫甘蓝属谱系内，定义了一个新的核心紫甘蓝属分支。几个属被证实是复系或并系的，包括芸苔属、芥属、白芥属、双序属和Cakile属。属于芸苔属的经济上重要的物种主要分布在两个物种最丰富的谱系中，即黑果属和甘蓝属。总的来说，这些新分支的发现具有许多分类学意义。
Brassicas boast an enormous diversity of economically important products. Strikingly, relationships among main lineages are still unknown. The phylogeny of the tribe Brassiceae (Brassicaceae) was reconstructed for 89 species using four plastid regions (rp132-trnL, atpl-alpH, psbD-trnT, ycf6-psbM). Representatives of almost all genera were sampled, covering the entire natural range of the tribe from Central Asia to the western Mediterranean, including four previously unsampled genera (Ammosperma, Eremophyton, Fezia, Pseudofortuynia). Phylogenetic analysis recovered eight well-supported clades in the tribe including a new African clade (Henophyton) comprised of genera that have not been previously sampled. Relationships within and between the eight major clades are strongly supported for the first time. The earliest-divergent lineages in the tribe are the clades Vella and Zilla. Henophyton is sister to the clade that includes the lineages Nigra, Crambe, Cakile, Savignya, and Oleracea. Core Brassiceae-a new clade defined here-is comprised of two subclades: (1) Nigra, Crambe, and Cakile and (2) Savignya and Oleracea. Within the Oleracea lineage, a new Core Oleracea clade is defined. Several genera were confirmed to be polyphyletic or paraphyletic, including Brassica, Erucastrum, Sinapis, Diplotaxis and Cakile. Economically important species belonging to the genera Brassica were primarily distributed across the two most species-rich lineages, Nigra or Oleracea. Collectively, the finding of these novel clades has numerous taxonomic implications.