The Genus Machaerium (Leguminosae) is More Closely Related to Aeschynomene Sect. Ochopodium than to Dalbergia: Inferences from Combined Sequence Data
The Genus Machaerium (Leguminosae) is More Closely Related to Aeschynomene Sect. Ochopodium than to Dalbergia: Inferences from Combined Sequence Data
复制标题
Machaerium 属（豆科）与 Aeschynomene 教派关系更密切。
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. B. Lovato
中科院分区：
文献类型：
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作者：
R. A. Ribeiro;M. Lavin;J. P. Lemos;C. V. M. Filho;F. R. dos Santos;M. B. Lovato
摘要利用叶绿体DNA trnL内含子和核核糖体DNA ITS/5.8S区的序列，对降香属、野桐属和七叶树属的系统发育关系进行了研究。一个简约和贝叶斯分析的个人和合并的数据解决了一个单系的黄檀是姐妹的一个分支，包括Aeschynomene节。Aeschynomene sect. Aeschynomene与Bryaspsis和Soemmeringia等属并系，它们共同是Dalbergia-Machaerium-Ochopodium分支的姐妹。这项研究确定了Aeschynomene属的不同谱系，并揭示了具有基固定托叶的物种（即，Ochopodium）也许应该列为一个独特的属。八足蕨属的物种具有一般的有光泽的果实形态，与马凯里属的独特的不裂的萨马拉形成对比。这一分析的结果在属下一级也有一些影响。黄檀属植物的有限取样。Triptolemea和Ecastaphyllum将它们视为单系的。与此相反，传统的Machaerium属下分类并没有表现出太多的协议与分子组。需要额外的采样Aeschynomene和Machaerium物种，其他DNA序列和形态学数据，以解决组的确切关系。Ochopodium Machaerium，以及验证Machaerium属下分类。
Abstract Phylogenetic relationships among the genera Dalbergia, Machaerium, and Aeschynomene were investigated with sequences from both the chloroplast DNA trnL intron and the nuclear ribosomal DNA ITS/5.8S region. A parsimony and Bayesian analysis of individual and combined data resolved a monophyletic Dalbergia that is sister to a clade comprising Aeschynomene sect. Ochopodium and Machaerium. Aeschynomene sect. Aeschynomene is paraphyletic with respect to genera such as Bryaspsis and Soemmeringia, which collectively are sister to the Dalbergia-Machaerium-Ochopodium clade. This study identifies the disparate lineages of the genus Aeschynomene and reveals that species with basifixed stipules (i.e., sect. Ochopodium) perhaps should be ranked as a distinct genus. Species of Ochopodium have the general lomented fruit morphology in contrast to the unique indehiscent samara fruits of Machaerium. The findings of this analysis also have some bearing at the infrageneric level. Limited sampling of Dalbergia sects. Triptolemea and Ecastaphyllum resolves them as monophyletic. In contrast, the traditional infrageneric classification of Machaerium does not show much agreement with molecular groups. Additional sampling of Aeschynomene and Machaerium species, other DNA sequences, and morphological data are needed to resolve the exact relationship of sect. Ochopodium to Machaerium, as well as validate the infrageneric classification of Machaerium.