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Phylogeny of basal monocotyledons -as the first step to an investigation on non-synchronism between phenotype evolution and genotype evolution-

基础单子叶植物的系统发育 -作为研究表型进化和基因型进化之间不同步性的第一步-

基本信息

批准号：
11640701
负责人：
TAMURA Minoru N.
金额：
$ 2.3万
依托单位：
Osaka City University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

In the present study, first, we revealed that a molecular phylogenetic tree based on DNA sequences of plastid matK gene provides much better resolution of major evolutionary relationships of the monocotyledons than a molecular phylogenetic tree based on DNA sequences of plastid rbcL gene. Second, using DNA sequences of both matK and rbcL genes, we constructed the molecular phylogenetic tree that provides the best resolution of major evolutionary relationships of the monocotyledons among molecular phylogenetic trees published until the present time as far as I know. And, we proved that Liliaceae are not monophyletic and can be divided into at least five lineages, i.e., Liliales, Asparagales, Tofieldiaceae, Nartheciaceae, and Petrosavia-group. In the matK + rbcL tree of the monocotyledons, Acorales is diverged as the first branch, followed successively by Alismatales-group (including Tofieldiaceae), Petrosavia-group, Dioscoreales-group (including Nartheciaceae), Liliales, Asparagales, an … More d Commelinales-group. And, we established a framework of a new classification of the monocotyledons based on molecular information.Next, we reexamined taxonomy of the Tofieldiaceae, which are one of the most morphologically primitive monocotyledonous families and are important in considering the ancestral morphology of the monocotyledons. And, we concluded that the Isidrogalvia, which has fully connate carpels, should be transferred from the Tofieldiaceae to Nartheciaceae. After this transfer, the Tofieldiaceae correspond only to plants with almost free carpels, and the morphological primitiveness of the Tofieldiaceae became more definitive. The calyculus, which the Tofieldiaceae and Isidrogalvia share, turned out to have evolved in parallel in the lineages of Tofieldiaceae and Nartheciaceae.Further, we revealed relationships among families, genera and species of the Convallariaceae (Asparagales) and their allied families, in which the taxonomy was quite controversial and the chromosomal characters are highly diversified, and estimated the direction of evolution of the chromosome numbers and karyotypes. Less

在本研究中，首先，我们发现，分子系统发育树的基础上的质体matK基因的DNA序列提供了更好的分辨率比分子系统发育树的基础上的质体rbcL基因的DNA序列的单子叶植物的主要进化关系。其次，利用matK和rbcL基因的DNA序列，我们构建了分子系统发育树，提供了最好的分辨率的主要进化关系的单子叶植物的分子系统发育树发表到目前为止，据我所知。证明了百合科不是单系的，至少可以分为五个谱系，即：百合目、天门冬目、石楠科、水仙科、岩蔷薇属。在单子叶植物matK + rbcL树状图中，菖蒲目（Acorales）是第一个分支分支，其次是泽泻目（Alismatales）（包括石楠科（Tofieldiaceae）、油桐目（Petrosavia）、菊科（包括水仙科（Nartheciaceae）、百合目（Liliales）、天门冬目（Asparagales）、石楠科（Pastravia）、百合目（Liliales）、石楠科（Pastravia）、 ...更多信息 d Commelinales集团。其次，我们对形态学上最原始的单子叶植物科之一的托菲尔科（Tofieldiaceae）的分类进行了重新研究，托菲尔科在单子叶植物的祖先形态学研究中具有重要意义。同时，我们认为，具有完全合生心皮的Isidrogalvia应该从Tofieldiaceae转移到Nartheciaceae。在这种转移之后，Tofieldiaceae仅对应于具有几乎游离心皮的植物，并且Tofieldiaceae的形态学连续性变得更加确定。研究结果表明，鹅掌楸科和桐花藤科的花萼是平行进化的，并揭示了铃兰科科的科、属、种之间的关系（Asparagales）及其近缘科，其中的分类是相当有争议的，染色体特征是高度多样化的，并估计了染色体数目和核型的进化方向。少