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首页> 外文期刊>Molecular phylogenetics and evolution >Towards a more robust molecular phylogeny of Chinese Apiaceae subfamily Apioideae: Additional evidence from nrDNA ITS and cpDNA intron (rpl16 and rps16) sequences
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Towards a more robust molecular phylogeny of Chinese Apiaceae subfamily Apioideae: Additional evidence from nrDNA ITS and cpDNA intron (rpl16 and rps16) sequences

机译：建立更强大的中国伞形科亚科的分子系统发育：来自nrDNA ITS和cpDNA内含子（rpl16和rps16）序列的其他证据

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China contains some of the world's greatest diversity of Apiaceae (Umbelliferae), with ten endemic genera. Our previous investigation into the phylogenetic relationships of Chinese Apiaceae subfamily Apioideae, based exclusively on nrDNA ITS sequences, revealed several major clades heretofore unrecognized in the subfamily and confirmed the phylogenetic placements of five endemic genera. To further elucidate relationships among Chinese Apioideae, ascertain the phylogenetic placements of the remaining endemic genera, and test hypotheses of relationships proposed in our earlier study, additional taxa were examined for ITS and, for smaller sets of accessions, cpDNA rpl16 and rps16 intron sequence variation. These ITS and cpDNA data matrices comprised 158 and 131 accessions, respectively, with 110 accessions included in the analysis of combined ITS and cpDNA data. Maximum parsimony and Bayesian analyses of partitioned ITS and chloroplast data sets resulted in highly consistent phylogenies, whereas analyses of combined molecular data resulted in trees of greatest resolution and overall branch support. Two major clades identified in our previous study are recognized at the tribal level: Komarovieae J. Zhou & S. R. Downie trib. nov. and Chamaesieae J. Zhou & F. D. Pu trib. nov. The monotypic tribe Chamaesieae represents one of the earliest diverging lineages of subfamily Apioideae in Asia. The Acronema and East Asia clades of previous circumscription are each expanded. Of the five Chinese endemic genera not examined previously, Chaerophyllopsis finds affinity within tribe Scandiceae subtribe Scandicinae, Chuanminshen allies with Changium and Cyclorhiza in tribe Komarovieae, Harrysmithia falls within the Acronema Clade, Melanosciadium embeds in Angelica in tribe Selineae, and Dickinsia is confirmed as a member of Apiaceae subfamily Azorelloideae. The cpDNA-based phylogenies are not sufficiently resolved in their distal portions to elucidate the tribal placement of the endemic genus Nothosmyrnium, whereas the ITS trees strongly indicate an affinity with tribe Pimpinelleae. The affinities of several Chinese endemic species are also addressed. Peucedanum delavayi, for example, is phylogenetically distant from Sinodielsia and Meeboldia, genera with which it has been allied previously, and shows close affinity to three Chinese species of Ligusticum in tribe Selineae. Aside from providing a framework for taxonomic revisions, the phylogenetic structure recovered in this study for subfamily Apioideae will lay the foundation for future investigations of evolutionary patterns of morphological characters and biogeography.
机译：中国有世界上最大的伞形科（伞形科），有十种特有属。我们以前对中国A科（Apiaceae）亚科（Apoioideae）的系统发生关系的调查，仅基于nrDNA ITS序列，揭示了迄今为止在该亚科中尚未认识到的几个主要进化枝，并确认了五个特有属的系统发生位置。为了进一步阐明中国线虫科之间的关系，确定其余地方性属的系统发生位置，并检验我们较早研究中提出的关系假说，我们对ITS和一些较小的登录号的cpDNA rpl16和rps16内含子序列变异进行了检查。 。这些ITS和cpDNA数据矩阵分别包含158个和131个登录，其中ITS和cpDNA组合数据的分析中包含110个登录。分区ITS和叶绿体数据集的最大简约和贝叶斯分析导致高度一致的系统发育，而结合分子数据的分析则导致树的分辨率和总体分支支持度最高。在我们先前的研究中确定的两个主要进化枝在部落层次上得到了认可：科马罗维亚科J. Zhou和S. R. Downie部落。十一月和Chamaesieae J. Zhou和F.D. Pu部落。十一月单型部落Chamaesieae代表亚洲最早的亚科Apioideae分支谱系之一。先前限制的阿克诺内玛（Acronema）和东亚进化枝都在扩大。在先前未检查过的五个中国特有属中，查氏菌属发现在Scandiceae斯堪的纳维亚部落，与Komarovieae部落的Changium和Cyclorhiza的川民神同盟，Harrysmithia落入Acronema进化枝，Melanosciadium嵌入在Selineae部落的黑ica属中，以及迪金氏菌属pi科亚科Azolorideideae的成员。基于cpDNA的系统发育系统在其远端部分无法充分解析，无法阐明特有属Nothosmyrnium的部落位置，而ITS树强烈地表明与部落Pimpinelleae的亲和力。还介绍了几种中国特有物种的亲缘关系。例如，Peucedanum delavayi与以前同属的中华绒螯蟹和Meeboldia属在系统发育上相距较远，并且与Selineae部落的三个中国女贞具有密切的亲和力。除了提供分类学修订的框架外，本次研究为亚科亚科提供的系统发育结构将为未来研究形态特征和生物地理学的进化模式奠定基础。

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