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首页> 外文期刊>Biological Journal of the Linnean Society >Origin and evolution of the endemic Macaronesian Inuleae (Asteraceae):evidence from the internal transcribed spacers of nuclear ribosomal DNA
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Origin and evolution of the endemic Macaronesian Inuleae (Asteraceae):evidence from the internal transcribed spacers of nuclear ribosomal DNA

机译：特有的玛卡罗尼人Inuleae（Asteraceae）的起源和进化：核内核糖体DNA内部转录间隔区的证据

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摘要

The tribe Inuleae (Asteraceae) has 10 species endemic to the Macaronesian islands, including the three endemic genera Allagopappus, Schizogyne, and Vierea. Phylogenetic analyses of DNA sequence data from the internal transcribed spacers (ITS) of the nuclear ribosomal DNA of 47 taxa were performed using all Macaronesian endemics and representative species from 21 of the 36 genera of the Inuleae. The resulting ITS phylogeny reveals that Allagopappus is sister to a large clade that contains all genera with a predominantly Mediterranean distribution. This finding suggests that Allagopappus may represent an ancient lineage that found refuge in the Canary Islands following the major climatic and/or geologic changes in the Mediterranean basin after the Tertiary. The Macaronesian endemic genus Schizogyne is sister to Limbarda from the Mediterranean. The third Macaronesian endemic genus, Vierea, is sister to Perralderia, which is restricted to Morocco and Algeria. Pulicaria canariensis is sister to P. mauritanico, a species endemic to Morocco and Algeria. In contrast, P. diffusa from the Cape Verde Islands is sister to a broadly distributed species, P. crispa, that occurs from North Africa to the Arabian peninsula. Based on the ITS data, the genera Blumea, Inula, and Pulicaria are not monophyletic. The ITS trees suggested that Blumea. mollis belongs to the tribe Plucheeae, a finding that is congruent with recent morphological evidence. A possible southern African origin for the core of the Laurasian taxa of the Inuleae is also suggested.
机译：Inuleae（Asteraceae）部落有10种马卡罗尼群岛特有的物种，包括3个特有属Allagopappus，Schizogyne和Vierea。系统分析了来自47个分类单元的核糖体DNA的内部转录间隔区（ITS）的DNA序列数据，使用了所有Macaronesian特有种和Inuleae 36属中21个的代表物种进行了系统发育分析。由此产生的ITS系统发育表明，Allagopappus是一个大型进化枝的姐妹，该进化枝包含所有属，主要分布于地中海。这一发现表明，Allagopappus可能代表了一个古老的世系，在第三纪之后地中海盆地发生了重大的气候和/或地质变化之后，该物种在加那利群岛找到了避难所。 Macaronesian特有种Schizogyne是来自地中海的Limbarda的姐妹。马卡罗尼西亚人的第三个特有属Vierea是Perralderia的姊妹，Perralderia仅限于摩洛哥和阿尔及利亚。 canariensis（Pulicaria canariensis）是毛里塔尼科体育（P. mauritanico）的姊妹，毛里塔尼科体育是摩洛哥和阿尔及利亚的特有物种。相比之下，来自佛得角群岛的白花假单胞菌（P. diffusa）是分布较广的种（P. crispa）的姊妹，该种从北非到阿拉伯半岛。根据ITS数据，Blumea，Inula和Pulicaria属不是单系的。 ITS的树建议使用Blumea。 mollis属于Plucheeae部落，这一发现与最近的形态学证据是一致的。还提出了可能的南部非洲起源，以作为Inuleae的Laurasian分类群的核心。

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