Martin Schlegel is at the Universität Tübingen, Zoologisches Institut, Abteilung Zellbiologie, Auf der Morgenstelle 28, D-72076 Tübingen, Germany.
Trends Ecol Evol. 1994 Sep;9(9):330-5. doi: 10.1016/0169-5347(94)90153-8.
Comparisons of ribosomal RNAs and various protein coding genes have contributed to a new view of eukaryote phylogeny. Analyses of paralogous protein coding genes suggest that archaebacteria and eukaryotes are sistergroups. Sequence diversity of small subunit rRNAs in protists by far exceeds that of any multicellular or prokaryote taxon. Remarkably, a group of taxa that lack mitochondria first branches off in the small subunit rRNA tree. The later radiations are formed by a series of clades that were once thought to be more ancestral. Furthermore, tracing of the evolutionary origin of secondary endobiontic events is now possible with sequence comparisons.
核糖体 RNA 和各种蛋白质编码基因的比较为真核生物系统发育提供了新的视角。对旁系同源蛋白质编码基因的分析表明，古细菌和真核生物是姐妹群。目前为止，在原生生物中小亚基 rRNA 的序列多样性远远超过任何多细胞生物或原核生物分类单元。值得注意的是，一组缺乏线粒体的生物首先在小亚基 rRNA 树上分支出来。后来的辐射由一系列曾经被认为更原始的进化枝组成。此外，通过序列比较，现在可以追踪次生内共生事件的进化起源。
