Received date: 2020-04-18
Revised date: 2020-05-06
Online published: 2020-05-25
Supported by
Supported by the National Natural Science Foundation of China No(31970236)
Knowledge of the origin of eukaryotes is key to broadening our understanding of the eukaryotic genome and the relationship among internal structures within a eukaryotic cell. Since the discovery of archaea in 1977 and the proposal of three-domain tree of life by the American microbiologist Carl Woese, the intimate relationship in evolution between eukaryotes and archaea has been demonstrated by considerable experiments and analyses. From the beginning of the 21st century, with the development of phylogenetic methods and the discovery of new archaeal phyla more related to eukaryotes, increasing evidence has shown that Eukarya and Archaea should be merged into one domain, leading to a two-domain tree of life. Nowadays, the Asgard superphylum discovered via metagenomic analysis is regarded as the closest prokaryotes to eukaryotes. Nevertheless, several key questions are still under debate, such as what the ancestors of the eukaryotes were and when mitochondria emerged. Here, we review the current research progress regarding the changes of the tree of life and the detailed eukaryotic evolutionary mechanism. We show that the recent findings have greatly improved our knowledge on the origin of eukaryotes, which will pave the way for future studies.
Key words: eukaryogenesis; tree of life; archaea; three domains; two domains; endosymbiosis; mitochondria; Asgard superphylum
Zhiwei Gao, Long Wang . Progress in elucidating the origin of eukaryotes[J]. Hereditas(Beijing), 2020 , 42(10) : 929 -948 . DOI: 10.16288/j.yczz.20-107
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