Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Regime Shift of Genome Size Crossing the Chasm of Eukaryogenesis

Version 1 : Received: 29 September 2021 / Approved: 1 October 2021 / Online: 1 October 2021 (15:26:03 CEST)

How to cite: Wang, H.; Zhao, X.; Xu, C.; Liu, Y.; Liu, Y.; Shi, L.; Jeppesen, E.; Xie, P. Regime Shift of Genome Size Crossing the Chasm of Eukaryogenesis. Preprints 2021, 2021100027 (doi: 10.20944/preprints202110.0027.v1). Wang, H.; Zhao, X.; Xu, C.; Liu, Y.; Liu, Y.; Shi, L.; Jeppesen, E.; Xie, P. Regime Shift of Genome Size Crossing the Chasm of Eukaryogenesis. Preprints 2021, 2021100027 (doi: 10.20944/preprints202110.0027.v1).

Abstract

The origin of the nucleus remains a great mystery in life science, although nearly two centuries have passed since the discovery of nuclei. To date, studies of eukaryogenesis have focused largely on micro-evolutionary explanations. Here, we examined macro-patterns of C-values (the total amount of DNA within the haploid chromosome set of an organism) for over 110,000 species and the chromosome numbers for over 11,000 species and their potential links with the state of atmospheric oxidation over geological time. Eukaryogenesis was in sync with an over 2.5 order-of-magnitude increase in genome size from prokaryote to eukaryote, and also with a rapid rise of atmospheric oxidation, suggesting that eukaryogenesis would have resulted from a regime shift of genomes driven by the oxidation-driven complexification and structuralization (e.g. chromatin packing).

Keywords

eukaryogenesis; genome complexification; atmospheric oxidation; macroevolution

Subject

LIFE SCIENCES, Other

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