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. 2022 Feb 9;23:110. doi: 10.1186/s12864-022-08353-7

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 3 — Relationship between whole-genome GC content (GC_w) and optimal growth temperature (Topt) in Archaea. The Topt ranges of Halobacteria (n = 151), other halophilic archaea (n = 2), and nonhalophilic archaea (n = 150) are 30 to 53 °C, 31 to 38 °C, and 23.6 to 106 °C, respectively. Phylogenetic generalized least squares regression analysis using the Ornstein-Uhlenbeck model with an ancestral state to be estimated at the root showed a significant positive correlation between GC_w and Topt in nonhalophilic archaea (slope = 0.001, P = 0.025)