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. 2024 Apr 23;41(4):msae071. doi: 10.1093/molbev/msae071

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© The Author(s) 2024. Published by Oxford University Press on behalf of Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 3. — Expansion of OR genes within OGG2-27 in Hystricomorpha evolution. a) A histogram illustrating the number of OR genes belonging to each of the 654 OGGs. OGG2-27 is denoted by an arrowhead. b) A phylogenetic tree for 363 hystricomorph OR genes within OGG2-27. The color codes are shown on the right. The scale bar represents the number of amino acid substitutions per site. c) Depiction of gains and losses of OR genes within OGG2-27 in each branch of the Hystricomorpha evolution. The boxes on external and internal nodes represent the number of intact genes within OGG2-27 in each extant species and estimates of functional genes in the ancestral species, respectively.