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Fig. 4 | Human Genomics

Fig. 4

From: Placing human gene families into their evolutionary context

Fig. 4

Molecular evolution of orchid bee chemosensory receptors. A Males of sibling Euglossa species [335] manufacture perfumes to attract females and differ by a single compound per species (noted as + HNBD/+ L97) in this system [180, 336,337,338]. B Rates of nonsynonymous substitutions (dN) in Euglossa chemosensory genes are significantly higher (denoted with asterisk) than in non-chemosensory genes. C dN versus rates of synonymous substitutions (dS). Selection analyses reveal candidate chemosensory receptors (e.g., Or41) under divergent selection in the two sister species, potentially related to perfume differences. Figure adapted from Brand et al. [185] under a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/). If an adaptive hypothesis is maintained, it is expected that the species divergent in OR41 might bind to + L97 in E. viridissima and + HNBD in E. dilemma, but this binding has yet to be experimentally demonstrated

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