Evidence of selection in the uncoupling protein 1 gene region suggests local adaptation to solar irradiance in savannah monkeys ( Chlorocebus spp.)

In the last 300 thousand years, the genus expanded from equatorial Africa into the southernmost latitudes of the continent, where colder climate was a probable driver of natural selection. We investigated population-level genetic variation in the mitochondrial uncoupling protein 1 ( ) gene region-im...

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Veröffentlicht in:Proceedings of the Royal Society. B, Biological sciences Jg. 289; H. 1982; S. 20221254
Hauptverfasser: Gagnon, Christian M, Svardal, Hannes, Jasinska, Anna J, Danzy Cramer, Jennifer, Freimer, Nelson B, Paul Grobler, J, Turner, Trudy R, Schmitt, Christopher A
Format: Journal Article
Sprache:Englisch
Veröffentlicht: England 14.09.2022
Schlagworte:
Acclimatization
Animals
Chlorocebus aethiops
Phylogeny
South Africa
Thermogenesis
Uncoupling Protein 1
South Africa
uncoupling protein 1
non-shivering thermogenesis
Chlorocebus
vervet monkey
cold adaptation
ISSN:1471-2954, 1471-2954
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Zusammenfassung:In the last 300 thousand years, the genus expanded from equatorial Africa into the southernmost latitudes of the continent, where colder climate was a probable driver of natural selection. We investigated population-level genetic variation in the mitochondrial uncoupling protein 1 ( ) gene region-implicated in non-shivering thermogenesis (NST)-in 73 wild savannah monkeys from three taxa representing this southern expansion ( and ) ranging from Kenya to South Africa. We found 17 single nucleotide polymorphisms with extended haplotype homozygosity consistent with positive selective sweeps, 10 of which show no significant linkage disequilibrium with each other. Phylogenetic generalized least-squares modelling with ecological covariates suggest that most derived allele frequencies are significantly associated with solar irradiance and winter precipitation, rather than overall low temperatures. This selection and association with irradiance is demonstrated by a relatively isolated population in the southern coastal belt of South Africa. We suggest that sunbathing behaviours common to savannah monkeys, in combination with the strength of solar irradiance, may mediate adaptations to thermal stress via NST among savannah monkeys. The variants we discovered all lie in non-coding regions, some with previously documented regulatory functions, calling for further validation and research.
Bibliographie:ObjectType-Article-1
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ISSN:1471-2954
1471-2954
DOI:10.1098/rspb.2022.1254