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The evolutionary hi...
The evolutionary history and mechanistic basis of female ornamentation in a tropical songbird
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- Enbody, Erik D. (author)
- Uppsala universitet,Institutionen för medicinsk biokemi och mikrobiologi,Tulane Univ, Dept Ecol & Evolutionary Biol, New Orleans, LA 70118 USA
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- Sin, Simon Y. W. (author)
- Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA.;Univ Hong Kong, Sch Biol Sci, Pok Fu Lam Rd, Hong Kong, Peoples R China
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- Boersma, Jordan (author)
- Washington State Univ, Ctr Reprod Biol, Sch Biol Sci, Pullman, WA 99164 USA.;Cornell Univ, Dept Neurobiol & Behav, Ithaca, NY 14853 USA.;Cornell Lab Ornithol, Macaulay Lib, Ithaca, NY 14850 USA
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- Edwards, Scott, V (author)
- Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA
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- Ketaloya, Serena (author)
- Tulane Univ, Dept Ecol & Evolutionary Biol, New Orleans, LA 70118 USA
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- Schwabl, Hubert (author)
- Washington State Univ, Ctr Reprod Biol, Sch Biol Sci, Pullman, WA 99164 USA
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- Webster, Michael S. (author)
- Cornell Univ, Dept Neurobiol & Behav, Ithaca, NY 14853 USA.;Cornell Lab Ornithol, Macaulay Lib, Ithaca, NY 14850 USA
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- Karubian, Jordan (author)
- Tulane Univ, Dept Ecol & Evolutionary Biol, New Orleans, LA 70118 USA
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(creator_code:org_t)
- 2022-07-07
- 2022
- English.
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In: Evolution. - : John Wiley & Sons. - 0014-3820 .- 1558-5646. ; 76:8, s. 1720-1736
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Abstract
Subject headings
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- Ornamentation, such as the showy plumage of birds, is widespread among female vertebrates, yet the evolutionary pressures shaping female ornamentation remain uncertain. In part this is due to a poor understanding of the mechanistic route to ornamentation in females. To address this issue, we evaluated the evolutionary history of ornament expression in a tropical passerine bird, the White-shouldered Fairywren, whose females, but not males, strongly vary between populations in occurrence of ornamented black-and-white plumage. We first use phylogenomic analysis to demonstrate that female ornamentation is derived and that female ornamentation evolves independently of changes in male plumage. We then use exogenous testosterone in a field experiment to induce partial ornamentation in naturally unornamented females. By sequencing the transcriptome of experimentally induced ornamented and natural feathers, we identify genes expressed during ornament production and evaluate the degree to which female ornamentation in this system is associated with elevated testosterone, as is common in males. We reveal that some ornamentation in females is linked to testosterone and that sexes differ in ornament-linked gene expression. Lastly, using genomic outlier analysis we identify a candidate melanogenesis gene that lies in a region of high genomic divergence among populations that is also differentially expressed in feather follicles of different female plumages. Taken together, these findings are consistent with sex-specific selection favoring the evolution of female ornaments and demonstrate a key role for testosterone in generating population divergence in female ornamentation through gene regulation. More broadly, our work highlights similarities and differences in how ornamentation evolves in the sexes.
Subject headings
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Keyword
- Evolutionary genomics
- female ornamentation
- testosterone
- transcriptomics
Publication and Content Type
- ref (subject category)
- art (subject category)
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