Genetic architecture of conspicuous red ornaments in female threespine stickleback

Yong, Lengxob; Peichel, Catherine; McKinnon, Jeffrey S (2016). Genetic architecture of conspicuous red ornaments in female threespine stickleback. G3 Genes Genomes Genetics, 6(3), pp. 579-588. Genetics Society of America 10.1534/g3.115.024505

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Explaining the presence of conspicuous female ornaments that take the form of male-typical traits has been a longstanding challenge in evolutionary biology. Such female ornaments have been proposed to evolve via both adaptive and nonadaptive evolutionary processes. Determining the genetic underpinnings of female ornaments is important for elucidating the mechanisms by which such female traits arise and persist in natural populations, but detailed information about their genetic basis is still scarce. In this study, we investigated the genetic architecture of two ornaments, the orange-red throat and pelvic spine, in the threespine stickleback (Gasterosteus aculeatus). Throat coloration is male-specific in ancestral marine populations but has evolved in females in some derived stream populations, whereas sexual dimorphism in pelvic spine coloration is variable among populations. We find that ornaments share a common genetic architecture between the sexes. At least three independent genomic regions contribute to red throat coloration, and harbor candidate genes related to pigment production and pigment cell differentiation. One of these regions is also associated with spine coloration, indicating that both ornaments might be mediated partly via pleiotropic genetic mechanisms.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Evolutionary Ecology

UniBE Contributor:

Peichel, Catherine

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

2160-1836

Publisher:

Genetics Society of America

Funders:

[UNSPECIFIED] National Institutes of Health R15 GM109291

Language:

English

Submitter:

Catherine Peichel

Date Deposited:

18 Jul 2017 09:13

Last Modified:

18 Jul 2017 09:13

Publisher DOI:

10.1534/g3.115.024505

PubMed ID:

26715094

BORIS DOI:

10.7892/boris.97910

URI:

https://boris.unibe.ch/id/eprint/97910

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