The genetics of mate preferences in hybrids between two young and sympatric Lake Victoria cichlid species

Svensson, Ola; Woodhouse, Katie; van Oosterhout, Cock; Smith, Alan; Turner, George F.; Seehausen, Ole (2017). The genetics of mate preferences in hybrids between two young and sympatric Lake Victoria cichlid species. Proceedings of the Royal Society. Series B - biological sciences, 284(1849), p. 20162332. Royal Society of London 10.1098/rspb.2016.2332

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The genetic architecture of mate preferences are likely to affect significant evolutionary processes, including speciation and hybridisation. Here, we investigate laboratory hybrids between a pair of sympatric Lake Victoria cichlid fish species that appear to have recently evolved from a hybrid population between in similar predecessor species. The species demonstrate strong assortative mating in the lab associated with divergent male breeding colouration (red dorsum vs blue). We show in a common garden experiment, using DNA based paternity testing, that the strong female mate preferences among males of the two species are fully recovered in a large fraction of their F2 hybrid generation. Individual hybrid females often demonstrated consistent preferences in multiple mate choice trials (≥5) across a year or more. This result suggests that female mate preference is influenced by relatively few major genes or genomic regions. These preferences were not changed by experience of a successful spawning event with a male of the non-preferred species in a no-choice single-male trial. We found no evidence for imprinting in the F2 hybrids, although the F1 hybrid females may have been imprinted on their mothers. We discuss this nearly Mendelian inheritance of consistent innate mate preferences in the context of speciation theory.

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) > Aquatic Ecology

UniBE Contributor:

Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0962-8452

Publisher:

Royal Society of London

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

20 Jul 2017 10:14

Last Modified:

03 Feb 2018 02:30

Publisher DOI:

10.1098/rspb.2016.2332

Related URLs:

BORIS DOI:

10.7892/boris.93525

URI:

https://boris.unibe.ch/id/eprint/93525

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