The propagation of admixture-derived adaptive radiation potential

Kagawa, Kotaro; Seehausen, Ole (2020). The propagation of admixture-derived adaptive radiation potential. Proceedings of the Royal Society. Series B - biological sciences, 287(1934), p. 20200941. Royal Society of London 10.1098/rspb.2020.0941

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Adaptive radiations (ARs) frequently show remarkable repeatability where
single lineages undergo multiple independent episodes of AR in distant
places and long-separate time points. Genetic variation generated through
hybridization between distantly related lineages can promote AR. This
mechanism, however, requires rare coincidence in space and time between a
hybridization event and opening of ecological opportunity, because hybridization
generates large genetic variation only locally and it will persist only for a
short period. Hence, hybridization seems unlikely to explain recurrent AR in
the same lineage. Contrary to these expectations, our evolutionary computer
simulations demonstrate that admixture variation can geographically spread
and persist for long periods if the hybrid population becomes separated into
isolated sub-lineages. Subsequent secondary hybridization of some of these
can reestablish genetic polymorphisms from the ancestral hybridization in
places far from the birthplace of the hybrid clade and long after the ancestral
hybridization event. Consequently, simulations revealed conditions where
exceptional genetic variation, once generated through a rare hybridization
event, can facilitatemultiple ARs exploiting ecological opportunities available
at distant points in time and space.

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
08 Faculty of Science > Department of Biology > Institute of Cell Biology

UniBE Contributor:

Kagawa, Kotaro and Seehausen, Ole

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0962-8452

Publisher:

Royal Society of London

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

10 Sep 2020 07:48

Last Modified:

13 Sep 2020 02:51

Publisher DOI:

10.1098/rspb.2020.0941

PubMed ID:

32900317

BORIS DOI:

10.7892/boris.146453

URI:

https://boris.unibe.ch/id/eprint/146453

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