Feller, Anna F; Seehausen, Ole (2022). Genetic architecture of adaptive radiation across two trophic levels. Proceedings of the Royal Society. Series B - biological sciences, 289(1974), p. 20220377. Royal Society of London 10.1098/rspb.2022.0377
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Feller___Seehausen_2022_PRSL_Genetic_architecture_of_adaptive_radiationacross_two_trophic_levels.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (1MB) | Preview |
Evolution of trophic diversity is a hallmark of adaptive radiation. Yet, transitions between carnivory and herbivory are rare in young adaptive radiations. Haplochromine cichlid fish of the African Great Lakes are exceptional in this regard. Lake Victoria was colonized by an insectivorous generalist and in less than 20 000 years, several clades of specialized herbivores evolved. Carnivorous versus herbivorous lifestyles in cichlids require
many different adaptations in functional morphology, physiology and behaviour.
Ecological transitions in either direction thus require many traits to change in a concerted fashion, which could be facilitated if genomic regions underlying these traits were physically linked or pleiotropic. However, linkage/pleiotropy could also constrain evolvability. To investigate components of the genetic architecture of a suite of traits that distinguish invertivores from algae scrapers, we performed quantitative trait locus
(QTL) mapping using a second-generation hybrid cross. While we found indications of linkage/pleiotropy within trait complexes, QTLs for distinct traits were distributed across several unlinked genomic regions. Thus, a mixture of independently segregating variation and some pleiotropy may underpin the rapid trophic transitions. We argue that the emergence and maintenance of associations between the different genomic regions underpinning co-adapted traits that evolved and persist against some gene flow
required reproductive isolation.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology 08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) |
UniBE Contributor: |
Feller, Anna Fiona, Seehausen, Ole |
Subjects: |
500 Science > 570 Life sciences; biology |
ISSN: |
0962-8452 |
Publisher: |
Royal Society of London |
Language: |
English |
Submitter: |
Marcel Häsler |
Date Deposited: |
05 May 2022 11:31 |
Last Modified: |
05 Dec 2022 16:19 |
Publisher DOI: |
10.1098/rspb.2022.0377 |
PubMed ID: |
35506225 |
BORIS DOI: |
10.48350/169722 |
URI: |
https://boris.unibe.ch/id/eprint/169722 |
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