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Phylogenomics uncovers early hybridization and adaptive loci shaping the radiation of Lake Tanganyika cichlid fishes.

Title: Phylogenomics uncovers early hybridization and adaptive loci shaping the radiation of Lake Tanganyika cichlid fishes.
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Name(s): Irisarri, Iker, author
Singh, Pooja, author
Koblmüller, Stephan, author
Torres-Dowdall, Julián, author
Henning, Frederico, author
Franchini, Paolo, author
Fischer, Christoph, author
Lemmon, Alan R, author
Lemmon, Emily Moriarty, author
Thallinger, Gerhard G, author
Sturmbauer, Christian, author
Meyer, Axel, author
Type of Resource: text
Genre: Journal Article
Text
Date Issued: 2018-08-08
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Lake Tanganyika is the oldest and phenotypically most diverse of the three East African cichlid fish adaptive radiations. It is also the cradle for the younger parallel haplochromine cichlid radiations in Lakes Malawi and Victoria. Despite its evolutionary significance, the relationships among the main Lake Tanganyika lineages remained unresolved, as did the general timescale of cichlid evolution. Here, we disentangle the deep phylogenetic structure of the Lake Tanganyika radiation using anchored phylogenomics and uncover hybridization at its base, as well as early in the haplochromine radiation. This suggests that hybridization might have facilitated these speciation bursts. Time-calibrated trees support that the radiation of Tanganyika cichlids coincided with lake formation and that Gondwanan vicariance concurred with the earliest splits in the cichlid family tree. Genes linked to key innovations show signals of introgression or positive selection following colonization of lake habitats and species' dietary adaptations are revealed as major drivers of colour vision evolution. These findings shed light onto the processes shaping the evolution of adaptive radiations.
Identifier: FSU_pmch_30089797 (IID), 10.1038/s41467-018-05479-9 (DOI), PMC6082878 (PMCID), 30089797 (RID), 30089797 (EID), 10.1038/s41467-018-05479-9 (PII)
Grant Number: 1150725, ALTF 440-2013
Publication Note: This NIH-funded author manuscript originally appeared in PubMed Central at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6082878.
Subject(s): Adaptation, Biological/radiation effects
Africa, Eastern
Animals
Biodiversity
Cichlids/classification
Cichlids/genetics
DNA, Mitochondrial/genetics
Diet
Evolution, Molecular
Fossils
Fresh Water
Gene Flow/radiation effects
Genetic Markers
Genotype
Geological Phenomena
Hybridization, Genetic/radiation effects
Lakes
Models, Genetic
Phenotype
Phylogeny
Sequence Alignment
Sequence Analysis, DNA
Species Specificity
Tanzania
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_pmch_30089797
Host Institution: FSU
Is Part Of: Nature communications.
2041-1723
Issue: iss. 1, vol. 9

Choose the citation style.
Irisarri, I., Singh, P., Koblmüller, S., Torres-Dowdall, J., Henning, F., Franchini, P., … Meyer, A. (2018). Phylogenomics uncovers early hybridization and adaptive loci shaping the radiation of Lake Tanganyika cichlid fishes. Nature Communications. Retrieved from http://purl.flvc.org/fsu/fd/FSU_pmch_30089797