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  Genomic evidence for sensorial adaptations to a nocturnal predatory lifestyle in owls

Espindola-Hernandez, P., Mueller, J. C., Carrete, M., Boerno, S., & Kempenaers, B. (2020). Genomic evidence for sensorial adaptations to a nocturnal predatory lifestyle in owls. Genome Biology and Evolution, 12(10), 1895-1908. doi:10.1093/gbe/evaa166.

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Espíndola-Hernández_2020.pdf (Publisher version), 686KB
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 Creators:
Espindola-Hernandez, Pamela1, Author              
Mueller, Jakob C.1, Author              
Carrete, Martina, Author
Boerno, Stefan2, Author              
Kempenaers, Bart1, Author              
Affiliations:
1Abteilung Kempenaers, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society, ou_2149689              
2Sequencing (Head: Bernd Timmermann), Scientific Service (Head: Christoph Krukenkamp), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1479670              

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Free keywords: night-active, raptor, genome-wide analysis, comparative genomics, positive selection, Strigiformes
 Abstract: Owls (Strigiformes) evolved specific adaptations to their nocturnal predatory lifestyle, such as asymmetrical ears, a facial disk, and a feather structure allowing silent flight. Owls also share some traits with diurnal raptors and other nocturnal birds, such as cryptic plumage patterns, reversed sexual size dimorphism, and acute vision and hearing. The genetic basis of some of these adaptations to a nocturnal predatory lifestyle has been studied by candidate gene approaches but rarely with genome-wide scans. Here, we used a genome-wide comparative analysis to test for selection in the early history of the owls. We estimated the substitution rates in the coding regions of 20 bird genomes, including 11 owls of which five were newly sequenced. Then, we tested for functional overrepresentation across the genes that showed signals of selection. In the ancestral branch of the owls, we found traces of positive selection in the evolution of genes functionally related to visual perception, especially to phototransduction, and to chromosome packaging. Several genes that have been previously linked to acoustic perception, circadian rhythm, and feather structure also showed signals of an accelerated evolution in the origin of the owls. We discuss the functions of the genes under positive selection and their putative association with the adaptation to the nocturnal predatory lifestyle of the owls.

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Language(s): eng - English
 Dates: 2020-08-052020-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1093/gbe/evaa166
Other: Immediate Open Access
 Degree: -

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Title: Genome Biology and Evolution
  Other : GBE
  Abbreviation : Genome Biol Evol
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 12 (10) Sequence Number: - Start / End Page: 1895 - 1908 Identifier: ISSN: 1759-6653
CoNE: https://pure.mpg.de/cone/journals/resource/1759-6653