Convergent phenotypic evolution of the visual system via different molecular routes : how Neotropical cichlid fishes adapt to novel light environments

Härer, Andreas; Meyer, Axel; Torres-Dowdall, Julián

Convergent phenotypic evolution of the visual system via different molecular routes : how Neotropical cichlid fishes adapt to novel light environments

Dateien

Haerer_2-1l9y7zx4tos198.pdfGröße: 877.13 KBDownloads: 295

Datum

2018

Angaben zur Forschungsförderung

European Union (EU): 293700

Projekt

Comparative genomics of parallel in repeated adaptive radiations (GenAdap)

Open Access-Veröffentlichung

Open Access Gold

Sammlungen

Biologie
Zukunftskolleg

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Evolution Letters. 2018, 2(4), pp. 341-354. eISSN 2056-3744. Available under: doi: 10.1002/evl3.71

Zusammenfassung

How predictable is evolution? This remains a fundamental but contested issue in evolutionary biology. When independent lineages colonize the same environment, we are presented with a natural experiment that allows us to ask if genetic and ecological differences promote species‐specific evolutionary outcomes or whether species phenotypically evolve in a convergent manner in response to shared selection pressures. If so, are the molecular mechanisms underlying phenotypic convergence the same? In Nicaragua, seven species of cichlid fishes concurrently colonized two novel photic environments. Hence, their visual system represents a compelling model to address these questions, particularly since the adaptive value of phenotypic changes is well‐understood. By analyzing retinal transcriptomes, we found that differential expression of genes responsible for color vision (cone opsins and cyp27c1) produced rapid and mostly convergent changes of predicted visual sensitivities. Notably, these changes occurred in the same direction in all species although there were differences in underlying gene expression patterns illustrating nonconvergence at the molecular level. Adaptive phenotypes evolved deterministically, even when species differ substantially in ecology and genetic variation. This provides strong evidence that phenotypic evolution of the visual system occurred in response to similar selective forces of the photic environment.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Color vision, crater lake, cyp27c1, molecular adaptation, Nicaragua, opsins, predictability of evolution, regulatory change

Zitieren

ISO 690

HÄRER, Andreas, Axel MEYER, Julián TORRES-DOWDALL, 2018. Convergent phenotypic evolution of the visual system via different molecular routes : how Neotropical cichlid fishes adapt to novel light environments. In: Evolution Letters. 2018, 2(4), pp. 341-354. eISSN 2056-3744. Available under: doi: 10.1002/evl3.71

BibTex

@article{Harer2018-08Conve-42913,
  year={2018},
  doi={10.1002/evl3.71},
  title={Convergent phenotypic evolution of the visual system via different molecular routes : how Neotropical cichlid fishes adapt to novel light environments},
  number={4},
  volume={2},
  journal={Evolution Letters},
  pages={341--354},
  author={Härer, Andreas and Meyer, Axel and Torres-Dowdall, Julián}
}

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