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• W2169355027 abstract "Abstract Background The vertebrate head is a highly derived trait with a heavy concentration of sophisticated sensory organs that allow complex behaviour in this lineage. The head sensory structures arise during vertebrate development from cranial placodes and the neural crest. It is generally thought that derivatives of these ectodermal embryonic tissues played a central role in the evolutionary transition at the onset of vertebrates. Despite the obvious importance of head sensory organs for vertebrate biology, their evolutionary history is still uncertain. Results To give a fresh perspective on the adaptive history of the vertebrate head sensory organs, we applied genomic phylostratigraphy to large-scale in situ expression data of the developing zebrafish Danio rerio . Contrary to traditional predictions, we found that dominant adaptive signals in the analyzed sensory structures largely precede the evolutionary advent of vertebrates. The leading adaptive signals at the bilaterian-chordate transition suggested that the visual system was the first sensory structure to evolve. The olfactory, vestibuloauditory, and lateral line sensory organs displayed a strong link with the urochordate-vertebrate ancestor. The only structures that qualified as genuine vertebrate innovations were the neural crest derivatives, trigeminal ganglion and adenohypophysis. We also found evidence that the cranial placodes evolved before the neural crest despite their proposed embryological relatedness. Conclusions Taken together, our findings reveal pre-vertebrate roots and a stepwise adaptive history of the vertebrate sensory systems. This study also underscores that large genomic and expression datasets are rich sources of macroevolutionary information that can be recovered by phylostratigraphic mining." @default.
• W2169355027 created "2016-06-24" @default.
• W2169355027 creator A5044012953 @default.
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• W2169355027 creator A5085297785 @default.
• W2169355027 creator A5088154322 @default.
• W2169355027 creator A5091194778 @default.
• W2169355027 date "2013-04-12" @default.
• W2169355027 modified "2023-09-26" @default.
• W2169355027 title "Phylostratigraphic profiles reveal a deep evolutionary history of the vertebrate head sensory systems" @default.
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• W2169355027 doi "https://doi.org/10.1186/1742-9994-10-18" @default.
• W2169355027 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3636138" @default.
• W2169355027 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23587066" @default.
• W2169355027 hasPublicationYear "2013" @default.
• W2169355027 type Work @default.

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