Homology and the evolution of vocal folds in the novel avian voice box.

Autor:	Longtine C; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA., Eliason CM; The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA., Mishkind D; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA., Lee C; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA., Chiappone M; The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA., Goller F; School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA; Department of Zoophysiology, University of Münster, 48149 Münster, Germany., Love J; School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA., Kingsley EP; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA. Electronic address: evan_kingsley@hms.harvard.edu., Clarke JA; The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA. Electronic address: julia_clarke@jsg.utexas.edu., Tabin CJ; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA. Electronic address: tabin@genetics.med.harvard.edu.
Jazyk:	angličtina
Zdroj:	Current biology : CB [Curr Biol] 2024 Feb 05; Vol. 34 (3), pp. 461-472.e7. Date of Electronic Publication: 2024 Jan 05.
DOI:	10.1016/j.cub.2023.12.013
Abstrakt:	The origin of novel traits, those that are not direct modifications of a pre-existing ancestral structure, remains a fundamental problem in evolutionary biology. For example, little is known about the evolutionary and developmental origins of the novel avian vocal organ, the syrinx. Located at the tracheobronchial junction, the syrinx is responsible for avian vocalization, but it is unclear whether avian vocal folds are homologous to the laryngeal vocal folds in other tetrapods or convergently evolved. Here, we identify a core developmental program involved in avian vocal fold formation and infer the morphology of the syrinx of the ancestor of modern birds. We find that this ancestral syrinx had paired sound sources induced by a conserved developmental pathway and show that shifts in these signals correlate with syringeal diversification. We show that, despite being derived from different developmental tissues, vocal folds in the syrinx and larynx have similar tissue composition and are established through a strikingly similar developmental program, indicating that co-option of an ancestral developmental program facilitated the origin of vocal folds in the avian syrinx. Competing Interests: Declaration of interests The authors declare no competing interests. (Copyright © 2023. Published by Elsevier Inc.)
Databáze:	MEDLINE
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