Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2023

A shark-inspired general model of tooth morphogenesis unveils developmental asymmetries in phenotype transitions

Résumé

Developmental complexity stemming from the dynamic interplay between genetic and biomechanic factors canalizes the ways genotypes and phenotypes can change in evolution. As a paradigmatic system, we explore how changes in developmental factors generate typical tooth shape transitions. Since tooth development has mainly been researched in mammals, we contribute to a more general understanding by studying the development of tooth diversity in sharks. To this end, we build a general, but realistic, mathematical model of odontogenesis. We show that it reproduces key shark-specific features of tooth development as well as real tooth shape variation in small-spotted catsharks Scyliorhinus canicula . We validate our model by comparison with experiments in vivo. Strikingly, we observe that developmental transitions between tooth shapes tend to be highly degenerate, even for complex phenotypes. We also discover that the sets of developmental parameters involved in tooth shape transitions tend to depend asymmetrically on the direction of that transition. Together, our findings provide a valuable base for furthering our understanding of how developmental changes can lead to both adaptive phenotypic change and trait convergence in complex, phenotypically highly diverse, structures.
Fichier principal
Vignette du fichier
zimm-et-al-2023-a-shark-inspired-general-model-of-tooth-morphogenesis-unveils-developmental-asymmetries-in-phenotype.pdf (12.67 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte
licence

Dates et versions

hal-04894916 , version 1 (17-01-2025)

Licence

Identifiants

Citer

Roland Zimm, Fidji Berio, Mélanie Debiais-Thibaud, Nicolas Goudemand. A shark-inspired general model of tooth morphogenesis unveils developmental asymmetries in phenotype transitions. Proceedings of the National Academy of Sciences of the United States of America, 2023, 120 (15), pp.e2216959120. ⟨10.1073/pnas.2216959120⟩. ⟨hal-04894916⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

More