Toward Understanding the Repeated Occurrence of Associations between Melanin-Based Coloration and Multiple Phenotypes.

Détails

ID Serval
serval:BIB_5E5197E59D26
Type
Article: article d'un périodique ou d'un magazine.
Sous-type
Synthèse (review): revue aussi complète que possible des connaissances sur un sujet, rédigée à partir de l'analyse exhaustive des travaux publiés.
Collection
Publications
Titre
Toward Understanding the Repeated Occurrence of Associations between Melanin-Based Coloration and Multiple Phenotypes.
Périodique
The American Naturalist
Auteur(s)
San-Jose L.M., Roulin A.
ISSN
1537-5323 (Electronic)
ISSN-L
0003-0147
Statut éditorial
Publié
Date de publication
2018
Peer-reviewed
Oui
Volume
192
Numéro
2
Pages
111-130
Langue
anglais
Résumé
Melanin is the most widespread pigment in organisms. Melanin-based coloration has been repeatedly observed to be associated with the same traits and in the same direction in different vertebrate and insect species. However, whether any factors that are common to different taxa account for the repeated evolution of melanin-phenotype associations remains unclear. We propose to approach this question from the perspective of convergent and parallel evolution to clarify to what extent different species have evolved the same associations owing to a shared genetic basis and being subjected to similar selective pressures. Our current understanding of the genetic basis of melanin-phenotype associations allows for both convergent and parallel evolution, but this understanding is still limited. Further research is needed to clarify the generality and interdependencies of the different proposed mechanisms (supergenes, pleiotropy based on hormones, or neural crest cells). The general ecological scenarios whereby melanin-based coloration is under selection-protection from ultraviolet radiation, thermoregulation in cold environments, or as a signal of social status-offer a good opportunity to study how melanin-phenotype associations evolve. Reviewing these scenarios shows that some traits associated with melanin-based coloration might be selected together with coloration by also favoring adaptation but that other associated traits might impede adaptation, which may be indicative of genetic constraints. We therefore encourage further research on the relative roles that selection and genetic constraints play in shaping multiple melanin-phenotype associations. Placed into a phylogenetic context, this will help clarify to what extent these associations result from convergent or parallel evolutionary processes and why melanin-phenotype associations are so common across the tree of life.
Mots-clé
animal coloration, genetic constraints, multivariate selection, phenotypic integration, pleiotropy, supergene
Pubmed
Web of science
Création de la notice
16/08/2018 14:07
Dernière modification de la notice
17/08/2018 6:26
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