Genome size rather than content might affect call properties in toads of three ploidy levels (Anura: Bufonidae: Bufo viridis subgroup).

Détails

ID Serval
serval:BIB_3390C1F361AB
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genome size rather than content might affect call properties in toads of three ploidy levels (Anura: Bufonidae: Bufo viridis subgroup).
Périodique
Biological Journal of the Linnean Society
Auteur(s)
Guignard M., Büchi L., Gétaz M., Betto-Colliard C., Stöck M.
ISSN
1095-8312
Statut éditorial
Publié
Date de publication
2012
Volume
105
Numéro
3
Pages
584-590
Langue
anglais
Résumé
In vertebrates, genome size has been shown to correlate with nuclear and cell sizes, and influences phenotypic features, such as brain complexity. In three different anuran families, advertisement calls of polyploids exhibit longer notes and intervals than diploids, and difference in cellular dimensions have been hypothesized to cause these modifications. We investigated this phenomenon in green toads (Bufo viridis subgroup) of three ploidy levels, in a different call type (release calls) that may evolve independently from advertisement calls, examining 1205 calls, from ten species, subspecies, and hybrid forms. Significant differences between pulse rates of six diploid and four polyploid (3n, 4n) green toad forms across a range of temperatures from 7 to 27 °C were found. Laboratory data supported differences in pulse rates of triploids vs. tetraploids, but failed to reach significance when including field recordings. This study supports the idea that genome size, irrespective of call type, phylogenetic context, and geographical background, might affect call properties in anurans and suggests a common principle governing this relationship. The nuclear-cell size ratio, affected by genome size, seems the most plausible explanation. However, we cannot rule out hypotheses under which call-influencing genes from an unexamined diploid ancestral species might also affect call properties in the hybrid-origin polyploids.
Mots-clé
advertisement calls, cell size, evolution, release calls
Web of science
Open Access
Oui
Création de la notice
03/10/2011 13:41
Dernière modification de la notice
20/08/2019 14:19
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