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

Details

Serval ID
serval:BIB_3390C1F361AB
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Genome size rather than content might affect call properties in toads of three ploidy levels (Anura: Bufonidae: Bufo viridis subgroup).
Journal
Biological Journal of the Linnean Society
Author(s)
Guignard M., Büchi L., Gétaz M., Betto-Colliard C., Stöck M.
ISSN
1095-8312
Publication state
Published
Issued date
2012
Volume
105
Number
3
Pages
584-590
Language
english
Abstract
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.
Keywords
advertisement calls, cell size, evolution, release calls
Web of science
Open Access
Yes
Create date
03/10/2011 12:41
Last modification date
20/08/2019 13:19
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