On the effect of asymmetrical trait inheritance on models of trait evolution.

Details

Serval ID
serval:BIB_FDE71488549F
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
On the effect of asymmetrical trait inheritance on models of trait evolution.
Journal
Systematic biology
Author(s)
Duchen P., Alfaro M.L., Rolland J., Salamin N., Silvestro D.
ISSN
1076-836X (Electronic)
ISSN-L
1063-5157
Publication state
Published
Issued date
18/07/2020
Peer-reviewed
Oui
Language
english
Notes
Publication types: Journal Article
Publication Status: aheadofprint
Abstract
Current phylogenetic comparative methods modelling quantitative trait evolution generally assume that, during speciation, phenotypes are inherited identically between the two daughter species. This, however, neglects the fact that species consist of a set of individuals, each bearing its own trait value. Indeed, because descendent populations after speciation are samples of a parent population, we can expect their mean phenotypes to randomly differ from one another potentially generating a "jump" of mean phenotypes due to asymmetrical trait inheritance at cladogenesis. Here, we aim to clarify the effect of asymmetrical trait inheritance at speciation on macroevolutionary analyses, focusing on model testing and parameter estimation using some of the most common models of quantitative trait evolution. We developed an individual-based simulation framework in which the evolution of species phenotypes is determined by trait changes at the individual level accumulating across generations and cladogenesis occurs then by separation of subsets of the individuals into new lineages. Through simulations, we assess the magnitude of phenotypic jumps at cladogenesis under different modes of trait inheritance at speciation. We show that even small jumps can strongly alter both the results of model selection and parameter estimations, potentially affecting the biological interpretation of the estimated mode of evolution of a trait. Our results call for caution when interpreting analyses of trait evolution, while highlighting the importance of testing a wide range of alternative models. In the light of our findings, we propose that future methodological advances in comparative methods should more explicitly model the intra-specific variability around species mean phenotypes and how it is inherited at speciation.
Keywords
comparative methods, phylogeny, trait evolution, speciation
Pubmed
Open Access
Yes
Create date
24/07/2020 14:13
Last modification date
10/09/2020 6:26
Usage data