Abstracts (first author)

Poster 

Modeling plastic and canalized phenotypic expression by the process of genetic accommodation

Author(s): Hazel WN, Smock RC, Steffen BT

Summary:

The evolution of polyphenism, in which a single genotype produces alternative discrete phenotypes in response to environmental cues, and the evolution of a novel canalized phenotype, in which a genotype produces a novel, invariant phenotype in spite of environmental differences, represent different end points in the process of genetic accommodation. Genetic accommodation is hypothesized to begin when heritable variation in developmental switch points and environmental variation conspire to trigger the expression of a novel phenotype, thus exposing the underlying genetic variation to selection. We model genetic accommodation using a threshold model. Using simulations, we illustrate the model by application to the evolution of both the environmentally induced expression of a novel defensive phenotype and the evolution of the canalized expression of a defensive phenotype. We show that, given the appropriate ecological and genetic conditions, genetic accommodation can occur rapidly, resulting in the evolution of either polyphenism or a novel canalized phenotype.



Contacts

Chairman: Octávio S. Paulo
Tel: 00 351 217500614 direct
Tel: 00 351 217500000 ext22359
Fax: 00 351 217500028
email: mail@eseb2013.com

Address

XIV Congress of the European Society for Evolutionary Biology

Organization Team
Department of Animal Biology (DBA)
Faculty of Sciences of the University of Lisbon
P-1749-016 Lisbon
Portugal

Website

Computational Biology & Population Genomics Group 
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