Evol Ecol Res 15: 733-746 (2013) Full PDF if your library subscribes.
Causes of variation in genotype × environment interaction
Rafael L. Rodríguez
Behavioral and Molecular Ecology Group, Department of Biological Sciences, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, USA
Correspondence: R.L. Rodríguez, Department of Biological Sciences, University of Wisconsin-Milwaukee, Lapham Hall, 3209 N. Maryland Ave., Milwaukee, WI 53201. USA.
Questions: What sustains genetic variation in plasticity (genotype × environment interaction, G × E) under selection across environments? What explains variation among traits and species in the expression of G × E?
Hypotheses and methods: I review two hypotheses that seek to explain variation in the expression of G × E. The grain-size hypothesis attempts to elucidate when selection can erode G × E, as it shapes patterns of phenotypic plasticity across environments. The developmental architecture hypothesis identifies developmental features that make traits vary in the propensity to express G × E. I also review studies that have addressed patterns of geographic variation in G × E, and discuss metrics of the strength of G × E that will facilitate future comparisons across traits and taxa.
Conclusions: There is tentative support for both the grain-size and the developmental architecture hypotheses, but further work is required to explain the maintenance of G × E and variation in its expression. I describe scenarios in which, on the one hand, G × E may promote the maintenance of genetic variation and hinder sexual selection, versus on the other, promote evolutionary divergence under natural and sexual selection.
Keywords: genotype × environment interaction, maintenance of variation.
DOWNLOAD A FREE, FULL PDF COPY
IF you are connected using the IP of a subscribing institution (library, laboratory, etc.)
or through its VPN.
© 2013 Rafael L. Rodríguez. All EER articles are copyrighted by their authors. All authors endorse, permit and license Evolutionary Ecology Ltd. to grant its subscribing institutions/libraries the copying privileges specified below without additional consideration or payment to them or to Evolutionary Ecology, Ltd. These endorsements, in writing, are on file in the office of Evolutionary Ecology, Ltd. Consult authors for permission to use any portion of their work in derivative works, compilations or to distribute their work in any commercial manner.
Subscribing institutions/libraries may grant individuals the privilege of making a single copy of an EER article for non-commercial educational or non-commercial research purposes. Subscribing institutions/libraries may also use articles for non-commercial educational purposes by making any number of copies for course packs or course reserve collections. Subscribing institutions/libraries may also loan single copies of articles to non-commercial libraries for educational purposes.
All copies of abstracts and articles must preserve their copyright notice without modification.