Modelling phenotypic plasticity. II. Do genetic correlations matter?

Heredity
M Pigliucci

Abstract

Predictions of the evolutionary trajectory of reaction norms and interpretation of empirical results are usually based on two mathematically equivalent ways of partitioning phenotypic variance into its genetic, environmental, and interaction components: the genotype by environment interaction estimated by means of an analysis of variance, or the interenvironment genetic correlation (i.e. the genetic correlation between the expressions of the same trait in two environments). Both these quantities are supposed to indicate the amount of genetic variability for plasticity in natural population. I point out that not only are the qualitative predictions based on these statistical methods sometimes in conflict with each other, but that both may fail to predict rates of evolution and equilibria under some circumstances, because they ignore the details of the genetic machinery. It is shown that, ultimately, the only way to predict reliably the evolution of plasticity is actually to know its specific genetic basis and the genotypic constitution of the population, however inconvenient this may be from both theoretical and empirical standpoints. The discussion is framed in terms of a simple one-locus two-allele model that mimics the real c...Continue Reading

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Citations

Feb 20, 2014·International Journal of Evolutionary Biology·Annalisa Varriale
Dec 24, 2011·Future Microbiology·Nicole Mideo, Sarah E Reece
Jul 29, 2010·Evolution; International Journal of Organic Evolution·John R StinchcombeJohanna Schmitt
Jan 24, 2014·Evolutionary Applications·Steven J FranksSally N Aitken
Jul 24, 2004·Journal of Evolutionary Biology·V Jormalainen, T Honkanen
Jan 13, 2006·Journal of Evolutionary Biology·P A AstlesR F Preziosi
Mar 30, 2017·BMC Plant Biology·Daniela D'EspositoMaria Raffaella Ercolano
Dec 1, 1999·Evolution; International Journal of Organic Evolution·Mark D Camara, Massimo Pigliucci
Jun 1, 1998·Evolution; International Journal of Organic Evolution·Robert A KrebsJeehyun Lee

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