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The Adaptive Landscape in Evolutionary Biology$
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Erik Svensson and Ryan Calsbeek

Print publication date: 2013

Print ISBN-13: 9780199595372

Published to Oxford Scholarship Online: December 2013

DOI: 10.1093/acprof:oso/9780199595372.001.0001

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Wright’s Adaptive Landscape: Testing the Predictions of his Shifting Balance Theory

Wright’s Adaptive Landscape: Testing the Predictions of his Shifting Balance Theory

Chapter:
(p.58) Chapter 5 Wright’s Adaptive Landscape: Testing the Predictions of his Shifting Balance Theory
Source:
The Adaptive Landscape in Evolutionary Biology
Author(s):

Michael J. Wade

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199595372.003.0005

Our understanding of Wright's shifting balance theory (SBT) has deepened and its empirical predictions have been enriched by the theoretical, field and laboratory experimental research. Whereas models with strictly additive genetic effects provide the basis for much of evolutionary genetic theory, studies of the molecular genetic basis of adaptations find that gene interaction is the norm. The impact of Wright's SBT will not be fully understood until we have a better understanding of how physiological interactions affect patterns of phenotypic variation. And, until we understand the theory, it will not be evident whether or not the adaptive landscape is an adequate representation of the adaptive process that Wright envisioned.

Keywords:   epistasis, gene interaction, shifting balance theory, phenotype variation, adaptive landscape

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