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Plastic responses to novel environments are biased towards phenotype dimensions with high additive genetic variation

Author:
  • Daniel W.A. Noble
  • Reinder Radersma
  • Tobias Uller
Publishing year: 2019
Language: English
Pages: 13452-13461
Publication/Series: Proceedings of the National Academy of Sciences of the United States of America
Volume: 116
Issue: 27
Document type: Journal article
Publisher: National Acad Sciences

Abstract english

Environmentally induced phenotypes have been proposed to initiate and bias adaptive evolutionary change toward particular directions. The potential for this to happen depends in part on how well plastic responses are aligned with the additive genetic variance and covariance in traits. Using meta-analysis, we demonstrate that plastic responses to novel environments tend to occur along phenotype dimensions that harbor substantial amounts of additive genetic variation. This suggests that selection for or against environmentally induced phenotypes typically will be effective. One interpretation of the alignment between the direction of plasticity and the main axis of additive genetic variation is that developmental systems tend to respond to environmental novelty as they do to genetic mutation. This makes it challenging to distinguish if the direction of evolution is biased by plasticity or genetic “constraint.” Our results therefore highlight a need for new theoretical and empirical approaches to address the role of plasticity in evolution.

Keywords

  • Evolutionary Biology
  • Cryptic genetic
  • Evolvability
  • Phenotypic accommodation
  • Phenotypic plasticity
  • Variation

Other

Published
  • ISSN: 0027-8424