Fitness consequences of maternal and grandmaternal effects Journal Article

Author(s): Prizak, Roshan; Ezard, Thomas H; Hoyle, Rebecca B
Article Title: Fitness consequences of maternal and grandmaternal effects
Affiliation IST Austria
Abstract: Transgenerational effects are broader than only parental relationships. Despite mounting evidence that multigenerational effects alter phenotypic and life-history traits, our understanding of how they combine to determine fitness is not well developed because of the added complexity necessary to study them. Here, we derive a quantitative genetic model of adaptation to an extraordinary new environment by an additive genetic component, phenotypic plasticity, maternal and grandmaternal effects. We show how, at equilibrium, negative maternal and negative grandmaternal effects maximize expected population mean fitness. We define negative transgenerational effects as those that have a negative effect on trait expression in the subsequent generation, that is, they slow, or potentially reverse, the expected evolutionary dynamic. When maternal effects are positive, negative grandmaternal effects are preferred. As expected under Mendelian inheritance, the grandmaternal effects have a lower impact on fitness than the maternal effects, but this dual inheritance model predicts a more complex relationship between maternal and grandmaternal effects to constrain phenotypic variance and so maximize expected population mean fitness in the offspring.
Journal Title: Ecology and Evolution
Volume: 4
Issue 15
ISSN: 2045-7758
Publisher: Wiley-Blackwell  
Date Published: 2014-07-18
Start Page: 3139
End Page: 3145
Copyright Statement: CC BY
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council [Grant No. EP/H031928/1]. THGE is now funded by NERC Fellowship NE/J018163/1.
DOI: 10.1002/ece3.1150
Notes: We thank Rufus Johnstone, Bram Kuijper, Judith Lock, Stuart Townley, and Jonathan Wells for enjoyable discussions that improved our work and two anonymous reviewers for comments that improved the manuscript.
Open access: yes (OA journal)
IST Austria Authors
  1. Roshan Prizak
    4 Prizak
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