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Fitness consequences of maternal and grandmaternal effects

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Title Fitness consequences of maternal and grandmaternal effects
 
Creator PRIZAK, R
EZARD, THG
HOYLE, RB
 
Subject Adaptation
indirect genetic effect
maternal effect
phenotypic evolution
phenotypic plasticity
quantitative genetics
PHENOTYPIC PLASTICITY
POPULATION-DYNAMICS
ENVIRONMENTAL CUES
EVOLUTION
ADAPTATION
PARENTS
SIZE
 
Description 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.
 
Publisher WILEY-BLACKWELL
 
Date 2014-12-29T04:59:21Z
2014-12-29T04:59:21Z
2014
 
Type Article
 
Identifier ECOLOGY AND EVOLUTION, 4(15)3139-3145
2045-7758
http://dx.doi.org/10.1002/ece3.1150
http://dspace.library.iitb.ac.in/jspui/handle/100/17137
 
Language English