Genetic Associations Between Personality Traits and Lifetime Reproductive Success in Humans

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Berg , V , Lummaa , V , Rickard , I J , Silventoinen , K , Kaprio , J & Jokela , M 2016 , ' Genetic Associations Between Personality Traits and Lifetime Reproductive Success in Humans ' , Behavior Genetics , vol. 46 , no. 6 , pp. 742-753 . https://doi.org/10.1007/s10519-016-9803-5

Title: Genetic Associations Between Personality Traits and Lifetime Reproductive Success in Humans
Author: Berg, Venla; Lummaa, Virpi; Rickard, Ian J.; Silventoinen, Karri; Kaprio, Jaakko; Jokela, Markus
Contributor: University of Helsinki, Behavioural Sciences
University of Helsinki, Department of Social Research (2010-2017)
University of Helsinki, Clinicum
University of Helsinki, Behavioural Sciences
Date: 2016-11
Language: eng
Number of pages: 12
Belongs to series: Behavior Genetics
ISSN: 0001-8244
URI: http://hdl.handle.net/10138/230028
Abstract: Personality has been associated with reproductive success in humans and other animals, suggesting potential evolutionary selection pressures. However, studies to date have only examined these associations on a phenotypic level, which may be inadequate in estimating evolutionary change. Using a large longitudinal twin dataset of contemporary Finns, we compared the phenotypic (breeder's equation) and genetically informed (the Robertson-Price identity) associations between lifetime reproductive success (LRS) and two personality traits-neuroticism and extraversion. Neuroticism was not associated with LRS at the phenotypic nor genetic level, while extraversion was associated with higher LRS in men both phenotypically and genetically. Compared to the univariate phenotypic analysis, the genetic analysis suggested a larger selection response of extraversion, and a selection response of neuroticism due to indirect selection. We estimated that neuroticism decreases by .05 standard deviations and extraversion increases by .11 standard deviations by one generation. Our results highlight the importance of considering genetic associations between personality and fitness and investigating several inter-related personality traits and their covariance with each other to predict responses to selection more accurately.
Subject: Personality
Twins
Fitness
Reproductive success
Natural selection
Breeder's equation
FINNISH TWIN COHORT
EVOLUTIONARY GENETICS
ANIMAL PERSONALITY
ENVIRONMENT INTERACTION
FITNESS CONSEQUENCES
NATURAL-POPULATIONS
FERTILITY
SELECTION
HERITABILITY
TEMPERAMENT
515 Psychology
5144 Social psychology
3142 Public health care science, environmental and occupational health
1184 Genetics, developmental biology, physiology
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