Genome-wide analyses for personality traits identify six genomic loci and show correlations with psychiatric disorders

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Abstract

Chi-Hua Chen and colleagues report a GWAS for five personality traits and identify four loci associated with extraversion and two associated with neuroticism at genome-wide significance. They find that the five personality traits are genetically correlated and identify genetic correlations between personality traits and psychiatric disorders.

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The psychophysiological basis of introversion-extraversion.

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Common disorders are quantitative traits.

Oliver Davis, Robert Plomin, Claire Haworth (2009)

After drifting apart for 100 years, the two worlds of genetics - quantitative genetics and molecular genetics - are finally coming together in genome-wide association (GWA) research, which shows that the heritability of complex traits and common disorders is due to multiple genes of small effect size. We highlight a polygenic framework, supported by recent GWA research, in which qualitative disorders can be interpreted simply as being the extremes of quantitative dimensions. Research that focuses on quantitative traits - including the low and high ends of normal distributions - could have far-reaching implications for the diagnosis, treatment and prevention of the problematic extremes of these traits.