The genetics of human personality.

Area of Science:

• Behavioral Genetics
• Psychiatric Genetics

Background:

• Personality traits are enduring patterns of thoughts, feelings, and behaviors.
• These traits are moderately heritable and can predict life outcomes, including psychopathology.
• Psychiatric diseases are viewed as extremes of normal personality tendencies, suggesting shared genetic factors.

Purpose of the Study:

• To review recent advancements in identifying genetic variants influencing personality traits.
• To explore the genetic overlap between personality traits and psychiatric disorders.
• To understand the genetic etiology of personality and its relation to neuropsychiatric diseases.

Main Methods:

• Review of studies assessing personality via questionnaires in healthy individuals.
• Inclusion of study designs: twin, linkage, candidate gene association, genome-wide association studies (GWAS), and polygenic analyses.
• Analysis of genetic correlations between personality and psychopathology.

Main Results:

• Genetic studies of personality are increasingly identifying influential genetic variants.
• Personality is highly polygenic, similar to neuropsychiatric diseases.
• Polygenic analyses demonstrate significant genetic correlations between personality traits and psychopathology.

Conclusions:

• Genetic studies are crucial for elucidating the etiology of personality traits.
• Shared genetic factors contribute to both personality traits and neuropsychiatric diseases.
• These findings advance our understanding of the genetic basis of mental health and illness.