Researchers identify 1,260 genetic variants linked to personality traits

An international research consortium has identified 1,260 genetic variants associated with the ‘Big Five’ personality traits: openness, conscientiousness, extraversion, agreeableness, and neuroticism. Published in the journal Nature, the study represents one of the largest genetic analyses to date, utilizing data from approximately 1.1 million participants across 46 research cohorts and 13 to 15 countries.

The findings indicate that while personality has a measurable biological foundation, there is no single ‘personality gene.’ Instead, thousands of tiny genetic variations contribute to these traits, with each individual variant having a minimal effect. The research highlights that genetic factors explain a limited portion of personality differences—estimated between roughly 5% and 13% depending on the metric used—leaving a substantial role for environmental factors, life experiences, culture, and social relationships.

Beyond mapping traits, the study suggests links between these genetic markers and various life outcomes, including mental health, physical longevity, education, and career choices. Researchers noted that certain variants associated with neuroticism are linked to increased risks for conditions such as anxiety and depression, while conscientiousness may correlate with better health outcomes and lower risks of substance abuse.