Scientists identify hundreds of DNA variants linked to Big Five personality traits
Updated
Updated · BBC.com · May 4
Scientists identify hundreds of DNA variants linked to Big Five personality traits
8 articles · Updated · BBC.com · May 4
The studies, using genetic data from hundreds of thousands to millions of people, suggest personality is shaped by many tiny genetic effects rather than a few powerful genes.
Researchers say Big Five heritability from genome-wide studies is about 9% to 18%, below twin-study estimates near 40% to 50%, while findings also point to roles for stress-response genes and the prefrontal cortex.
Scientists caution personality is also strongly shaped by many small environmental influences and gene-environment interactions, and say more data from non-European populations are needed to clarify how human nature develops.
If personality is half genetic and stable by age 30, what real hope is there for personal change?
With $100 genomes imminent, will genetic scores for behavior soon reshape our criminal justice system?
Can we environmentally activate the newfound 'educational resilience' gene in children who have experienced trauma?
Between 2024 and 2026, large genetic studies using massive datasets and innovative methods uncovered over 200 genetic loci linked to personality traits, confirming personality's highly polygenic nature. A new hierarchical model emerged, highlighting disinhibition as a key meta-trait connected to externalizing disorders and substance use. Neuroticism was found to influence both mental health risks and the likelihood of experiencing negative life events, but mindfulness interventions can reduce its impact. Conscientiousness offers protection against illness and mortality, while neuroticism's health effects worsen with age. Despite these advances, limited diversity in genetic data and ethical concerns around genetic screening and data use call for careful regulation and equitable application of these findings.