Researchers from the University of Cambridge analyzed the DNA of 1,343 adult golden retrievers as part of the Golden Retriever Lifetime Study, driven by the Morris Animal Foundation since 2012. The aim was to understand the biological bases of temperament differences in dogs and their possible relationship with emotional and cognitive traits in humans.
The study used the C-BARQ questionnaire to assess 73 distinct behaviors, including aggression, fear, separation anxiety, and activity level. Behavioral profiles were compared with genetic information through genome-wide association studies (GWAS).
Main Findings
The analysis identified 12 genetic regions with significant associations to 8 behavioral traits in dogs.
When comparing the results with human databases, it was found that several of these genes are also linked to psychological traits in people, such as anxiety, depression, emotional sensitivity, and intelligence.
Highlighted Examples
- PTPN1: in dogs, associated with aggression towards other dogs; in humans, related to intelligence and certain depressive disorders.
- ROMO1: in dogs, linked to learning ability; in humans, associated with emotional sensitivity, irritability, and intellectual performance.
- Genes related to non-social fear (fear of stimuli like vacuum cleaners or loud noises) also appear linked in humans with anxiety and emotional sensitivity.
Scientific Implications
The researchers emphasize that genes do not completely determine behavior but influence broader biological processes such as emotional regulation and how the brain processes stimuli. The final behavior also depends on the environment, socialization, and learning experiences.
These findings suggest that dogs can serve as study models for human mental health, as they share the domestic and urban environment with people, developing comparable emotional patterns.
Practical Applications
- Adapted training: recognizing genetic predispositions can help design more empathetic and effective management strategies.
- Behavioral veterinary medicine: provides tools to address behavior problems related to stress or fear.
- Mental health research: offers insights into the biological mechanisms influencing human emotions and psychological disorders.
The study demonstrates that some genetic bases of behavior are shared between dogs and humans, reinforcing the idea that biology, experience, and environment interact in shaping behavior. Understanding this complexity not only improves animal welfare but also opens new avenues for investigating mental health in our own species.
