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Genetic Signature Linked to Doting Male Mice Dads
New study finds a single gene may play a key role in parental caregiving instincts in male African striped mice.
Published on Feb. 22, 2026
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A new study on African striped mice has found that a single gene called Agouti may play an outsized role in parental caregiving instincts in male mice. The research discovered that more aggressive male mice tended to have higher expression of the Agouti gene compared to more caring male mice. Activating the Agouti gene in caring male mice also made them more aggressive toward pups. The findings suggest a mouse's environment and social conditions may influence its caregiving behaviors.
Why it matters
The study provides insights into the neurobiology underlying paternal caregiving behaviors, which are less understood compared to maternal parenting. While limited to mice, the research offers clues about the potential genetic and environmental factors that shape parenting instincts in male mammals.
The details
Researchers studied the brains of male African striped mice and found that more aggressive males tended to have higher expression of the Agouti gene compared to caring males. Activating the Agouti gene in caring male mice also made them more aggressive toward pups. The study also discovered that male mice living in groups were more likely to have higher Agouti expression than males living alone, suggesting a mouse's environment and social conditions may influence its caregiving behaviors.
- The study was published on February 18, 2026 in the journal Nature.
The players
Forrest Rogers
A postdoctoral researcher at Princeton University and the lead author on the study.
Catherine Peña
A neuroscience professor at Princeton University and a co-author on the study.
Christian Broberger
A professor of neurochemistry at Stockholm University in Sweden who commented on the significance of the study.
What they’re saying
“We didn't find that they needed new circuitry. We didn't find that they had some unique evolution of cells in the brain that they needed to be dads.”
— Catherine Peña, Neuroscience professor (Nature)
“There may be optimal conditions to help promote one's own best parenting.”
— Catherine Peña, Neuroscience professor (Nature)
“The neurobiology of maternal parenting is relatively well studied, but far less is known about paternal parenting. That Agouti —a gene known for its role in hunger and food intake—may play a part in paternal instinct was a 'surprise'.”
— Christian Broberger, Professor of neurochemistry (Nature)
The takeaway
This study highlights the potential genetic and environmental factors that may shape parenting instincts in male mammals, providing valuable insights into the neurobiology of paternal caregiving behaviors. While limited to mice, the findings offer clues about the complex interplay between biology and environment in shaping parenting behaviors across species.
