Hierarchical epigenetics

For a spotted hyena on the Serengeti, social status is everything. Clans adhere to a strict hierarchy of dominance among adult females. Now, a group of researchers has found social status is more than superficial; it stretches into the animals' DNA ( Commun. Biol. 2024, DOI: 10.1038/s42003-024-05926-y ). Many traditional methods for collecting DNA are too invasive for wild hyena populations, says lead researcher Alexandra Weyrich from the German Centre for Integrative Biodiversity Research, Halle-Jena-Leipzig. "So, we sample the feces." In collaboration with Weyrich, researchers from the Serengeti Hyena Project—who know each individual animal by sight—scooped the poop for later analysis. "What we found is quite stunning," says Weyrich: there is a distinct correlation between social status and DNA methylation . Adding methyl groups to certain regions of DNA changes how those regions are transcribed and can act like a genetic on/off switch. Forty-four genes are associated with the 147