Key Gene Orchestrates Honeybee Social Behavior, Study Reveals

A collaborative study led by researchers from Heinrich Heine University Düsseldorf has uncovered the crucial role of the doublesex (dsx) gene in programming the complex social behavior of honeybees. The research, published in Science Advances, sheds light on how inherited behavioral patterns are genetically encoded in these highly social insects.

Honeybees form tight-knit colonies that function as "superorganisms," with thousands of worker bees performing collective tasks essential for the colony's survival. Martin Beye, senior author of the paper, emphasizes that these behaviors are inherited rather than learned, but the genetic mechanisms behind this inheritance were previously unknown.

Vivien Sommer, the study's first author, explains, "The gene programs whether a worker bee takes up a task in the colony and for how long. This includes collective tasks such as caring for the larvae or foraging for food and social exchanges on food sources, for example."

The research team, including scientists from Frankfurt/Main, Oxford, and Würzburg, used CRISPR/Cas9 gene editing to modify or deactivate the dsx gene in selected bees. They then monitored the bees' behavior using QR codes and video analysis supported by artificial intelligence.

The researchers also introduced green fluorescent protein (GFP) into the dsx sequence so that GFP was produced together with the dsx protein. The neuronal circuits could then be viewed using fluorescence microscopy, in both the unmodified bees and in those with genetic modifications. “We were able to use these tools to see exactly which neural pathways the dsx gene creates in the brain and how this gene in turn specifies the inherited behavioural patterns of honeybees,” explains Jana Seiler, who is also a co-author of the study.

The team now plans to expand their research to explore how this individual genetic programming contributes to the coordinated behavior of the entire bee colony, potentially uncovering new insights into the genetic basis of social behavior in insects.