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Paper wasps and honey bees share a genetic toolkit
Date:4/27/2010

CHAMPAIGN, lll. They are both nest-building social insects, but paper wasps and honey bees organize their colonies in very different ways. In a new study, researchers report that despite their differences, these insects rely on the same network of genes to guide their social behavior.

The study appears in the Proceedings of the Royal Society B: Biological Sciences.

Honey bees and paper wasps are separated by more than 100 million years of evolution, and there are striking differences in how they divvy up the work of maintaining a colony, said University of Illinois entomology professor Gene Robinson, who led the study with postdoctoral researcher Amy Toth.

"Honey bees have a sharp division of labor between queens, which reproduce, and workers, which care for the brood and forage for food, while among paper wasps social roles are much more fluid," he said. "And yet the same genes can be used by these different organisms to do similar kinds of things. This is the genetic toolkit idea: The same genetic elements are used for different types of division of labor."

A genetic toolkit already has been found for physical traits, such as the development of eyes, said Robinson, who is also a professor in the Institute for Genomic Biology. For example, the same gene, called PAX-6, is involved in eye development in mammals and insects, even though it is virtually certain that these structures did not evolve from a similar structure in a common ancestor.

For the new study, the researchers compared the activation of genes in the brains of four groups of female paper wasps (Polistes metricus) that have different roles in the nest, with some more active in reproduction and others more active in provisioning the brood.

The purpose of the study was to determine if differences in brain gene activity between the wasps rely on the same networks of genes that in the honey bee (Apis mellifera) drive thei
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Contact: Diana Yates
diya@illinois.edu
217-333-5802
University of Illinois at Urbana-Champaign
Source:Eurekalert  

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