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Novel genes determine division of labor in insect societies
Date:1/30/2014

encompassed up to 100 million reads, i.e., short sequence sections of about 100 base pairs. The largest differences in gene expression were found between the queen and the worker castes, while the smallest differences were determined between the infertile brood carers and the foragers. The fertile brood care workers occupy an intermediate position between the queen and the sterile workers.

The ant queens expressed many caste-specific genes whose functions were known from comparisons with other species. This is not the case for the workers in which about half of the characteristic genes were found to be of unknown function. "Either these worker genes have undergone major modifications or they are novel genes," explained Feldmeyer. The fact that queens express more genes known from solitary hymenopterans and other insects fits to the evolution of social insects with workers being the derived state.

"This study of the differences in gene expression among ant castes is characteristic of the enormous advances that are currently being made in the field of biology," explained Professor Susanne Foitzik, head of the Evolutionary Biology work group at Mainz University. RNA sequencing is a technique that enables scientists to gain in-depth molecular information even for organisms that are not among the standard biological model organisms, such as the fruit fly Drosophila. "We can now also look at species known for their complexity in social behavior. In addition, by studying ants we can gain insights into the genes that are responsible for the unusually long life and fertility in insect queens," added Foitzik. The work group plans to continue its research into this area under the aegis of the new GeneRED research unit of the Faculty of Biology and the Institute of Molecular Biology (IMB).


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Contact: Professor Susanne Foitzik
foitzik@uni-mainz.de
49-613-139-27840
Johannes Gutenberg Universitaet Mainz
Source:Eurekalert  

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