- Author: Kathy Keatley Garvey
The theme? "Keeping Bees Healthy." An excellent topic.
The symposum is designed for beekeepers of all experience levels, including gardeners, farmers and anyone interested in the world of pollination and bees, said Amina Harris, director of the Honey and Pollination Center, housed in the Robert Mondavi Institute for Wine and Food Science. (See news article. To register, access this page.)
Keynote speaker is Marla Spivak, Distinguished McKnight Professor, University of Minnesota and a 2010 MacArthur Fellow. Spivak will speak on "Helping Bees Stand on Their Own Six Feet."
Another speaker is Amy Roth, assistant professor in the Department of Ecology, Evolution, and Organismal Biology, Department of Entomology, Iowa State University, Ames. She will be doing double-speaking duty when she makes the 1761-mile trip to UC Davis. Roth will deliver separate talks on honey bees and social wasps. At the May 9th symposium, she'll speak at 11 a.m. on "Combined Effects of Viruses and Nutritional Stress on Honey Bee Health."
A few days later, on Wednesday, May 13, her topic will turn to social paper wasps. She'll present a seminar, hosted by the UC Davis Department of Entomology and Nematology, on "Molecular Evolution in Insect Societies: Insights from Genomics of Primitively Social Paper Wasps" from 12:10 to 1 p.m. in 122 Briggs Hall, off Kleiber Hall Drive.
A little more about social wasps...
"The evolution of highly cooperative, eusocial behavior from solitary ancestry represents one of the major transitions in the evolution of life," she says. "Thus, understanding the evolution of insect eusociality can provide important insights into the evolution of complexity. Recently, with the advent of the genomic era, there has been great interest in understanding the molecular underpinnings of social behavior and its evolution. Several hypotheses about how eusociality have been proposed; these ideas can be roughly divided into two camps—one proposes that eusociality involved new (novel, or rapidly evolving) genes, and the other, that old (deeply conserved) genes took on new functions via shifts in gene regulation."
Toth will provide an overview of recent research in her laboratory "aiming to address the genomic basis of social evolution in insects, with a focus on gene expression. Utilizing a comparative approach involving multiple species and lineages of bees and wasps, as well as denovo sequencing of genomes,transcriptomes, andepigenomes, our work aims to trace the types of genomic changes related to the evolutionary transition from solitary toeusocial behavior."
Toth will present results from several lines of research mainly focused on primitively social Polistes paper wasps, that have led to the following insights:
- Relatively minor shifts in gene expression patterns may accompany earlier stages of social evolution
- Convergent evolution of social behavior in different lineages involves similar gene expression patterns in a small set of key pathways,
- Epigenetic mechanisms such as DNA methylation are variable across species and evolutionarily labile.
"Although more data on additional solitary and social species, and on novel genes, are needed, the emerging picture is that earlier transitions from solitary to simple eusociality involved relatively small changes in gene expression and regulation," Toth points out.
All in all, it's going to be a busy week for Amy Toth. Honey bees first, on Saturday, May 9. The vegetarians. Then their cranky cousins, the social wasps, on Wednesday, May 13. The carnivores.