Tamara Haselkorn (thaselkorn@wustl.edu)

Tammy’s interest in evolutionary biology was sparked as an undergraduate researcher in Dr. Fred Janzen’s lab of evolutionary herpetology at Iowa State University. After graduating ISU with a BS in biochemistry, Tammy worked several years as a research technician further sampling diverse topics in evolutionary biology ranging from plant systematics to Drosophila life history evolution. She then started graduate school at the University of Arizona where she developed her interest in symbiosis. In Dr. Teri Markow’s lab her work focused on understanding the distribution of the Spiroplasma heritable bacterial symbiont among Drosophila by investigating its prevalence and genetic diversity with and among Drosophila species, and she completed her doctoral degree after the lab moved to the University of California, San Diego. She continued her Spiroplasma work as a postdoc in Dr. John Jaenike’s lab at the University of Rochester where she examined the ability of Spiroplasma to confer its protection against the sterilizing effects of nematodes to novel Drosophila species and tracked the geographic spread of this defensive endosymbiont within its native Drosophila host. She is now excited to learn a new system, studying Dictyostelium and their symbioses with farming and defensive bacteria.


Haselkorn, T.S., T. Watts, and T.A. Markow. Density dynamics of diverse Spiroplasma strains naturally infecting different species of Drosophila. Fly 7(3):1-7

Cockburn, S.N.*, T.S. Haselkorn*, P.T. Hamilton, E. Landzberg, J. Jaenike, and S.J. Perlman. Dynamics of the continent-wide spread of a Drosophila defensive symbiont. Ecology Letters 16: 609-616. *Co-first authors

Haselkorn, T.S.*, S.N. Cockburn*, P.T. Hamilton, S.J. Perlman, and J. Jaenike. 2013. Infectious adaptation: potential host range of a defensive endosymbiont in Drosophila. Evolution 67: 934-945. *Co-first authors

Richmond, M.P., S. Johnson, T.S. Haselkorn, M. Lam, L.K. Reed, and T.A. Markow. 2013. Genetic isolation of island populations: geographic barrier or a host switch? Biological Journal of the            Linnean Society 108: 68-78.

McFrederick, Q.S., T.S. Haselkorn, G.G. Verocai, and J. Jaenike. 2012. Cryptic Onchocerca species infecting North American cervids, with implications for the evolutionary history of host associations in OnchocercaParasitology 140: 1201-1210.

Haselkorn, T.S. 2010. The Spiroplasma bacterial endosymbiont of Drosophila. Fly 4(1): 79-86.

Watts, T, T.S. Haselkorn, N.A. Moran, and T.A. Markow. 2009.  Variable incidence of Spiroplasma infections in natural populations of Drosophila species.  PLoS ONE 4: e5703.

Haselkorn, T.S., T.A. Markow, and N.A. Moran. 2009. Multiple introductions of the Spiroplasma bacterial endosymbiont into Drosophila. Molecular Ecology 18: 1294-1305.

Worobey, M., M. Gemmel, D.E. Teuwen, T. Haselkorn, K. Kunstman, et al. 2008.  Direct Evidence of Extensive Diversity of HIV-1 in Kinshasa by 1960.  Nature 455: 661-664.

Young, R.L, T.S. Haselkorn, and A.V. Badyaev. 2007. Functional equivalence of morphologies enables morphological and ecological versatility. Evolution 61: 2480-2492.

Gilbert, M.T., T. Haselkorn, M. Bunce, J.J. Sanchez, S.B. Lucas, et al. 2007. The isolation of nucleic acids from fixed, paraffin-embedded tissues-which methods are useful when? PLoS ONE 2: e537.

Gilbert, M.T., J.J. Sanchez, T. Haselkorn, L.D. Jewell, S.B. Lucas, E. et al. 2007. Multiplex PCR with minisequencing as an effective high- throughput SNP typing method for formalin-fixed tissue. Electrophoresis 28(14): 2361-2367.

Machado, C.A., T.S. Haselkorn, and M.A. Noor. 2007. Evaluation of the genomic extent of effects of fixed inversion differences on intraspecific variation and interspecific gene flow in Drosophila pseudoobscura and D. persimilis. Genetics 175(3): 1289-1306.

Nairn, C.J. and T. Haselkorn. 2005.Three loblolly pine CesA genes expressed in developing xylem are orthologous to secondary cell wall CesA genes of  angiosperms.  New Phytologist 166(3): 907-15.

Cronn, R.C., R.L. Small, T. Haselkorn, and J.F. Wendel. 2003. Cryptic repeated genomic recombination during speciation in Gossypium gossypioides. Evolution 57(11): 2475-2489.

Promislow, D.E.L. and T.S. Haselkorn. 2002. Age-specific metabolic rates and mortality rates in the genus Drosophila. Aging Cell 1: 66-74.

Cronn, R.C., R.L. Small, T. Haselkorn, and J.F.Wendel. 2002. Rapid diversification of the cotton genus (Gossypium: Malvaceae) revealed by analysis of sixteen nuclear and chloroplast genes.  American Journal of Botany 89(4): 707-725.

Cronn, R.C., M. Cedroni, T. Haselkorn, C. Grover, and J.F.Wendel. 2002. PCR-mediated recombination in amplification products derived from polyploid cotton. Theoretical and Applied Genetics 104: 482-489.

Janzen, F.J., J.G. Krenz, T.S. Haselkorn, E.D. Brodie, Jr., and E.D. Brodie III. 2002. Molecular phylogeography of common garter snakes (Thamnophis sirtalis) in western North America: implications for regional historical forces. Molecular Ecology 11: 1739-1751.

Weisrock, D.W., T.S. Haselkorn, and F.J. Janzen. 1998. Lack of genetic variation in cytochrome b in a population of smooth softshell turtles. Journal of the Iowa Academy of Science 105: 158-160.