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Jeremiah W. Busch

Field of Study: Evolutionary Biology
Title: Associate Professor
Degrees: Ph.D., Evolution, Indiana University
A.B., Biology, University of Chicago
Homepage: Homepage/Lab Web Site Link
Google Scholar:  Google Scholar
Office: Eastlick 387
Phone: 509-335-0086
Fax: nan
Mailing Address: School of Biological Sciences
Washington State University
PO Box 644236
Pullman,WA 99164-4236


We are biologists who seek to understand and explain biodiversity. To reach this goal, we challenge hypotheses with simple models, analyses of DNA sequence variation, information on traits, and manipulative studies in natural populations or controlled settings. These efforts help to elucidate the processes that shape patterns of organismal diversity in the wild.

Our projects mostly dissect the causes and consequences of evolution. We are particularly interested in traits that influence the magnitude and expression of genetic variation in natural populations (e.g. selfing and ploidy). Using plants as model systems, most work centers on these themes: 1) mechanisms that facilitate or constrain the evolution of self-fertilization; 2) the short- and long-term consequences of transitions in ploidy; and 3) the outcome of evolution when diverse lineages co-occur or hybridize in nature.

Representative Publications:

  • Layman, N.C. and J.W. Busch. 2018. Bottlenecks and inbreeding depression in autotetraploids. Evolution 72:2025-2037.
  • Koski, M.H., D.L. Grossenbacher, J.W. Busch and L.F. Galloway. 2017. A geographic cline in the ability to self-fertilize is unrelated to the pollination environment. Ecology 98:2930-2939.
  • Dixon, A.L. and J.W. Busch. 2017. Common garden test of range limits as predicted by a species distribution model in the annual plant Mimulus bicolor. American Journal of Botany 104:817-827.
  • Grossenbacher, D.L., Y. Brandvain, J. Auld, M. Burd, P.O. Cheptou, J.K. Conner, A.G. Grant, S. Hovick, J.R. Pannell, A. Pauw, T. Petanidou, A. Randle, R. Rubio de Casas, J.Vamosi, A. Winn, B. Igic, J.W. Busch, S. Kalisz and E.E. Goldberg. 2017. Self-compatibility is over-represented on islands. New Phytologist 215:469-478.
  • Layman, N.C., M.T.R. Fernando, C.R. Herlihy and J.W. Busch. 2017. Costs of selfing prevent the spread of a self-compatibility mutation that causes reproductive assurance. Evolution 71:884-897.
  • Busch, J.W. and L.F. Delph. 2017. Evolution: Selfing takes species down Stebbins’s blind alley. Current Biology 27:R61-R63.
  • Norton, N.A., M.T.R. Fernando, C.R. Herlihy and J.W. Busch. 2015. Reproductive character displacement shapes a spatially structured petal color polymorphism in Leavenworthia stylosa. Evolution 69:1191-1207.
  • Igic, B. and J.W. Busch. 2013. Is self-fertilization an evolutionary dead end? New Phytologist 198:386-397.
  • Busch, J.W. and L.F. Delph. 2012. The relative importance of reproductive assurance and automatic selection as hypotheses for the evolution of self-fertilization. Annals of Botany 109:553-562.
  • Busch, J.W., S. Joly and D.J. Schoen. 2011. Demographic signatures accompanying the evolution of selfing in Leavenworthia alabamica. Molecular Biology and Evolution 28:1717-1729.