Molecular Weed Science
C208 Plant Sciences
My research goal is to support sustainable weed management that helps contribute to sustainable cropping systems. To that end, I am interested in research to identify the molecular and genetic basis of complex herbicide resistance mechanisms; utilizing next-generation sequencing to study complex traits in weeds; and developing molecular markers for rapid resistance diagnostics. Research projects in my lab study changes in evolutionary trajectories of weedy species due to human management (specifically herbicides and herbicide resistance evolution), and develop genomics and bioinformatics resources to study herbicide resistance traits in weedy species and crops.
BSPM 581A4: Molecular Genetics and Evolution of Pesticide Resistance (Fall, Even)
Gaines, T., L. Lorentz, A. Figge, J. Herrmann, F. Maiwald, M. Ott, H. Han, R. Busi, Q. Yu, S. Powles, and R. Beffa.2014. RNA-Seq transcriptome analysis to identify genes involved in metabolism-based diclofop resistance in Lolium rigidum. The Plant Journal. Accepted Article online, DOI: 10.1111/tpj.12514
Sammons, R.D. and T. Gaines. Glyphosate resistance: State of knowledge. 2014. Pest Management Science. Early View article online, DOI: 10.1002/ps.3743.
Vila-Aiub, M., T. Gaines, S. Goh, H. Han, R. Busi, Q. Yu, and S. Powles. 2014. No fitness cost of glyphosate resistance endowed by massive EPSPS gene amplification in Amaranthus palmeri. Planta. Accepted article online, DOI: 10.1007/s00425-013-2022-x.
Busi, R., T. Gaines, M. Vila-Aiub, and S. Powles. 2014. Inheritance of evolved resistance to a novel herbicide (pyroxasulfone). Plant Science 217-218: 127-134.
Busi, R., M. Vila-Aiub,H. Beckie, T. Gaines, D. Goggin, S. Kaundun, M. Lacoste, P. Neve, S. Nissen, J. Norsworthy, M. Renton, D. Shaner, P. Tranel, T. Wright, Q. Yu, and S. Powles. 2013. Herbicide resistant weeds: from research and knowledge to future needs. Evolutionary Applications 6:1218-1221.
Gaines, T.,A. Wright, W. Molin, L. Lorentz, C. Riggins, P. Tranel, R. Beffa, P. Westra, and S. Powles. 2013. Identification of genetic elements associated with EPSPS gene amplification. PLoS ONE 8(6): e65819. doi:10.1371/journal.pone.0065819
Busi, R., T. Gaines, M. Walsh, and S. Powles. 2012. Understanding the potential for resistance evolution to the new herbicide pyroxasulfone: field screening at high doses versus recurrent selection at low doses. Weed Research 52:489-499.
Gaines, T., A. Cripps, and S. Powles. 2012. Evolved resistance to glyphosate in junglerice (Echinochloa colona) from the tropical Ord River region in Australia. Weed Technology 26:480-484.
Gaines, T., S. Ward, B. Bukun, C. Preston, J. Leach, and P. Westra. 2012. Interspecific hybridization transfers a previously unknown glyphosate resistance mechanism in Amaranthus species. Evolutionary Applications 5:29-38.
Gaines, T., D. Shaner, S. Ward, J. Leach, C. Preston, and P. Westra. 2011. Mechanism of resistance of evolved glyphosate-resistant Palmer amaranth (Amaranthus palmeri). Journal of Agricultural and Food Chemistry 59:5886-5889.
Gaines, T., W. Zhang, D. Wang, B. Bukun, S. Chisholm, D. Shaner, S. Nissen, W. Patzoldt, P. Tranel, A. Culpepper, T. Grey, T. Webster, W. Vencill, R. Sammons, J. Jiang, C. Preston, J. Leach, and P. Westra. 2010. Gene amplification confers glyphosate resistance in Amaranthus palmeri. Proceedings of the National Academy of Sciences USA. 107:1029-1034.
Bukun, B., T. Gaines, S. Nissen, P. Westra, G. Brunk, D. Shaner, B. Sleugh, and V. Peterson. 2009. Aminopyralid and clopyralid absorption and translocation in Canada thistle (Cirsium arvense). Weed Science 57:10-15.
Gaines, T., W. Henry, P. Byrne, P. Westra, S. Nissen, and D. Shaner. 2008. Jointed goatgrass (Aegilops cylindrica) by imidazolinone-resistant wheat hybridization under field conditions. Weed Science 56:32-36.
Westra, P., R. Wilson, S. Miller, P. Stahlman, G. Wicks, P. Chapman, J. Withrow, D. Legg, C. Alford, and T. Gaines. 2008. Weed population dynamics after six years under glyphosate and conventional herbicide-based weed control strategies. Crop Science 48:1170-1177.
Gaines, T., P. Byrne, P. Westra, S. Nissen, W. Henry, D. Shaner, and P. Chapman. 2007. An empirically derived model of field-scale gene flow in winter wheat. Crop Science 47:2308-2316.
Gaines, T., C. Preston, W. Henry, P. Byrne, and P. Westra. 2007. Adventitious presence of herbicide resistant wheat in certified and farm-saved seed lots. Crop Science 47:751-754.