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Recent Publications

Mutiga, S. K., Hoffmann, V., Harvey, J. W., Milgroom, M. G., and Nelson, R. J. (In Press). Assessment of aflatoxin and fumonisin contamination of maize in western Kenya. Phytopathology.

Benson, J.M., J.A. Poland, B.M. Benson, E.L. Stromberg and R.J. Nelson.  2015.  Resistance to gray leaf spot of Maize: genetic architecture and mechanisms elucidated through nested association mapping and near-isogenic line analysis. PLOS Genetics. DOI: 10.1371/journal.pgen.1005045

Nelson, R., & Coe, R. 2014. Transforming research and development practice to support agroecological intensification of smallholder farming. Journal of International Affairs, 67(2), 107–127.

Olukolu, B.A, G.-F. Wang, V. Vontimitta, S. Marla, J. Ji, E. Gachomo, K. Chu, A. Negeri, J. Benson, R. Nelson, P. Bradbury, D. Nielsen, J.B. Holland, P.J. Balint-Kurti and G. Johal.  2014.  A genome-wide association study of the maize hypersensitive defense response identifies genes that cluster in related pathways. PLoS Genetics 08/2014; 10(8):e1004562

Jamann, T.M., J.A. Poland, J.M. Kolkman, L.G. Smith and R.J. Nelson. 2014 Unraveling genomic complexity at a quantitative disease resistance locus in maize implicates structural variation and the receptor-like kinase pan1.  Genetics 198:333-344

Mutiga, S.K., V. Were, V. Hoffmann, J.W. Harvey, M.G. Milgroom and R.J. Nelson. 2014. Extent and drivers of mycotoxin contamination: inferences from a survey of Kenyan maize mills.  Phytopathology 104:1221-1231.

Mideros, S.X., M.L. Warburton, T.M. Jamann, G.L. Windham, W.P. Williams and R.J. Nelson. 2014. Quantitative trait loci for resistance to Aspergillus ear rot: analysis by linkage mapping, characterization of near-isogenic lines and meta-analysis.  Crop Sci. 54: 127-142.

Harvey, J., B. Gnonlonfin, M. Fletcher, G. Fox, S. Trowell, A. Berna, R. Nelson and R. Darnell.  2013.  Aflatoxins: Improving diagnostics for aflatoxin detection.  IFPRI Focus 20, Brief 19.

Nelson, R. and R. Coe.  2013.  Agroecological Intensification of Smallholder Farming.  In The Oxford Handbook of Food, Politics and Society. R Herring, Ed.

Jamann, T.,  Nelson, R.  and Balint-Kurti, P. 2013. The Genetic Basis of Disease Resistance in Maize. Chapter in “Genomics Applications in Plant Breeding” R. Tuberosa and R.Varshney, Eds.

Mideros, S.X., G.L. Windham, W. P. Williams, and R.J. Nelson.  2012.  Tissue-specific components of resistance to Aspergillus ear rot of maize.  Phytopathology 201:  787-793.

Chia JM, Song C, Bradbury PJ, Costich D, de Leon N, Doebley J, Elshire RJ, Gaut B, Geller L, Glaubitz JC, Gore M, Guill KE, Holland J, Hufford MB, Lai J, Li M, Liu X, Lu Y, McCombie R, Nelson R, Poland J, Prasanna BM, Pyhäjärvi T, Rong T, Sekhon RS, Sun Q, Tenaillon MI, Tian F, Wang J, Xu X, Zhang Z, Kaeppler SM, Ross-Ibarra J, McMullen MD, Buckler ES, Zhang G, Xu Y, Ware D. (2012) Maize HapMap2 identifies extant variation from a genome in flux. Nature Genetics 44:803-807.

Wisser, R.J., J.M. Kolkman, M.E. Patzoldt, J.B. Holland, J. Yu, M. Krakowsky, R.J. Nelson, P.J. Balint-Kurti. 2011.  Multivariate analysis of maize disease resistances suggests a pleiotropic genetic basis and implicates a GST gene. Proceedings of the National Academy of Science 108(18): 7339-7344.  Proceedings of the National Academy of Science 108:7339-7344.

Poland, Jesse A., Peter J. Bradbury, Edward S. Buckler, and Rebecca J. Nelson. 2011. Genome-wide nested association mapping of quantitative resistance to northern leaf blight in maize. Proceedings of the National Academy of Science 108(17): 6893-6898.

Chung, C.-L., J. Poland, K. Kump, J. Benson, J. Longfellow, E. Walsh, P. Balint-Kurti, R. Nelson.  2011.  Targeted discovery of quantitative trait loci for resistance to northern leaf blight and other diseases of maize.  Theoretical and Applied Genetics 123:  307-326.

Poland, J.A., and R.J. Nelson. 2011. In the eye of the beholder: the effect of rater variability and different rating scales on QTL mapping. Phytopathology 101:290-298.

Chung, Chia-Lin, Joy M. Longfellow, Ellie K. Walsh, George Van Esbroeck, Peter Balint-Kurti, and Rebecca J. Nelson. 2010. Resistance loci affecting distinct stages of fungal pathogenesis: use of introgression lines for QTLmapping and characterization in the maize-Setosphaeria turcica pathosystem. BMC Plant Biology 10: 103-127.PDF

Chung, C., Jamann, J., Longfellow, J., and Nelson, R. 2010. Characterization and fine-mapping of a resistance locus for northern leaf blight in maize bin 8.06. Theoretical and Applied Genetics 121(2): 205-227. (DOI 10.1007/s00122-010-1303-z)

Nelson, R.J.  2010. Pest Management, Farmer Incomes and Health Risks in SSA:  Pesticides, Host Plant Resistance and Other Measures. Chapter 6 in The African Food System and its Interaction with Human Health and Nutrition: Research and Policy Priorities, P. Pinstrup-Andersen, Ed.  Cornell University Press: New York. Pages 109-127.

Mideros, S. X., G.L. Windham, W.P. Williams, and R.J. Nelson.  Aspergillus flavus biomass in maize estimated by quantitative real-time PCR is strongly correlated with aflatoxin concentration. Plant Disease 93: 1163-1170.

Garrett, K. A., L. N. Zúñiga, E. Roncal, G. A. Forbes, C. C. Mundt, Z. Su, and R. J. Nelson.  2009.  The effects of host biodiversity on disease levels across a climatic gradient.  Ecological Applications 19:1868-1883.

Poland, J., P.J. Balint-Kurti, R.J. Wisser, R.C. Pratt and R.J. Nelson. 2009.  Shades of gray: The world of quantitative disease resistance. Trends in Plant Science 14:21-29.PDF

Ortiz, O., Frias, G., Ho, R., Cisneros, H., Nelson, R. Castillo, R., Orrego, R., Pradel, W., Alcazar, J., and Bazan, M.  2008.  Organizational learning through participatory research: CIP and CARE in Peru.  Agriculture and Human Values 25:419-431. PDF

Wisser, R.J., Murray, S.C., J.M. Kolkman, H. Ceballos and R.J. Nelson.  2008.  Selection mapping of loci for quantitative disease resistance in a diverse maize population. Genetics 180:583-599.PDF

Nelson, R.J. Pest Management, Farmer Incomes and Health Risks in SSA: Pesticides, Host Plant Resistance and Other Measures. Chapter 14 in The African Food System and its Interaction with Human Health and Nutrition: Research and Policy Priorities, P. Pinstrup-Andersen, Ed. Submitted.

Garrett, K.A., L.N. Zúñiga, E. Roncal, G.A. Forbes, C.C. Mundt, Z. Su and R.J. Nelson. The effects of host biodiversity on disease levels across a climatic gradient. Ecological Applications, in revision.

Wulff, E.G., W. Perez, R.J. Nelson, M. Bonierbale, J.A. Landeo and J.A. Forbes. 2007. Identification of stable resistance to Phytophthora infestans in potato genotypes evaluated in field experiments in Peru. Experimental Agriculture 43: 1-11.

Nicklin, C., M. Rivera and R. Nelson. 2006. Realizing the potential of an Andean legume: roles of market-led and research-led innovations. International Journal of Agricultural Sustainability 4(1): 61-78.

Wisser, R.J., Balint-Kurti, P.J., and R.J. Nelson. 2006. The genetic architecture of disease resistance in maize: a synthesis of published studies. Phytopathology 96(2): 120-129.

Wisser, R.J., Qi, S., Kresovich, S., and R.J. Nelson. 2005. Identification and characterization of regions of the rice genome associated with broad-spectrum, quantitative disease resistance. Genetics 169: 2277-2293. PDF

Andrade-Piedra, J., R. Hijmans, G. Forbes, W.E. Fry and R.J. Nelson. 2005. Simulation of potato late blight in the Andes.  1: Modification and parameterization of the LATEBLIGHT model. Phytopathology 95 (10): 1191-1199. PDF

Garry, G., A. Salas, G. Forbes, W. Perez, M. Santa Cruz, and R.J. Nelson.  2005. Host specialization not detected in isolates of Phytophthora infestans attacking wild and cultivated potatoes in Peru.  European J. Plant Pathology 54: 740-748.

Ortiz, O., Garrett, K. A., Heath, J. J., Orrego, R., and Nelson, R. J.  2004.  Management of potato late blight in the Peruvian highlands: Evaluating the benefits of Farmer Field Schools and Farmer Participatory Research.  Plant Disease 88: 15-44.

Naylor, R.L., W. P. Falcon, R.M. Goodman, M.M. Jahn, T. Sengooba, H. Tefera, and R.J. Nelson. 2004. Biotechnology in the Developing World: A Case for Increased Investments in Orphan Crops.  Food Policy 29(1): 15-44.PDF

R.J. Nelson, R.L. Naylor, M.M. Jahn. 2004. The role of genomics research in improvement of “orphan” crops. Crop Science 44: 1901-1904.

Trognitz, F.C., P.M. Manosalva, D.O. Niño-Liu, Ma. del R. Herrera, M. Ghislain, B.R. Trognitz and R.J. Nelson. 2002. Plant defense genes associated with quantitative resistance to potato late blight in Solanum phureja x S. tuberosum hybrids. Mol. Plant-Microbe Interactions 15 (6): 587-597.