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. 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. Thiele, G., R. Nelson, O. Ortiz, and S. Sherwood. 2001. Participatory research and training: ten lesson from the Farmer Field Schools (FFS) in the Andes. Currents 27: 4-11. Nelson, R.J., Orrego, R., Ortiz, O., Mundt, M., Fredrix, M. and Vien, N.V. 2001. Working with resource-poor farmers to manage plant diseases. Plant Disease 85: 684-695. Perez, W.G., J.S. Gamboa, Y.V. Falcon, M. Coca, R.M. Raymundo and R.J. Nelson. 2001. Genetic structure of Peruvian populations of Phytophthora infestans. Phytopathology 91: 956-965. Garrett, K.A., R.J. Nelson, C.C. Mundt, G. Chacon, R.E. Jaramillo, and G.A. Forbes. 2001. The effects of host diversity and other management components on epidemics of late blight in the humid highland tropics. Phytopathology 91: 993-1000. Shanti, M.L., M.L.C. George, C.M. Vera Cruz, M.A. Bernardo, R.J. Nelson, H. Leung, J.N. Reddy and R. Sridhar. 2001. Identification of resistance genes effective against rice bacterial blight pathogen in Eastern India. Plant Disease 85: 506-512. Vera Cruz, C.M., J. Bai, I. Ona, H. Leung, R.J. Nelson, T.W. Mew and J.E. Leach. 2000. Predicting durability of a disease resistance gene based on an assessment of the fitness loss and epidemiological consequences of an avirulence gene mutation. Proc. Natl. Acad. Sci. USA. 97(25): 13500-13505. Kumar, J., R.J. Nelson, and R. S. Zeigler. 1999. Population structure and dynamics of Magnaporthe grisea in the India Himalayas. Genetics 152: 971-984. Finckh, M. and R.J. Nelson. 1999. Phylogenetic and pathotypic analysis