Evaluation of phytophthora root rot-resistant Capsicum annuum accessions for resistance to phytophthora foliar blight and phytophthora stem blight


A mixture of six Georgia isolates of Phytophthora capsici (Leon.), the causal agent of phytophthora blight, were used for greenhouse mass screening of over 700 accessions of Capsicum annuum for both stem blight and foliar blight. From this screening, it was determined that resistance to both forms of the disease were relatively common in the germplasm, but resistance to one form of the disease was not strongly correlated to resistance to the other form. Ten accessions previously shown to possess root rot resistance were tested for resistance to stem rot and leaf blight, and were found to also be highly resistant to these forms of the disease. It appears that single accessions have resistance to foliar, stem and root rot caused by P. capsici, which may simplify breeding for resistance to all three forms of the disease.

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Candole, B. , Conner, P. and Ji, P. (2012) Evaluation of phytophthora root rot-resistant Capsicum annuum accessions for resistance to phytophthora foliar blight and phytophthora stem blight. Agricultural Sciences, 3, 732-737. doi: 10.4236/as.2012.35088.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Boatright, S., and McKissick, J. (2008) Georgia Farm Gate Vegetable Survey. Center for Agribusiness and Economic Development, College of Agricultural and Environmental Sciences, The University of Georgia, AR-08-01, pp. 62-63.
[2] Ristaino, J., and Johnston, S. (1999) Ecologically based approaches to management of phytophthora blight of bell pepper. Plant Disease, 83, 1080-1089. http://dx.doi.org/10.1094/PDIS.1999.83.12.1080
[3] Wang, D. and Bosland, P. (2006) The genes of Capsicum. HortScience, 41, 1169-1187.
[4] Lefebvre, V. and Palloix, A. (1996) Both epistatic and additive effects of QTLs are involved in polygenic induced resistance to disease: a case study the interaction pepper-Phytophthora capsici Leonian. Theoretical and Applied Genetics, 93, 503-511. http://dx.doi.org/10.1007/BF00417941
[5] Alcantara, T.P. and Bosland, P.W. (1994) An inexpensive disease screening technique for foliar blight of chile pepper seedlings. HortScience, 29, 1182-1183.
[6] Walker, S. and Bosland, P. (1999) Inheritance of Phytophthora root rot and foliar blight resistance in pepper. Journal of the American Society of Horticultural Science, 124, 14-18.
[7] Oelke, L., Bosland, P., and Steiner, R. (2003) Differentiation of race specific resistance to Phytophthora root rot and foliar blight in Capsicum annuum. Journal of the American Society of Horticultural Science 128, 213-218.
[8] Bosland, P.W. and Lindsey, D.L. (1991) A seedling screen for Phytophthora root rot of pepper, Capsicum annuum. Plant Disease, 75, 1048-1050. http://dx.doi.org/10.1094/PD-75-1048
[9] Sy, O., Bosland P.W. and Steiner R. (2005) Inheritance of Phytophthora stem blight resistance as compared to Phytophthora root rot and Phytophthora foliar blight resistance in Capsicum annuum L. Journal of the American Society of Horticultural Science, 130, 75-78.
[10] Glosier, B., Ogundiwin, E., Sidhu, G., Sischo, D., and Prince, J. 2008. A differential series of pepper (Capsicum annuum) lines delineates fourteen physiological races of Phytophthora capsici. Euphytica, 162, 23-30. http://dx.doi.org/10.1007/s10681-007-9532-1
[11] Ortega, G., Palazon Espanol, C., and Cuartero Zueco, J. (1995) Interactions in the pepper-Phytophthora capsici system. Plant Breeding, 114, 74-77. http://dx.doi.org/10.1111/j.1439-0523.1995.tb00763.x
[12] Candole, B., Conner P., and Ji, P. 2010. Screening of Capsicum annuum accessions for resistance to Georgia isolates of Phytophthora capsici. HortScience, 45, 254-259.
[13] Kuhajek, J.M., Jeffers, S.N., Slattery, M. and Wedge, D.E. (2003) A rapid microbioassay for discovery of novel fungicides for Phytoph-thora spp. Phytopathology, 93, 46-53. http://dx.doi.org/10.1094/PHYTO.2003.93.1.46
[14] Kim, Y. J., Hwang, B.K. and Park, K.W. (1989) Expression of age-related resistance in pepper plants infected with Phytophthora capsici. Plant Disease, 73, 745-747. http://dx.doi.org/10.1094/PD-73-0745

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