Abstract
Rice blast occurred in epidemic proportions on a newly released upland rice cultivar BRS Colosso, in the rice growing season 2004/2005. Twenty isolates were collected from the affected panicles of the cultivar BRS Colosso from three different States, two pathotypes IB-1 and IB-17 were identified. They were classified into thirteen Brazilian pathotypes based on the reaction pattern on eight upland rice cultivars, utilized as local differentials. Differences in aggressiveness of the isolates on the cultivar BRS Colosso were evident. Ten highly aggressive isolates were used to determine the partial resistance to leaf blast in the BRS Colosso and BRS Bonança. There was no significant isolate x cultivar interaction for partial resistance. The mean leaf blast severity was significantly higher in BRS Colosso than in BRS Bonança. Inoculation of culms with the same ten isolates showed cultivar x isolate interaction. Some isolates were more aggressive showing severe culm blast. There was no correlation among the aggressiveness of the isolates on leaf and culm. The disease outbreak in BRS Colosso could be attributed to the absence of adequate degree of partial resistance, the preexistence of compatible pathotypes IB-1 and IB-17 and their dissemination through seed.
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Ahn, S. W. (2000). Spatial and temporal stability of genetic resistance to rice blast. In: Tharreau, D., Lebrun, M. H., Talbot, N. J., Notteghem, J. L. (eds.) Advances in rice blast research. Kluwer Academic Publishers, Dodrecht, pp. 162–171
Araújo, L. G., & Prabhu, A. S. (2002). Somaclones da cultivar de arroz aromático Basmati-370 resistentes à brusone. Pesq Agrop Bras 37, 1127–1135
Araújo, L. G., Prabhu, A. S., & Silva, G. B. (2005). Virulence pattern of Pyricularia grisea isolates from farmers’ fields on newly released upland rice cultivars. Fitopatol Bras 30,623–628
Atkins, J. C., Robert, A. L., Adair, C. R., Goto, K., Kozaka, T., Yanagida, R., Yamada, M., & Matsumot, S. (1967). An international set of rice varieties for differentiating races of Pyricularia oryzae. Phytopathology 57, 297–301
Bonman, J. M., Bandong, J. M., Lee, Y. H., Lee, E. J., & Valent, B. (1989). Race specific partial resistance to blast in temperate Japonica rice cultivars. Plant Dis. 73, 496–499
Correa-Victoria, F. J., & Zeigler, R. S. (1993). Pathogenic variability in Pyricularia oryzae at a rice blast “hot spot” breeding site in Eastern Colombia. Plant Dis. 77, 1029–1035
Couch, B. C., & Kohn, L. M. (2002). A multilocus gene genealogy concordant with host preference indicates segregation of a new species, Magnaporthe oryzae from M. grisea. Mycologia 94, 683–693
Kiyosawa, S. (1982). Genetics and epidemiological modeling of breakdown of plant disease resistance. Annu Rev Phytopatol 20, 93–117
Kiyosawa, S., & Shiyomi, M. (1976). Simulation of the process of breakdown of disease resistant varieties. Japan J Breed 26, 339–352
Lee, F. N. (1994). Rice breeding programs, blast epidemics and blast management in the United States. In: Zeigler, R. S., Leong, S. A., Teng, P. S. (eds.) Rice blast disease. CAB International, Wallingford, pp. 489–500
Ling, K. C., & Ou, S. H. (1969). Standardization of the international race numbers of Pyricularia oryzae. Phytopathology 59, 339–342
Notteghem, J. L. (1981). Cooperative experiment on horizontal resistance to rice blast. In: Blast and upland rice – report and recommendations from the meeting for international collaboration in upland rice improvement. International Rice Research Institute, Los Baños,pp. 43–51
Ou, S. H. (1985). Rice diseases, 2nd edition, Commonwealth Mycology Institute, Kew
Prabhu, A. S., Filippi, M. C., & Araújo, L. G. (2002a). Pathotype diversity of Pyricularia grisea from improved upland rice cultivars in experimental plots. Fitopatol Bras 27, 468–473
Prabhu, A. S., Filippi, M. C., Araújo, L. G., & Faria, J. C. (2002b). Genetic and phenotypic characterization of isolates of Pyricularia grisea from the rice cultivars Epagri 108 and 109 in the State of Tocantins. Fitopatol Bras 27, 566–573
Prabhu, A. S., Castro, E. M., Araújo, L. G., & Berni, R. F. (2003). Resistance spectra of six elite breeding lines of upland rice to Pyricularia grisea. Pesq Agrop Bras 38, 203–210
Tarr, S. A. J. (1972). The principles of plant pathology. Winchester Press, New York
Valent, B., & Chumley, F. G. (1994). A virulence genes and mechanisms of genetic instability in the rice blast fungus. In: Zeigler, R. S., Leong, S. A., Teng, P. S. (eds.) Rice blast disease. CAB International, Wallingford, pp. 111–134
Van der Plank, J. E. (1975). Principles of plant infection. Academic Press, New York
Yeh, W. H., & Bonman, J. E. (1986). Assessment of partial resistance to Pyricularia oryzae in six rice cultivars. Plant Pathol 35, 319–323
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Prabhu, A.S., Filippi, M.C., Silva, G.B., Silva Lobo, V.L., Morais, O.P. (2009). An Unprecedented Outbreak of Rice Blast on a Newly Released Cultivar BRS Colosso in Brazil. In: Wang, GL., Valent, B. (eds) Advances in Genetics, Genomics and Control of Rice Blast Disease. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9500-9_26
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DOI: https://doi.org/10.1007/978-1-4020-9500-9_26
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