Summary
Incomplete resistance to coffee leaf rust (Hemileia vastatrix) varied among genotypes of Coffea canephora cv. Kouillou from near ‘immunity’ to a higher susceptibility than that of C. arabica cv. Mundo Novo. In 4 series of laboratory tests resistance components and reaction type (RT) were observed. Low disease levels in the field were mainly associated with low, or heterogeneous, RT and/or a low lesion density (LD). Among the components of resistance sporulating lesion density (SLD) showed the highest coefficient of correlation with disease level in the field (r=0.83). Components of resistance were intercorrelated and were also correlated with RT. Interactions between inoculation series and genotypes were significant for alle parameters of resistance, but especially so for LD.
A small part of the Kouillou population showed complete resistance to race II of H. vastatrix. Two rust genotypes isolated from ‘Kouillou’ interacted with some genotypes with complete or incomplete resistance. The complete and race-specific resistance of one genotype appeared to be governed by a dominant gene.
High levels of incomplete resistance appeared to inherit either monogenically or in a more complex way. Five genotypes with high levels of incomplete resistance, expressed by a low LD and a relatively high RT, were crossed with C. arabica cv. Catuai. The triploid F1 plants showed a variable but susceptible RT. These crosses may have value for obtaining coffee cultivars with durable resistance to coffe leaf rust.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Brown, J. F. & E. L. Sharp, 1969. Interaction of minor host genes for resistance to P. striiformis with changing temperature regimes. Phytopathology 59: 999–1001.
Cadena, G. G. & P. Buriticá C., 1980. Expressión de resistencia horizontal a la roya (Hemileia vastatrix Berk. y Br.) en Coffea canephora variedad Conilon. Cenicafé 31: 3–27.
Cadena G., G., 1978. Expressión de resistancia horizontal a la roya (Hemileia vastatrix) en la variedad Conilon (Coffea canephora). M. Sc. thesis. Universidad Nacional de Colombia. Bogotá, Colombia.
Eskes, A. B., 1982a. The use of leaf disk inoculations in assessing resistance to coffee leaf rust (Hemileia vastatrix). Neth. J. Pl. Path. 88: 127–141.
Eskes, A. B., 1982b. The effect of light intensity on incomplete resistance of coffee to Hemileia vastatrix. Neth. J. Pl. Path. 88: 191–202.
Eskes, A. B., 1983. Qualitative and quantitative variation in pathogenicity of races of coffee leaf rust (Hemileia vastatrix) detected in the State of Sao Paulo, Brazil. Neth. J. Pl. Path. 89, in press.
Eskes, A. B. & M. Toma-Braghini, 1981. Assessment methods for resistance to coffee leaf rust (Hemileia vastatrix Berk. et Br.). Pl. Prot. Bull. F.A.O. 29: 56–66.
Eskes, A. B. & M. Toma-Braghini, 1982. The effect of leaf age on incomplete resistance of coffee to Hemileia vastatrix. Neth. J. Pl. Path. 88: 219–230.
Hooker, A. L., 1967. The genetics and expression of resistance in plants to rusts of the genus Puccinia. Ann. Rev. Phytopathol. 5: 163–182.
Milus, E. A. & R. F. Line, 1980. Characterization of resistance to leaf rust in Pacific Northwest wheats. Phytopathology 70: 167–172.
Parlevliet, J. E., 1979. Components of resistance that reduce the rate of epidemic development. Ann. Rev. Phytopathol. 17: 203–222.
Parlevliet, J. E., 1981. Stabilizing selection in crop pathosystems: an empty concept or a reality? Euphytica 30: 259–269.
Parlevliet, J. E. & J. C. Zadoks, 1977. The integrated concept of disease resistance; a new view including horizontal and vertical resistance in plants. Euphytica 26: 5–21.
Paulino, A. J., 1981. Productividade de progenies de Guarini EP37 de Coffea canephora no Espírito Santo. In: Resumos 9° Congresso Brasileiro de Pesquisas Cafeeiras. Sao Lourenco (MG), Brazil, October 1981. p. 264–266.
Scali, M. H., A. Carvalho & L. C. Monaco, 1974. Resistência horizontal à ferrugem (Hemileia vastatrix) em cultivares de Coffea. In: Resumos XXVI Reunião Anual Soc. Bras. Progresso da Ciencia. Julho, 1974, p. 241.
Sharma, J. K., W. A. Heather & P. Winer, 1980. Effect of leaf maturity and shoot age of clones of Pupulus species on susceptibility to Melampsora larici populina. Phytopathology 70: 548–554.
Simons, M. D., 1972. Polygenic resistance to plant diseases and its use in breeding resistant cultivars. J. Envir. Qual. 1: 232–239.
Snedecor, G. W. & W. G. Cochran, 1967. Statistical Methods. Iowa State University Press, Ames, Iowa, USA. 593 pp.
Stubbs, R. W., 1980. Environmental resistance of wheat to yellow rust (Puccinia striiformis Westend. f. sp. tritici). In: Proceedings Fifth Eur. and Med. Cereal Rusts Conf., Bari and Rome, Italy. June 1980. p. 77–81.
Vanderplank, J. E., 1968. Disease resistance in plants. Academic Press, New York. 206 pp.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Eskes, A.B. 7. Characterization of incomplete resistance to Hemileia vastatrix in Coffea canephora cv. Kouillou. Euphytica 32, 639–648 (1983). https://doi.org/10.1007/BF00021477
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00021477