Summary
A detailed study of the components of partial resistance (PR) latency period, lesion number, and size of the sporulating area in lesions, indicated that lesion number was the most important component. No genetic variation was found for latency period. Analysis showed that lesion number is determined by several minor genes. Only young leaf tissue is susceptible to the blast fungus. Older leaves have increased levels of resistance. Resistance was expressed as a more rapid reduction of the number of lesions. The higher the level of PR of a genotype the faster the leaf tissue became resistant. Genotypes with a higher level of PR showed less lesions which usually had smaller sporulating areas compared to the susceptible check. Fewer lesions per plant and fewer leaves with lesions appeared well associated with resistance in the field. Breeders could select entries with fewer affected leaves.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Ahn, S.W., and S.H. Ou, 1982. Quantitative resistance of rice blast disease. Phytopathology 72: 279–282.
Bonman, J.M., B.A. Estrada and J.M. Bandong, 1989. Leaf and neck blast resistance in tropical lowland rice cultivars. Plant Disease 73: 388–390
Jeanguyot, M., 1983. Lutte contre la pyriculariose du riz. Mémoires et Travaux de l’ IRAT 2. IRAT, Nogent sur Marne, France. 55 pp.
Notteghem J.L., and G.M. Andriatompo, 1979. Étude de quelques facteurs de la résistance horizontale du riz à la pyriculariose. Agron. Trop. 34: 180–195.
Ou, S.H., 1985. Rice diseases. Commonwealth Mycological Institute. Kew, U.K. 2nd edition. 380 pp.
Parlevliet, J.E., 1983. Can horizontal resistance be recognized in the presence of vertical resistance in plants exposed to a mixture of pathogen races? Phytopathology 73: 379.
Roumen, E.C., 1992. Effect of leaf age on components of partial resistance in rice to leaf blast. Euphytica 63: 271–279.
Roumen, E.C., J.M. Bonman, and J.E. Parlevliet, 1992. Leaf age related partial resistance to Pyricularia oryzae in tropical lowland rice cultivars as measured by the number of sporulating lesions. Phytopathology 82: 1414–1417.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1993 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Roumen, E.C. (1993). Selection for Partial Resistance in Rice to Rice Blast. In: Jacobs, T., Parlevliet, J.E. (eds) Durability of Disease Resistance. Current Plant Science and Biotechnology in Agriculture, vol 18. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2004-3_17
Download citation
DOI: https://doi.org/10.1007/978-94-011-2004-3_17
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4885-9
Online ISBN: 978-94-011-2004-3
eBook Packages: Springer Book Archive