Campus Units
North Central Regional Plant Introduction Station, Agronomy, Horticulture
Document Type
Conference Proceeding
Conference
2nd International Downy Mildews Symposium
Publication Version
Published Version
Publication Date
2007
Journal or Book Title
Advances in Downy Mildew Research: Proceedings of the 2nd International Downy Mildews Symposium
Volume
3
First Page
157
Last Page
167
Conference Title
2nd International Downy Mildews Symposium
Conference Date
July 2-6, 2007
City
Olomouc, Czech Republic
Abstract
The Cucumis melo-Pseudoperonospora cubensis host-pathogen interaction is characterized by large variation in specificity. This report summarizes results obtained by laboratory screening of 52 C. melo accessions by 8 isolates of P cubensis. The isolates represent 8 different pathotypes with low, medium or high levels of pathogenicity. The reaction of C. melo accessions was evaluated on leaf discs removed from adult plants; sporulation intensity of P cubensis isolates was measured 6 to 14 days after inoculation. Relatively little variability in reaction patterns to P cubensis isolates was detected. The majority of C. melo accessions was highly susceptible to most of the P cubensis isolates studied. Altogether, 39 C. me lo accessions showed susceptibility to all 8 isolates. Relatively few accessions expressed incomplete resistance (8 accessions in 15 interactions with P cubensis isolates) or heterogenous reactions (8 accessions in 13 interactions). Only one accession (PI 315410) was found to be highly resistant to some P cubensis isolates. Among studied C. melo accessions, 14 different reaction patterns can be distinguished based on qualitative differences in response to this set of P cubensis isolates.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Lebeda, A.; Stepankova, J.; Krskova, M.; and Widrlechner, M. P., "Resistance in Cucumis melo germplasm to Pseudoperonospora cubensis pathotypes" (2007). NCRPIS Conference Papers, Posters and Presentations. 25.
https://lib.dr.iastate.edu/ncrpis_conf/25
Comments
This is a proceeding from 2nd International Downy Mildews Symposium 3 (2007): 157.