Abstract
Under controlled inoculation, a set of 56 accessions belonging to 19 wild species of the genusCucumis was studied for resistance to seven isolates of cucurbit downy mildew (Pseudoperonospora cubensis (Berk. et Curt.) Rostow.) from cucumber. No resistance toP. cubensis was detected in theseCucumis accessions. In three host accession/pathogen isolate combinations, limited sporulation was observed. Nine newCucumis species are described as hosts forP. cubensis: C. africanus, C. ficifolius, C. figarei, C. meeusii, C. metuliferus, C. myriocarpus, C. leptodermis, C. sagittatus andC. zeyheri. Results are discussed in relation to the origin and evolution ofCucumis species.
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Abbreviations
- CUM/CUC:
-
samples from the Central Institute for Genetics and Research of Crop Plants, Gatersleben, Germany
- PI:
-
samples from the Germplasm Resources Laboratory, USDA-ARS, Beltsville, MD, USA
- PIVT:
-
samples from the Institute for Horticultural Plant Breeding (now CPRO-DLO), Wageningen, the Netherlands.
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Lebeda, A. Screening of wildcucumis species against downy mildew (Pseudoperonospora cubensis) isolates from cucumbers. Phytoparasitica 20, 203–210 (1992). https://doi.org/10.1007/BF02980842
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DOI: https://doi.org/10.1007/BF02980842