CARACTERIZAÇÃO MORFOLÓGICA DE FONTES DE RESISTÊNCIA DE MELOEIRO A Pseudoperonospora cubensis
– The downy mildew, caused by the fungus Pseudoperonospora cubensis is a major foliar disease that attacks the melon crop in the rainy season in northeastern Brazil. The objective of this study was to identify and characterize morphologically resistant melon accessions to P. cubensis. Thirty-six acc...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universidade Federal Rural do Semi-Árido
2015-01-01
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| Series: | Revista Caatinga |
| Online Access: | http://www.redalyc.org/articulo.oa?id=237141066012 |
| Summary: | – The downy mildew, caused by the fungus Pseudoperonospora cubensis is a major foliar disease that attacks the melon crop in the rainy season in northeastern Brazil. The objective of this study was to identify and characterize morphologically resistant melon accessions to P. cubensis. Thirty-six accessions and four commercial cultivars were evaluated in a randomized block design with three replications. The plot was composed of seven plants. The evaluation was conducted in the under field conditions with a diagrammatic scale and calculating the disease percentage index (DPI). Resistance sources and references genotypes were characterized morphologically. The accessions C-RN-2, C-SE-2, C-CE-2, C-PE-2, C-PI-1, and C-BA-2 show resistance to P. cubensis and are promising for use in programs breeding for resistance to downy mildew although its fruits have reduced commercial quality. |
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| ISSN: | 0100-316X 1983-2125 |