Resistance in Cucurbita pepo and Cucurbita maxima germplasms to cucumber mosaic virus |
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Authors: | A Lebeda E K?ístková |
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Institution: | (1) Faculty of Natural Sciences, Department of Botany, Palacký University, 772 36 Olomouc-Holice, Czech Republic;(2) Gene Bank Division, Research Institute of Crop Production, Praha, 772 36 Olomouc-Holice, Czech Republic |
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Abstract: | Summary A total of 384 Cucurbita pepo and Cucurbita maxima accessions were evaluated in growth chambers or glasshouse tests for resistance to cucumber mosaic virus (CMV). Seedlings were mechanically inoculated at the cotyledon stage, and scored for symptoms on cotyledons and true leaves 7 and 18 days after inoculation. Significant variation in resistance was found. A limited number of accessions were free of visual symptoms of infection. One C. pepo accession and thirteen C. maxima accessions showed a high level of resistance. Generally, C. maxima may be considered more resistant to CMV compared to C. pepo. There is no close relationship between origin, fruit morphotypes and CMV resistance in either species. Some accessions (e.g., C. pepo PI 438699; C. maxima PI 176530, PI 265555, PI 368564, PI 500483) could be useful for the future breeding programmes. The C. pepo cvs. Cinderella and Defender F1, previously described as resistant, showed maximum susceptibility to the yellow strain of CMV.Abbreviations CMV
cucumber mosaic virus
- WMV
watermelon mosaic virus
- ZYMV
zucchini yellow mosaic virus
- CYVV
clover yellow vein virus
- ZYFV
zucchini yellow fleck virus |
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Keywords: | Cucurbita ssp germplasm evaluation cucumber mosaic virus artificial inoculation seedlings local and systemic infection resistance centers of origin |
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