Screening of fungal diseases in offspring from crosses between Rosa sections Caninae and Cinnamomeae |
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| Institution: | 1. Council for Agricultural Research and Economics (CREA), Via della Navicella 2-4, I-00184 Rome, Italy;2. Post Graduate Programme “Cultural Policy and Development”, Open University of Cyprus, P.O. Box 12794, 2252, Cyprus;3. Latsia Cyprus & Post Graduate Department of Tourism, Hellenic Open University Aristotelous 18, GR-26335, Patras, Greece;4. Sapienza University of Rome, Department of Architecture and Project, Via Flaminia 369, I-00196 Rome, Italy;5. Via A. Di Tullio 40, I-00136 Rome, Italy;1. Flower Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China;2. Guangxi Crop Genetic Improvement and Biotechnology Laboratory, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China;3. Plant Breeding Institute, Faculty of Agriculture and Environment, University of Sydney, 107 Cobbitty Road, Cobbitty, NSW 2570, Australia;1. Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa;2. Department of Plant Science, FABI, University of Pretoria, Pretoria, South Africa;3. Department of Genetics, FABI, University of Pretoria, Pretoria, South Africa;4. Department of Plant Pathology, Stellenbosch University, South Africa;1. Department of Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Private Bag X20, Hatfield, Pretoria, 0028, South Africa;2. Forestry Protection Programme, Smurfit Kappa – Colombia, Calle 15 #18-109, Puerto Isaacs, Yumbo, Valle, 760502, Colombia;3. China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), Zhanjiang, 524088, Guangdong, China |
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| Abstract: | Roses constitute one of the most important ornamental plant crops. Recently an increasing interest has been noted also for the fruits; rose hips. Plant breeding of dogroses (section Caninae) is complicated by their unique meiosis with an unequal distribution of chromosomes, which results in strongly matroclinal offspring. Disease resistance was evaluated for blackspot, leaf spot, powdery mildew and rust in 649 field-grown offspring from eleven families. One genotype of Rosa dumalis and two of R. rubiginosa were used as pistillate parents and six selected genotypes derived from open pollination of ‘Uralskij Champion’ were used as pollinate parents. Blackspot was the most serious disease, followed by leaf spot, whereas powdery mildew and rust were rare. Significant differences between families with different staminate parents were found for blackspot, leaf spot and powdery mildew, indicating the possibility to select for resistance to these diseases in seedlings from crosses involving section Caninae in spite of the Canina meiosis. |
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