ISHS Acta Horticulturae 743: XXII International Eucarpia Symposium, Section Ornamentals, Breeding for Beauty - Part II
INTEGRATED PROCESS FOR TESTING POWDERY MILDEW RESISTANCE IN ROSE BREEDING |
| Authors: | F. Ferrero, N. Ballino, Y. Jacob |
| Keywords: | powdery mildew, Sphaerotheca pannosa, rose tree, Rosa, resistance, sensitivity |
| Abstract:
Powdery mildew is the major economic depreciatory foliar disease for production of cut roses. The responsible of the symptoms is an external fungus : Sphaerotheca pannosa var. rosae. During the process for selection of the new cultivars, breeders need to estimate the level of resistance inside their plant material, either for parents or for new genotypes. This paper describes the combined processes for screening resistance and sensitivity. In the one hand, the preliminary steps of the method showed the necessity to carry out suitable technics for the isolation of the inoculum and following for the obtainment of monoconidial isolates. In the other hand, the approach led to a biological test performed in Petri dishes on excised rose leaflets. | |
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