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Imprint
Identification of 'quality'-chromosomes in Vitis for early diagnosis of wine quality
Project
Project code: JKI-ZR-08-5183
Contract period: 01.09.2013
- 31.08.2016
Purpose of research: Applied research
Considerable efforts in grapevine breeding during recent decades led to new cultivars with resistance characteristics which allow a substantial reduction of plant protection measurements. However the procedure of resistance breeding is interminable. This is especially due to the fact that wild species used as resistance donors exhibit negative quality traits. Therefore several backcross generations are necessary in order to keep the resistance and to improve quality in a way that it is comparable with the quality of traditional V.vinifera cultivars. In the past this selection process was exclusively based on the evaluation of the breeding material for resistance as well as for wine quality over multiple years in field trials. Meanwhile for the mildew diseases molecular markers are available which allow a targeted resistance screening for seedlings already in an early growing stage. The application of this marker assisted selection allows moreover the combination of different resistance loci in order to an expected improvement of resistance sustainability. In this project the principal aim is to improve selection efficiency by establishing marker assisted selection also for the characteristic 'wine quality'. Therefore within appropriate crossing combinations those chromosomes resp. genomic regions with negative impact on wine quality shall be identified. Identified genomic regions - possibly whole chromosomes or chromosome sections - can be detected by marker assisted selection and in backcrossing breeding programs those genotypes can be identified were those genomic regions are inherited from the V.vinifera parent. Results will allow a more rapid and a more targeted introgression of resistance characteristics from wild species into the genetic background of V.vinifera with distinct high wine quality.
Section overview
Subjects
- Plant Breeding
- Crop Protection
- Viticulture
