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Evaluation of raspberry and strawberry genetic ressources for resistance to spotted wing drosophila (Drosophila suzukii) as base for the supply of resistance cultivars to German fruit production
Project
Project code: JKI-ZGO-08-4187
Contract period: 01.01.2016
- 31.12.2019
Purpose of research: Applied research
Keywords: D. suzukii, genetic ressources, raspberry, strawberry
The spotted-wing drosophila (SWD) is an invasive insect which infest in particular thin-skinned berries as strawberries, raspberries, blackberries, blueberries, gooseberries and currants. Females of Drosophila suzukii attack fresh, ripe fruit by using their saw-like ovipositor to lay eggs under the fruit’s skin. The infestation occurs shortly before harvest and the subsequent larval development makes the fruits unusable for marketing. This can lead to total failure of raspberry plants in heavy infestations. In 2014, many growers have already started to grub up their raspberry plants due to the increasing spread of the pathogen in the region of Lake Constance. The control of the fly is difficult, because it is not possible to keep the waiting time after the application of pesticides. The literature indicates that there are differences in the susceptibility of different varieties in these fruit species. However, there are only a small number of publications, especially from the United States. A sustainable control of D. suzukii can be only assured by the cultivation of resistant or at least little susceptible varieties in soft fruit. Prerequisites for the breeding development of such resistant / little susceptible varieties are that there are genetic differences related to the botanical species or genus and that resistance donors can be identified which can then be used within the framework of intersections. The evaluation of existing genetic resources (varieties and wild species) is the basis of a possible resistance breeding. The aim of the project is the detection of genotypic differences in the susceptibility against the SWD (spotted-wing drosophila) in genetic resources of raspberry and strawberry. Resistant / little susceptible varieties can then be used for breeding or recommended to German growers in infested areas.
Section overview
Subjects
- Plant Breeding
- Crop Protection
- Arboriculture
Framework programme
Funding programme
Excutive institution
Institute for Breeding Research on Horticultural Crops (JKI-ZG)
