ISHS Acta Horticulturae 1100: III International Symposium on Molecular Markers in Horticulture
SELECTING DISEASE RESISTANT PLANT MATERIAL FOR APPLE AND GRAPEVINE BREEDING |
| Authors: | T. Letschka, E. Zini, C. Kerschbamer, J. Terleth, W. Guerra, B. Raifer |
| Keywords: | Malus × domestica, Vitis vinifera, marker assisted selection, pyramidisation |
| DOI: | 10.17660/ActaHortic.2015.1100.27 |
| Abstract:
Fungal diseases are the main treatment targets in both apple and grapevine cultivation. The availability and combination of highly tolerant or moderately susceptible accessions can be a valuable option to improve the control of these diseases in the respect of the environment. In apple, the breeding programme of Laimburg Research Centre was so far focused on quality traits. Starting with 2013, marker-assisted seedling selection (MASS) is performed to identify resistances against scab, powdery mildew or fireblight. A continuously optimised genotyping procedure is focused on a maximal time and cost efficiency, allowing a high throughput of seedlings to be analysed. Selected plants will account for both the development of new resistant varieties and the creation of future pyramidised breeding material. In grapevine, a disease resistant collection is going to be created in collaboration with private platforms and nurseries, with interesting hybrids released by breeding programmes around the World. In order to select the parents segregating for resistance genes for new crosses, the collection is going to be screened with markers correlated with downy and powdery mildew resistance (marker-assisted parental selection, MAPS). Resistances to other less prevalent diseases have been considered, including Pierce’s disease, crown gall and phylloxera. Bioassays under controlled inoculation are planned to provide a better understanding of the stability of the disease resistance as a function of the genetic background and environment. | |
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