Durable resistance in grapevine: MAS-based gene pyramiding and comparison of two powdery mildew resistance genes of Vitis vinifera origin
Informations
- Funding country
Hungary- Acronym
- -
- URL
- -
- Start date
- 6/1/2008
- End date
- 5/31/2011
- Budget
- 32,620 EUR
Fundings
| Name | Role | Start | End | Amount |
|---|---|---|---|---|
| Postdoctoral Programme | Grant | 6/1/2008 | 5/31/2011 | 32,620 EUR |
Abstract
Production of varieties carrying durable resistance is the main goal of resistance breeding. Durable resistance can be controlled either by one gene or can be the result of several genes. Resistance breeding in viticulture aims at producing cultivars resistant to powdery (PM) and downy mildew (DM). Since no V. vinifera cultivars carrying PM resistance genes were found till the mid 1960-ies, wild Vitis species were applied as resistance gene sources. Muscadinia rotundifolia is an excellent resistance gene source carrying the Run1 dominant PM resistance gene and the Rpv1 major DM resistance genes. A (M. rotundifolia x V. vinifera) BC4 hybrid got in Hungary in 1996 and was applied in crosses with V. vinifera cultivars. However the V. vinifera cultivars is classified as susceptible, different cultivars show varying levels of susceptibility. 'Dzsandzsal kara' was described first as PM resistant V. vinifera cultivar, and was also involved in breeding. Kishmish vatkana is also a PM resistant V. vinifera cultivar, and it was also crossed with the BC4 by Kozma et al. (BC5). PM resistance gene of 'Kishmish vatkana' was identified as Ren1. The PM resistance gene of 'Dzsandzsal kara' is still unkknown. Our first goal is to apply multiplex PCR for the simoultanous screening for Run1/Ren1/Rpv1 genotypes in segregating populations deriving from the cross BC4 x 'Kishmish vatkana'. Second aim is the comparison of PM resistance genes of 'Kishmis vatkana' and 'Dzsandzsal kara'.