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United States Department of Agriculture

Agricultural Research Service

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Research Project: Breeding Pierce’s Disease Resistant Table and Raisin Grapes and the Development of Markers for Additional Sources of Resistance

Location: Crop Diseases, Pests and Genetics Research

Project Number: 5302-22000-010-11-R
Project Type: Reimbursable Cooperative Agreement

Start Date: Jul 1, 2011
End Date: Jun 30, 2013

Develop Pierce's disease (PD) resistant table and raisin grape germplasm/cultivars with fruit quality equivalent to present day standards. Develop molecular map and markers for Xf/PD resistance based on resistance from BD5-117 selection from southeastern United States.

1) Backcross the most advanced resistant hybrids (V. arizonica and BD5-117 sources of resistance) to high quality V. vinifera seedless table and raisin grapes. 2) Use embryo rescue to facilitate the hybridization of seedless parents. 3) Use molecular markers to select resistant V. arizonica backcross seedlings. 4) Select seedlings with highest fruit quality in the field and verify resistance by greenhouse inoculation. 5) Field test best resistant selections for PD resistance under natural and inoculated conditions. 6) Establish production and quality trials of selections with commercial potential. 7) Develop molecular map of BD5-117 family to locate PD resistant QTL and associated molecular markers. Documents reimbursable agreement with the University of California Pierce’s Disease Research Grants Program.

Last Modified: 06/25/2017
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