Project Number: 5302-21220-005-02
Project Type: Specific Cooperative Agreement

Start Date: Sep 28, 2007
End Date: Jul 14, 2009

Objective:
Develop PD resistant table and raisin grape germplasm/varieties with fruit quality equivalent to standards of present day varieties. Develop molecular markers for Xf/PD resistance in a family (SEUS) other than those from V. arizonica.

Approach:
Backcross hybrids [(V.rupestris x V. arizonica) x V. vinifera seedless table and raisin grapes] that have been selected for Pierce's Disease (PD) resistance to high quality V. vinifera seedless table and raisin grapes. 2) Hybridize bunch grapes from the southeastern U.S. that have PD resistance as shown by greenhouse tests with high quality V. vinifera seedless table and raisin grapes. 3) Embryo rescue will be used to facilitate the use of seedless plants as parents. Seedling will be propagated to conduct greenhouse screening for PD and field evaluation of fruit characteristics simultaneously. 4) 170 plants from V. vinifera x. Southeast U.S. resistant material will be evaluated in the greenhouse for resistance to PD. SSR primers will be used to develop markers to detect resistant genotypes. Formerly 5302-21220-004-18S (08/2008).