Grape Variety: UCD GRN-5

Variety Name	UCD GRN-5
Common Synonyms	9407-14
All Synonyms	9407-14, Walker 9407-14
Countries of Origin	USA
Species	Includes Vitis champinii, Vitis berlandieri
Breeder	Dr. Andy Walker
Institution	University of California, Davis
Year Released	2008
Status of Ownership	Proprietary to the UC Regents
Pedigree	Several species, including V. champinii 'Ramsey', c9021(a form of V. champinii that appears to intergrade with V. berlandieri), Vitis riparia
Uses	Rootstock
Comments	This selection has strong and broad nematode resistance derived from V. champinii 'Ramsey' and from c9021 (a form of V. champinii that appears to intergrade with V. berlandieri). This selection has excellent root-knot and dagger nematode resistance, resists citrus and lesion nematodes, and supports low numbers of ring nematodes. This rootstock supported the highest level of nodosity-based phylloxera. Vitis riparia was used to improve the rooting and grafting of cuttings. Cuttings produce moderately sized roots with relatively deep rooting angles.

UCD GRN-5 Selections

	UCD GRN-5 [01.1] (proprietary)
Registration Status	Registered
Source	Department of Viticulture & Enology, University of California, Davis
Proprietary	Proprietary- cannot be distributed without written permission from owner.
Comments	This selection was developed by University of California, Davis, Viticulture Professor Andy Walker and was released in 2008. It was formerly known as 9407-14 (Walker 9407-14). For a complete explanation of the selections in this series, see the article entitled 'Walker Nematode-resistant Rootstock Releases' in the October 2008 FPS Grape Program Newsletter at http://fps.ucdavis.edu/, in the Publications section. The original material underwent microshoot tip tissue culture therapy in 2010 in order to qualify for the Russell Ranch Foundation Vineyard, where it was planted in 2012 as UCD GRN-5™ FPS 01.1.