Grape Variety: RS-9

Variety Name	RS-9
Common Synonyms	McKenry RS-9
All Synonyms	McKenry RS-9
Countries of Origin	USA
Species	Interspecific hybrid (champinii; riparia; rupestris)
Breeder	David Ramming, Michael McKenry
Institution	USDA-ARS (Fresno, CA) & UC Riverside
Year Released	2003
Status of Ownership	Patent held by University of California
Pedigree	Ramsey x Schwarzmann
References	Show 1 reference Hide references UCCE, From the Vine (September, 2005). Link
Uses	Rootstock
Comments	This selection features broad-spectrum resistance to nematodes. RS-9 has a lower vigor that is most likely better suited to coastal valleys. It exhibits good resistance to root knot nematodes, Xiphenema index, and root lesion. It may be considered in cooler regions where ectoparasitic nematodes predominate. More details can be found in Foundation Plant Services' 2001 Grape Program Newsletter.

RS-9 PhotosClick photo to enlarge

	RS-9 [01] (proprietary)
Registration Status	Provisional
Source	Mike McKenry, Kearney Agricultural Center, California
Proprietary	Proprietary- cannot be distributed without written permission from owner.
Comments	This selection underwent microshoot tip tissue culture therapy in 2012 and successfully qualified for the Russell Ranch Foundation Vineyard in 2013.