Grape Variety: Millardet et de Grasset 420A

Variety Name	Millardet et de Grasset 420A
Common Synonyms	420 A
All Synonyms	MGT 420A, 420A Mgt, 420A Millardet et de Grasset, Kober 420A, Millardet et Grasset 420A
Countries of Origin	France
Species	Interspecific cross
Breeder	Alexis Millardet and Charles de Grasset
Institution	Private breeders
Year Released	1887
Pedigree	V. berlandieri x V. riparia
References	Show 4 references Hide references Galet, P. 1998. Grape Varieties and Rootstock Varieties. Oenoplurimedia sarl. Chateau de Chaintre, France. Pongracz, D.P. 1983. Rootstocks for Grape-vines. David Philip, Cape Town, South Africa. Vitis International Variety Catalogue (VIVC). Federal Centre for Breeding Research on Cultivated Plants (BAZ). Institute for Grapevine Breeding Geilweilerhof (IRZ). August, 2007. Link The former National Grape Registry (NGR) was initially compiled and annotated using the earlier version of the Vitis database. The VIVC underwent a significant update beginning in 2007. Corresponding updates to this Registry will be made as necessary. Galet, Pierre. 1998. Grape Varieties and Rootstock Varieties. Oenoplurimédia sarl, Château de Chaintré, Chaintré, France.
Uses	Rootstock

Millardet et de Grasset 420A PhotosClick photo to enlarge

	Millardet et de Grasset 420A [04]
Registration Status	Registered
Source	Lombardy, Italy
Comments	This selection came to FPS in 1962 from the Instituto di Patologia Vegetale della Universita in Milan, Italy. It was assigned USDA Plant Introduction number 279058-B-1 when it entered the United States. The original material first qualified for planting in the foundation vineyard in 1967 as FPS 04. Selection 04 underwent microshoot tip tissue culture therapy at FPS in 2012 to qualify for the Russell Ranch Foundation Vineyard. The treated material successfully completed testing to qualify for that vineyard in 2013.
	Millardet et de Grasset 420A [241] (proprietary)
Registration Status	Registered
Source	Authorized French clone 241 from ENTAV-INRA, France
Proprietary	Proprietary- cannot be distributed without written permission from owner.
Comments	This proprietary clone came to Foundation Plant Services in 2010 from the ENTAV-INRA program in France. It is authorized French clone 241. The original material successfully completed testing for the California Grapevine Registration & Certification Program in 2016. The original material also underwent microshoot tip tissue culture therapy at FPS in 2010 to qualify for the Russell Ranch Foundation Vineyard, which it did in 2016.