RS-9
ActiveVitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
10 August 2026
The variety is an interspecific hybrid containing genes of Vitis labrusca, Vitis lincecumii, Vitis riparia, Vitis rupestris, and Vitis vinifera. Genetic analyses identify it as a hybrid of Seibel 8724 and Plantet, although there are versions suggesting a cross between Seibel 5474 and Chardonnay.
Bunches are small or medium, elongated-cylindrical, and winged. Berries are small, round, white with a possible pinkish tint; the flesh is pulpy. The variety requires grafting onto rootstock and short pruning.
The plant is classified as moderately resistant: it possesses resistance to downy mildew but is sensitive to powdery mildew, anthracnose, and gray mold. Winter hardiness is low. Wines from this grape resemble Chardonnay in style but are prone to oxidation.
2 jurisdictions
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
The variety is listed in the national registry — its seeds are authorized for sale in this country.
№ 1035528
№ Ravat blanc B*FR
Records are sourced from official registry publications. Data sources and legal status
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Same species
Vitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
Vitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
Vitis L. · Grapevine
David W.Cain
Vitis L. · Grapevine
Vitis L. · Grapevine
Vitis L. · Grapevine
INCONNU (FR)
Nearby in the species list Ramsey, Ran Hamburski ISK, Ranac Silbanjski, Ranchella N, Ranfol, Ranina, Ranno bez seme, Ráthay, Ratinho B, Ratiño de Gallega, Ravat blanc, Ravat blanc B, Rayon d'or, Rayon d'or B, Razaki B, Razaki Kavals B, Razaki mavro N, Razakiya byala, Razakiya cherna, Rdeča muškateljka