420 A

Application submitted

Vitis berlandieri Planch. x Vitis riparia Michx. · Fruit crops · bred by INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE-INRA

also searched as: 420 а

Variety description

10 August 2026

The variety is a specialized rootstock with a male flower type, not intended for berry production. The bushes are characterized by medium vigor, which allows for controlling the excessive development of vigorous scions. The vegetation period of the variety is short, although the rootstock can slightly delay the ripening dates of grafted varieties.

The plant possesses high resistance to the root form of phylloxera, some species of nematodes, and fungal diseases. It tolerates carbonate soils well, withstanding up to 30% total limestone and up to 20% active lime. The variety prefers fertile stony, clay, and loamy soils, but adapts poorly to heavy and waterlogged soils.

When using this rootstock, potassium deficiency may occur in sensitive scion varieties due to the peculiarities of mineral nutrient uptake. The rooting capacity of cuttings is rated as weak, often requiring the use of growth stimulants. Compatibility with scions is satisfactory, sometimes requiring an increase in the stratification period.

Sources6

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Countries of admission

1 jurisdiction

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.

IS FI NO SE EE IE GB DK LV LT NL DE PL BY PT ES FR BE CZ SK UA RU LU CH AT HU MD IT SI HR RS RO MT GR BG CY

terminated no record

Variety registered as early as 1 jurisdiction, data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.

Also known as

A single variety may be registered in different countries under different names. All records are consolidated into one profile based on the breeder's code—an internal number that is identical for the variety across all registries.

420 A primary SI
420A UY

The primary name shown is the one under which the variety is registered in the largest number of jurisdictions. Search finds the variety by any of its names.

Variety in registries Regions of admission, rights holders, and status of plant breeders' rights

Parties

Breeder: Institut National de la Recherche Agronomique -INRA- 54 Developed the variety
Applicant: POMAR S.R.L. Submitted the application to the register
Maintainer: Institut National de la Recherche Agronomique -INRA- 54 Responsible for variety maintenance

Admission to trade

The variety is listed in the national registry — its seeds are authorized for sale in this country.

SI Slovenia Protection expired

№ VP0005

Terminated

1 January 2005
UY Uruguay Application submitted

№ 30202110240667
UY Uruguay Application submitted

№ 2012134

Application

14 August 2012

Registry	Number	Application	Registration	Terminated	Status
SI Slovenia	VP0005	—	—	1 January 2005	Protection expired
UY Uruguay	30202110240667	—	—	—	Application submitted
UY Uruguay	2012134	14 August 2012	—	—	Application submitted

Records are sourced from official registry publications. Data sources and legal status

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Breeder

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE-INRA All 54 varieties of company

Registry records

Total records: 3
Jurisdictions shown: 1
Not yet disclosed: 1

Same species