Róna 4

Terminated

Sorghum bicolor (L.) Moench Sorghum · Agricultural · bred by Siklosine dr. Rajki Erzsebet / Benke Jozsefne / Farago Lajos / Kazi Ignac

also searched as: рона 4

Variety description

10 August 2026

The variety belongs to the sweet sorghum type and is used primarily as a high-yielding crop for silage production. Due to a refractometric sugar content at the level of 15–17% in the juicy stalks, the variety ensures high-quality feed, promoting better lactic acid fermentation.

The plant is a mid-maturing hybrid and possesses a developed root system that exceeds the root system of maize in volume, ensuring effective utilization of moisture and nutrients from the soil. The variety exhibits high drought tolerance, demonstrating stability in green mass yield during dry periods, and is responsive to nitrogen fertilizer application.

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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

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.

Rona 4 primary HU, QM
Rona-4 HU

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: Siklosine dr. Rajki Erzsebet / Benke Jozsefne / Farago Lajos / Kazi Ignac Developed the variety
Applicant: Gabonatermesztesi Kutato Intezet Submitted the application to the register
Maintainer: Gabonatermesztesi Kutato Kht. 81 Responsible for variety maintenance

Admission to trade

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

HU Hungary Terminated

№ 109941

Application

5 February 1987

Registration

31 May 1989

Terminated

14 December 2004

Registry	Number	Application	Registration	Terminated	Status
HU Hungary	109941	5 February 1987	31 May 1989	14 December 2004	Terminated

Plant breeders' rights

The right is granted for a limited term: propagation of the variety requires a license from the rights holder.

Hungary № 1358/88

Terminated

Application filed 18 March 1988
Registered —
Entry closed 6 November 2002

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

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