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Sunking 256

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Helianthus annuus L. Sunflower · Agricultural · bred by Northrup King Semences SA (FR)

also searched as: сункинг 256

Variety description

10 August 2026

The hybrid is a subject of archival scientific research. In publications, it is referred to as a standard for conducting experiments, particularly when studying resistance to Sclerotinia.

Detailed agronomic and morphological characteristics, such as plant height, yield, or maturity group, are not presented in available sources. The hybrid was also used in laboratory work to study seed viability and germination under various temperature and humidity regimes.

Sources4
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Countries of admission

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.

QM

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Variety registered as early as 1 jurisdiction, data for which we do not publish: their registry licenses have not yet been verified.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.

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

Parties

Breeder
Northrup King Semences SA (FR) 209 Developed the variety
Applicant
Northrup King Semences SA (FR) 209 Submitted the application to the register
Rights holder
Northrup King Semences SA (FR) 209 Holds the rights to the variety
Maintainer
Syngenta Seeds Inc. 11 925 Responsible for variety maintenance

Admission to trade

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

  • GB United Kingdom Terminated

    № 85/7

    Terminated
    1 July 1991
  • FR France Terminated

    № 0058314

    Application
    15 January 1985
    Registration
    1 January 1987
    Terminated
    1 January 1995

Plant breeders' rights

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

France № 6133
Terminated
  1. Application filed 20 June 1986
  2. Registered 26 March 1987
  3. Entry closed 18 March 1993

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

Found an error in the record?

The directory replicates the primary source. If an entry differs from the official publication, please specify the discrepancy and provide a link if possible. Corrections are added to the moderation queue.

This is a directory, not an official registry: data is based on public disclosures and may have changed. More about sources

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Nearby in the species list Sunflora CL, Sungold, SUNGRO 2010, SUNGRO 372 A, SUNGRO 378, Sungro 385, Sungro 393, Sunil, Sunimax, Sunita, Sunko, Sunlight, Sunlite, Sunmay, Sunny, Sunny IMI, Sunnybird, Sunrich, Sunrich Provence, Sunrock 25

Discussion: Sunking 256

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