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Keystone

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Lolium perenne L. Perennial ryegrass · Agricultural · bred by Rutgers, The State University of New Jersey

also searched as: кеистоне

Variety description

10 August 2026

The variety belongs to the group of lawn grasses and is used in grass mixtures, including for professional golf courses and regions with hot, arid climates. The plant is characterized by a rich dark green color and high wear resistance.

Breeding work to improve the variety is aimed at increasing resistance to such diseases as gray leaf spot, dollar spot, red thread, and crown rust.

Sources5
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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.

terminated no record

Variety registered as early as 2 jurisdictions, data for which we do not publish: their registry licenses have not yet been verified.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
Rutgers, The State University of New Jersey 122 Developed the variety
Applicant
Rutgers, The State University of New Jersey 122 Submitted the application to the register
Maintainer
IT - DLF-TRIFOLIUM A/S Responsible for variety maintenance

Admission to trade

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

  • QZ European Union Terminated

    № 204963

    Registration
    16 February 2004
    Terminated
    23 July 2021
  • IT Italy Terminated

    № 008009_A 008009

    Application
    5 January 2001
    Registration
    18 February 2004
    Terminated
    23 July 2021
  • RU Russian Federation Active

    № 55458

    Application
    29 November 2010
    Registration
    25 January 2011

Plant breeders' rights

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

United States of America № 200400124
Active
  1. Application filed 23 February 2004
  2. Registered 25 March 2011
  3. Currently active indefinite in the register

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

Same species

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Nearby in the species list Kergaval, Kerry, Kertak, Kerval, Keswick, Ketari, Ketario 1, Ketarion 1, Keteku 1, Keystar, Keystone 2, Khaya, Kiani, Kilaro 1, Kilian, Kilkeel, Kilkenny, Kilrea, Kimber, Kimberley

Discussion: Keystone

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