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SR 4500

Active

Lolium perenne L. Perennial ryegrass · Agricultural · bred by SEED RESEARCH OF OREGON

also searched as: ср 4500

Variety description

10 August 2026

The variety is intended for the creation of high-quality turf cover. It possesses high turf density, fine leaf texture, and a saturated dark green color. The plant is capable of rapid rooting and effective recovery after mechanical damage.

The plant possesses high genetically determined resistance to rust, gray leaf spot, red thread, and other fungal infections. A high level of endophyte content ensures natural protection against pests and increased stress tolerance during the summer period.

The variety finds application in professional landscaping, including sports grounds and golf courses. It is also effective in the creation of grass mixtures and is used for winter overseeding (sowing into dormant warm-season grass).

Sources2
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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.

Variety registered as early as 1 jurisdiction, data for which we do not publish: their registry licenses have not yet been verified.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

  • SR 4500 primary QM, US
  • SR4500 IT

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
SEED RESEARCH OF OREGON 76 Developed the variety
Applicant
SEED RESEARCH OF OREGON 76 Submitted the application to the register
Maintainer
SEED RESEARCH OF OREGON 76 Responsible for variety maintenance

Admission to trade

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

  • IT Italy Active

    № 009977_A 009977

    Application
    9 July 2004

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 № 200100211
Active
  1. Application filed 8 June 2001
  2. Registered 27 September 2004
  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?

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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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Lolium perenne L. · Perennial ryegrass

Seed Research of Oregon & Rutgers, The State University of New Jersey

IT
4 records

Nearby in the species list Sponsor, Sport, Springfield, Sprinter, Sputknik, Sputnik, Spyglass, SR 4220, SR 4400, SR 4420, SR 4600, Sr 4700, Sr 4750, Stabilo, Stadion, Stamina, Stanford, Stanley, Stann, Stanza

Discussion: SR 4500

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