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Siennus

Active

Lactuca sativa L. Lettuce · Vegetables · bred by Rijk Zwaan Zaadteelt en Zaadhandel B.V.

also searched as: сиеннус

Variety description

10 August 2026

The variety belongs to the light-colored Romaine lettuce (Romana bionda) type. The plant is characterized by strong development, the ability to adapt to low-temperature conditions, and the formation of heads with soft leaves. The rounded shape of the head base with a small and clean cut simplifies the produce packaging process.

The plant possesses a high level of resistance to downy mildew (Bremia lactucae, races Bl:29-37, 39-41EU), Fusarium wilt (Fusarium oxysporum f. sp. lactucae, race Fol:1), and lettuce aphid (Nasonovia ribisnigri, race Nr:0).

Sources2
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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.

QZ

active no record

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

Parties

Breeder
Rijk Zwaan Zaadteelt en Zaadhandel B.V. Developed the variety
Applicant
Rijk Zwaan Zaadteelt en Zaadhandel B.V. Submitted the application to the register
Rights holder
Rijk Zwaan Zaadteelt en Zaadhandel B.V. Holds the rights to the variety
Maintainer
Rijk Zwaan Zaadteelt en Zaadhandel B.V. 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 Active

    № 294555

    Registration
    7 March 2023
  • NL Netherlands Withdrawn

    № SLA4355

    Application
    4 December 2019
    Terminated
    4 May 2020
  • NL Netherlands Active

    № SLA4460

    Application
    4 May 2020
    Registration
    7 March 2023

Plant breeders' rights

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

Netherlands № SLA4355
Withdrawn
  1. Application filed 4 December 2019
  2. Registered
  3. Entry closed 4 May 2020

More 2 records protections in other jurisdictions are shown on the map above.

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

Same species

Other varieties: Lettuce

All 8 226 varieties of species

Lactuca sativa L. · Lettuce

SVS Holland B.V.

DK ES FR IT
14 records

El Sol

Active

Lactuca sativa L. · Lettuce

Nunhems, NL

NL
12 records

Lactuca sativa L. · Lettuce

SYNGENTA SEEDS B.V.

ES
8 records

Sidonie

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

Sidra

Terminated

Lactuca sativa L. · Lettuce

NL
2 records

Sierra

Active

Lactuca sativa L. · Lettuce

VILMORIN, S.A.

ES FR IT
7 records

Nearby in the species list Siberika, Siberinas, Sibila, Sichero, Sicily, Sicio, Sideral, Sidian, Sidonie, Sidra, Sierra, Sifra, Sigla, Siglan, Signal, Signale, Signas, Signorella, Signoris, SIGRUN

Discussion: Siennus

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