NK 121

Protection expired

Sorghum bicolor (L.) Moench subsp. bicolor Sorghum · Agricultural · bred by Northrup King Semences SA (FR)

also searched as: нк 121

Variety description

10 August 2026

The NK 121 variety is used in international practice as a reference sample for assessing morphological traits, such as plant height, when conducting tests for distinctness, uniformity and stability. In scientific literature from the late 1970s to the early 1980s, it was used to calibrate genetic coefficients in sorghum growth models and in experiments studying grain productivity and nutritional value.

The name NK is historically associated with the Northrup King brand and is encountered in various contexts, including maize seeds, so it is not a unique identifier. Current agronomic descriptions of the variety as an object of commercial production are absent, as it retains its significance primarily as archival or specialized material for expert assessments.

Sources4

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Countries of admission

3 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.

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

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: SYNGENTA SEEDS A.G. 311 Submitted the application to the register
Rights holder: SYNGENTA SEEDS A.G. 311 Holds the rights to the variety
Maintainer: SYNGENTA SEEDS A.G. 311 Responsible for variety maintenance

Admission to trade

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

ES Spain Terminated

№ 19770405

Application

2 February 1977

Registration

30 June 1979

Terminated

17 July 1998
FR France Protection expired

№ 0091667

Application

25 April 1988

Registration

1 January 1973

Terminated

1 January 1992

Registry	Number	Application	Registration	Terminated	Status
ES Spain	19770405	2 February 1977	30 June 1979	17 July 1998	Terminated
FR France	0091667	25 April 1988	1 January 1973	1 January 1992	Protection expired

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

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Breeder

Northrup King Semences SA (FR)

breeder code NK 121

All 209 varieties of company

Registry records

Total records: 2
Jurisdictions shown: 3
First registration: 1973

Same species