Chirpan 539

Active

Gossypium L. Cotton · Agricultural · bred by M. Bozhinov, L. Bozhinova, B. Bozhinov

also searched as: чирпан 539

Variety description

10 August 2026

The variety belongs to the early-maturing category and serves as a standard sample for assessing earliness and productivity. It possesses good fiber quality indicators: average fiber length is about 31.4 mm, and fiber turnout is 38.8%.

The variety is characterized by adaptability to various growing conditions, including organic farming and non-irrigated plots. When water stress occurs during the flowering and boll formation phase, the variety demonstrates a decrease in productivity at the level of other varieties.

Bred by the method of intraspecific hybridization and is widely used as breeding material. For a long time, it maintained the status of a reference variety in Bulgaria due to its stability.

Sources5

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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.

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

active no record

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

Parties

Breeder: M. Bozhinov, L. Bozhinova, B. Bozhinov 4 Developed the variety
Applicant: Institute of Cotton and Durum Wheat - Chirpan (BG) 38 Submitted the application to the register
Rights holder: Institute of Cotton and Durum Wheat - Chirpan (BG) 38 Holds the rights to the variety
Maintainer: BG - INSTITUTE OF AGRICULTURE CROPS 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

№ 214167

Registration

8 May 2001
BG Bulgaria Active

№ 2865/147

Application

8 May 2001

Registration

30 November 2001

Registry	Number	Application	Registration	Terminated	Status
QZ European Union	214167	—	8 May 2001	—	Active
BG Bulgaria	2865/147	8 May 2001	30 November 2001	—	Active

Plant breeders' rights

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

Bulgaria № 11

Terminated

Application filed 8 May 2001
Registered 30 November 2001
Currently active indefinite in the register

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

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Breeder

M. Bozhinov, L. Bozhinova, B. Bozhinov All 4 varieties of company

Registry records

Total records: 3
Jurisdictions shown: 2
First registration: 2001

Same species

Other varieties: Cotton

All 507 varieties of species

ST 373

Active

Gossypium L. · Cotton

3 records

Vega

Protection expired

Gossypium L. · Cotton

A. Saldzhieva, I. Saldzhiev

3 records

ST 488

Active

Gossypium L. · Cotton

2 records

Celestia

Terminated

Gossypium L. · Cotton

1 record

Celia

Active

Gossypium L. · Cotton

2 records

Chirpan 603

Terminated

Gossypium L. · Cotton

M. Bozhinov, L. Bozhinova, B. Bozhinov

3 records

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