Choju

Protection expired

Pyrus pyrifolia (Burm. f.) Nakai Japanese pear · Fruit crops · bred by INCONNU (FR)

also searched as: чойу

Variety description

10 August 2026

The Choju variety (also known as Ichiban Nashi) is a diploid variety developed in Japan. Agronomic studies note a low density of lenticels on the plant's one-year-old shoots.

The fruits are of the russet skin type. The variety is used in horticulture to obtain yields in early terms and is also applied in breeding programs to study the genetic characteristics of fruit quality and texture.

In field trials, the variety showed resistance to scab, however, it was recorded as highly susceptible to fire blight caused by Erwinia amylovora.

Sources6

Loading…

The list of sources is loaded via script—please enable JavaScript.

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.

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: INCONNU (FR) 2 336 Developed the variety
Applicant: INCONNU (FR) 2 336 Submitted the application to the register
Maintainer: (Inconnu) (FR) 2 336 Responsible for variety maintenance

Admission to trade

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

FR France Protection expired

№ 0092582

Application

1 June 1989

Registration

1 January 1989

Terminated

31 December 2009

Registry	Number	Application	Registration	Terminated	Status
FR France	0092582	1 June 1989	1 January 1989	31 December 2009	Protection expired

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

Breeder

INCONNU (FR)

breeder code CHOJU

All 2 336 varieties of company

Registry records

Total records: 1
Jurisdictions shown: 1
First registration: 1989

Same species