Variety traits
Determinacy is a genetically determined plant growth habit where development is limited by the formation of a specific number of inflorescences. This trait defines bush architecture, maturation rates, and crop management strategies.
Mentioned in descriptions 12 519 varieties reference book.
Determinacy characterizes a plant's ability to cease vegetative growth after setting a fixed number of inflorescences, terminating in an apical flower cluster. Unlike indeterminate varieties that continue to develop throughout the season, determinate forms are distinguished by their compactness and focus on an early transition to the generative phase.
The trait defines the cultivation strategy by ensuring concentrated fruit set, which simplifies mechanized harvesting. This growth type requires specific agrotechniques, as improper pruning can lead to reduced productivity, while the plants themselves often do not require intensive staking.
The evaluation of determinacy during variety testing is conducted through field observations of plant architecture. Agronomists record the number of leaves to the first cluster, total plant height, and the terminal number of inflorescences on the main stem, classifying the variety on a scale from super-determinate to indeterminate forms.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Cucumis sativus L. · Cucumber
Paul Degreef
Solanum lycopersicum L. · Tomato
Steven Schroeder
Cucumis sativus L. · Cucumber
Bejo Zaden, NL
Lolium perenne L. · Perennial ryegrass
Theodorus P.M. op den Kamp
Solanum lycopersicum L. · Tomato
Nunhnes B.V
Glycine max (L.) Merr. · Soybean
Saatzucht Donau GmbH & Co.KG
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Nunhems B.V., 6083 AB Nunhem
Solanum tuberosum L. · Potato
IPR B.V.
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
Glycine max (L.) Merr. · Soybean
MILADINOVIC JEGOR / VIDIC MILOS
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
Nunhems B.V.
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Cucumis sativus L. · Cucumber
SYNGENTA SEEDS B.V.
Phaseolus vulgaris L. · Common bean
W BROTHERTON SEED CO INC
Phaseolus vulgaris L. · Common bean
W BROTHERTON SEED CO INC
Solanum lycopersicum L. · Tomato
NUNHEMS ZADEN
Glycine max (L.) Merr. · Soybean
SAS Lidea France (FR)
Glycine max (L.) Merr. · Soybean
SAS Lidea France (FR)
Glycine max (L.) Merr. · Soybean
Patrice Jeanson
Glycine max (L.) Merr. · Soybean
Lidea France SAS, Lescar FR