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.
Glycine max (L.) Merr. · Soybean
RAGT 2N, France
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Solanum lycopersicum L. · Tomato
Domaine Public (FR)
Brassica napus L. · Rapeseed
NICKERSON INTERNATIONAL RESEARCH SNC
Solanum lycopersicum L. · Tomato
Nunhems B.V.
Solanum lycopersicum L. · Tomato
Sativa coop (IT)
Solanum lycopersicum L. · Tomato
Rene Khenkuet
Solanum lycopersicum L. · Tomato
DE RUITER SEEDS
Solanum lycopersicum L. · Tomato
Fryts Kherlaar
Solanum lycopersicum L. · Tomato
Sunseeds Genetics (US)
Solanum lycopersicum L. · Tomato
Rijk Zwaan B.V. (NL)
Solanum lycopersicum L. · Tomato
Vilmorin SA (FR)
Solanum lycopersicum L. · Tomato
SEMO S.R.O.
Solanum lycopersicum L. · Tomato
HM.CLAUSE
Solanum lycopersicum L. · Tomato
Cora Seeds SRL, I
Fagopyrum esculentum Moench · Buckwheat
P.H. Petersen Saatzucht Lundsgaard GmbH, Grudhof DE
Solanum lycopersicum L. · Tomato
DE RUITER SEEDS
Solanum lycopersicum L. · Tomato
HEBREW UNIVERSITY
Solanum lycopersicum L. · Tomato
Petr Klapste
Solanum lycopersicum L. · Tomato
Nunhems BV (NL)
Solanum lycopersicum L. · Tomato
Enza Zaden BV (NL)
Solanum lycopersicum L. · Tomato
Dutch American Plantbreeders Corp.
Solanum lycopersicum L. · Tomato
Vilmorin & Cie
Solanum lycopersicum L. · Tomato
SATIMEX QUEDLINBURG HANDELSGESELLSCHAFT GmbH