Variety traits
Solanum lycopersicum L.
The ability of tomato plants to maintain productivity and the integrity of the photosynthetic apparatus at temperatures above optimal, which is critically important for pollen fertility and fruit set.
In the reference 14 varieties crop Tomato, where this is mentioned in the description.
Tomato heat tolerance is evaluated by the ability to maintain stable pollen fertility and fruit set at daytime temperatures above 26 °C and nighttime temperatures above 20 °C. Highly resistant genotypes are characterized by efficient maintenance of water status, a well-developed root system, and the preservation of photosystem II activity, which prevents chlorophyll degradation and loss of turgor.
Diagnostic procedures for the trait include laboratory testing of seedlings at 35–43 °C, determination of free proline levels, membrane electrolyte leakage, and photosynthetic rate. Field evaluation is based on calculating resistance coefficients relative to classifier varieties, assessing the percentage of fruit set, and measuring morphological root parameters.
Exposure of tomato plants to high temperatures leads to pollen sterility, flower abortion, and reduced fruit quality. Accelerated respiration processes and metabolic exhaustion under stress require breeding material to possess complex adaptation at all stages of ontogenesis, as resistance during the vegetative phase does not always correlate with the reproductive phase.
General information about the subject — on the page Heat tolerance.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Solanum lycopersicum L. · Tomato
HM.CLAUSE
Solanum lycopersicum L. · Tomato
IP MASHTAKOV ALEKSEJ ALEKSEEVICH
Solanum lycopersicum L. · Tomato
Rene Khenkuet
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Solanum lycopersicum L. · Tomato
Bejo Zaden B.V.
Solanum lycopersicum L. · Tomato
Ikasido Global Group BV, NL
Solanum lycopersicum L. · Tomato
HAZERA SEEDS BV
Solanum lycopersicum L. · Tomato
Bejo Zaden B.V.
Solanum lycopersicum L. · Tomato
SAKATA SEED AMERICA INC US
Solanum lycopersicum L. · Tomato
Y³ksel Tohum Tarim San. ve Tic A.S.
Solanum lycopersicum L. · Tomato
INCONNU (FR)
Solanum lycopersicum L. · Tomato
Domaine Public (FR)
Solanum lycopersicum L. · Tomato
Hem Zaden B.V.
Solanum lycopersicum L. · Tomato
Hem Zaden B.V.
Solanum lycopersicum L. · Tomato
Hem Zaden B.V.
Solanum lycopersicum L. · Tomato
Hem Zaden B.V.
Solanum lycopersicum L. · Tomato
Domaine Public (FR)
Solanum lycopersicum L. · Tomato
HAZERA GENETICS
Solanum lycopersicum L. · Tomato
Hazera Genetics Ltd (IL)
Solanum lycopersicum L. · Tomato
Graines Gautier SA (FR)
Solanum lycopersicum L. · Tomato
HM.Clause S.A.S.
Solanum lycopersicum L. · Tomato
HAZERA GENET./YISSUM RESE
Solanum lycopersicum L. · Tomato
NIRIT SEEDS