Variety traits

Cold tolerance

Cold tolerance is a biological characteristic of a variety that determines its ability to develop and maintain productivity under prolonged exposure to low positive temperatures (from +1 to +10 °C).

Mentioned in descriptions 2 844 varieties reference book.

Cold tolerance represents the ability of an organism to maintain normal metabolism, protoplasm structure, and enzymatic activity under conditions where thermophilic crops begin to slow growth, yellow, and lose turgor. Unlike winter hardiness, this indicator does not imply the tolerance of sub-zero temperatures and freezing of tissues. In practice, a cold-tolerant variety allows for early sowing in unheated soil, reduces the risk of seedling death during spring cold snaps, contributes to the efficient use of winter moisture, and accelerates development, which often leads to earlier maturity.

Field and laboratory evaluation methods are used during variety testing. The field methodology includes phenological observations of growth rates during early sowing, visual assessment of survival after temperature stress, and structural analysis of the impact of conditions on yield components. In laboratory settings, a 'cold test' is used for seed germination in incubators at reduced temperatures followed by further growth, as well as biochemical analysis, such as determining the level of free proline in leaves.

Cold tolerance is expressed through a coefficient calculated as the ratio of performance in stress conditions to control conditions, or through percentage values of germination. Based on these data, varieties are divided into groups by resistance level. An important indicator is the temperature minimum at which crop growth ceases, which is about +4 °C for most plants and up to +10 °C for maize. Variety selection requires consideration of the biological characteristics of the crop, as this trait is critical for thermophilic plants at the early development stage.

Sources10

Breakdown by crop

Cold tolerance of maize 73 Cold tolerance of lettuce 19 Cold tolerance — soybean 15 Cold tolerance of maize 13 Cold tolerance of pea 11 Cold tolerance of endive 10 Cold tolerance of chicory 9 Cold tolerance of cucumber 9 Tomato cold tolerance 9 Cold tolerance of parsley 8 Cold tolerance of sunflower 8 Cold tolerance of spinach 7 Cold tolerance of turnip 7 Cold tolerance — Leek 7 Cold tolerance of carrots 7 Cold tolerance — soft wheat 7 Cold Hardiness of Savoy Cabbage 6 Cold tolerance — white cabbage 6 Cold tolerance — fava bean 5 Cold tolerance of faba beans 5 Cold tolerance — Black radish 5 Cold resistance of radish 5 Cold tolerance of Anthurium andraeanum 5 Cold tolerance of rice 5

Found in these crops

Maize 261 Maize 75 Olive 51 Anthurium 35 Lettuce 27 Sunflower 27 Tomato 24 Cucumber 24 Soybean 21 Leek 17 Chicory 15 Cauliflower 15

Varieties that feature this in their description

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.

Tonachi

Terminated

Zea mays L. · Maize

ASGROW SEED COMPANY

2 records

Tritonas

Active

Cucumis sativus L. · Cucumber

Syngenta Seeds B.V.

2 records

Tor

Active

Zea mays L. · Maize

Breus Oksana Serhiivna, Parii IUliia Oleksandrivna, Parii Fedir Mykytovych, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,

3 records

Tador

Protection expired

Zea mays L. subsp. mays (Maize Group) · Maize

Northrup King Semences SA (FR)

3 records

SV4522NB

Active

Allium fistulosum L. · Welsh onion

Bayer Holland B.V.

4 records

SV3523VC

Active

Spinacia oleracea L. · Spinach

Bayer Holland B.V.

3 records

SY Cortigo

Terminated

Zea mays L. · Maize

Syngenta Crop Protection AG

2 records

Sultana

Active

Olea europaea L. · Olive

Diego Barranco Navero^^^Concepción Muñoz Díez^^^Carlos Trapero Ramírez^^^Pedro Valverde Caballero

3 records

SV4129TH

Active

Solanum lycopersicum L. · Tomato

Monsanto Vegetable IP Management B.V.

4 records

Stine 9401

Active

Zea mays L. · Maize

Harry Stine

3 records

Sofia

Active

Vicia faba L. var. major Harz · Broad bean

SEMILLAS FITO, S.A.

3 records

Sivert

Terminated

Oryza sativa L. · Rice

IVIA (DPTO. ARROZ)/INIA

3 records

Sikitita 2

Active

Olea europaea L. · Olive

Universidad de Córdoba^^^Instituto Andaluz de Investigación y Formación Agraria Pesquera y Alimentaria (IFAPA)^^^Luis Rallo Romero^^^Diego Barranco Navero^^^Raúl de la Rosa Navarro^^^Lorenzo León Moreno^^^Concepción Muñoz Díez^^^Diego Cabello Pozo

2 records

Skif

Active

Anethum graveolens L. · Dill

NEVKRYTAYa NATAL'Ya VLADIMIROVNA / AFANAS'EVA EVGENIYa SERGEEVNA

2 records

Serrallonga

Active

Lolium multiflorum Lam. · Italian ryegrass

Semillas El Solc

2 records

S274 SV

Active

Zea mays L. · Maize

Rysin Artur Leonidovych

3 records

Saint Antoine

Active

Lactuca sativa L. · Lettuce

Domaine Public (FR)

2 records

Sacromonte

Terminated

Lactuca sativa L. · Lettuce

ROCALBA, S.A.

2 records

Sabine

Active

Olea europaea L. · Olive

INCONNU (FR)

2 records

Rubis

Protection expired

Glycine max (L.) Merr. · Soybean

Caussade Semences SA (FR)/DAIRYLAND SEED Co Inc. (US)

3 records

Santimo

Active

Zea mays L. · Maize

FREIHERR VON MOREAU SAATZUCHT

2 records

Rouge oreilles du diable

Active

Lactuca sativa L. · Lettuce

Domaine Public (FR)

2 records

Rocxi CS

Terminated

Zea mays L. · Maize

CAUSSADE SEMENCES

2 records

Roksi

Active

Zea mays L. · Maize

Melnyk Taras Vitaliiovych, Melnyk Vitalii IAkovych,

3 records

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Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.