Variety traits
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.
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.
Zea mays L. · Maize
Kyrpa Mykola IAkovych, Smetanko Ol`ha Andriivna, Marochko Valentyna Anatoliivna, Hrabovs`kyi Mykola Borysovych, Serheiev Vasyl` Viktorovych, Moroz Volodymyr Vasyl`ovych, Antoniuk Serhii Petrovych, Cherchel Vladyslav IUriiovych, Dziubetskyi Borys Volodymyr
Zea mays L. · Maize
Hanhur Volodymyr Vasyl`ovych, Bodenko Natalia Anatoliivna, Mel`nychuk Ol`ha Serhiivna, Koval` Oleksandr Mykolaiovych, Voskoboinyk Oleksandr Vasyl`ovych, Hlushko Vasyl` Vasyl`ovych, Antoniuk Serhii Petrovych, Cherchel Vladyslav IUriiovych, Dziubetskyi Bory
Sorghum bicolor (L.) Moench · Sorghum
Chykaliuk Peter Bohdan
Zea mays L. · Maize
Fedorenko Eduard Mykolaiovych, Hanhur Volodymyr Vasyl`ovych, Satarova Tetiana Mykolaivna, Riabchenko Eduard Mykolaiovych, Nehoda Tetiana Volodymyrivna, Marochko Valentyna Anatoliivna, Olizko Oleksii Petrovych, Antoniuk Serhii Petrovych, Cherchel Vladysla
Zea mays L. · Maize
Ol`khovyk Maksym Styanislavovych, Riabchenko Eduard Mykolaiovych, Bondar Tetiana Mykolaivna, Plotka Vitalii Vitaliiovych, Nehoda Tetiana Volodymyrovych, Haidash Oleksandr Leonidovych, Olizko Oleksii Petrovych, Fedko Mykola Mykolaiovych, Cherchel Vladyslav
Zea mays L. · Maize
Riabchenko Olha Pavlivna, Derkach Kateryna Viktorivna, Bebekh Alina Vasylivna, Ilchenko Larysa Anatoliivna, Olizko Oleksii Petrovych, Bondar Tetiana Mykolaivna, Haidash Oleksandr Leonidovych, Bodenko Natalia Anatoliivna, Cherchel Vladyslav IUriiovych, Dzi
Zea mays L. · Maize
Kyrpa Mykola IAkovych, Halechko Ivan Dmytrovych, Husak IUliia Viktorivna, Bondar` Tetiana Mykolaivna, Kupar Ivan Mykhailovych, Bodenko Natalia Anatoliivna, Il`chenko Larisa Anatoliivna, Fed`ko Mykola Mykolaiovych, Cherchel` Vladyslav IUriiovych, Dziubets`
Vicia faba L. · Broad bean
Agri-Obtentions S.A., Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)
Zea mays L. · Maize
Vicia faba L. · Broad bean
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Spinacia oleracea L. · Spinach
Cucumis sativus L. · Cucumber
Vicia faba L. var. major Harz · Broad bean
Beta vulgaris Garden Beet Group · Garden beet
Capsicum annuum L. · Bell pepper
Phleum pratense L. · Timothy grass
Spinacia oleracea L. · Spinach
Oryza sativa L. · Rice
Oryza sativa L. · Rice
Brassica oleracea L. (Brussels Sprouts Group) · Brussels sprouts
Triticum aestivum L. · Bread wheat
Cucurbita pepo L. · Field pumpkin
Pisum sativum L. · Pea