Variety traits
Tolerance is the ability of a variety to maintain productivity and crop quality when exposed to pathogens or abiotic stresses. Unlike resistant varieties, tolerant plants are affected by infection but compensate for the damage without significant yield loss.
Mentioned in descriptions 20 866 varieties reference book.
Variety tolerance is the ability of a plant to withstand pathogen infection or the influence of abiotic factors, such as drought or salinity, without a significant decrease in productivity. In contrast to resistance, where the plant blocks the development of the pathogen, a tolerant variety becomes infected and bears signs of the disease, yet its physiological processes allow it to maintain a satisfactory yield level.
Tolerance assessment is conducted under disease pressure conditions by comparing the yield of varieties with the same degree of infection. When analyzing diseases, rating scales are used, where varieties with a high degree of infection but an insignificant drop in yield are classified as tolerant. Physiological indicators of resistance to abiotic stresses include data on germination, root system development, and the condition of the photosynthetic apparatus.
The complex trait of tolerance is expressed through the yield reduction coefficient: the lower the drop in productivity under strong factor impact, the higher the indicator. It is agronomically important that tolerant varieties act as latent carriers of pathogens, contributing to their accumulation in the field, which requires increased attention to phytosanitary monitoring even when plants appear healthy.
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. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION US
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Solanum lycopersicum L. · Tomato
Joon-Hyung Anh
Triticum aestivum L. · Bread wheat
TAYLOR MIKE
Cucumis sativus L. · Cucumber
Yan Kulstra
Festuca rubra L. · Red fescue
PURE SEED TESTING
Agrostis stolonifera L. · Creeping bentgrass
PURE SEED TESTING
Cucumis sativus L. · Cucumber
Hari Besels
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Naumov Ruslan Olehovych, Krasniuk Viacheslav Anatoliiovych,
Ocimum basilicum L. · Basil
GENESIS SEED LTD
Trifolium pratense L. · Red clover
Shtoiko Liubov Mykhailovych, Bortnovskyi Vitalii Mykolaiovych, Petrychenko Vasyl Florovych, Scherbyna Liudmyla Petrivna, Kul`ka Vira Petrivna, Buhaiov Vasyl Dmytrovych,
Crocosmia Planch. · Montbretia
T.J.M. Leenen
Solanum lycopersicum L. · Tomato
Sytnychenko Serhii Mykolaiovych
Zea mays L. subsp. mays (Maize Group) · Maize
HILLESHOG - NK SPA
Glycine max (L.) Merr. · Soybean
Marchenko Tetiana IUriivna, Biliaieva Iryna Mykolaivna, Klubuk Viktor Vasylovych, Borovyk Vira Oleksandrivna, Vozhehova Raisa Anatoliivna,
Solanum lycopersicum L. · Tomato
Her Bimsdeboer
Tulipa L. · Tulip
Van Schagen Tulips B.V.
Secale cereale x secale montanum
BUNDESREPUBLIK QUEDLINBURG| Bundesrepublik Deutschland, vertreten durch Julius Kuehn-Institut, Bundesfor-schungsinstitut f.Kulturpflanzen
Helianthus annuus L. · Sunflower
Pioneer Hi-Bred International Inc (US)
Juniperus x pfitzeriana (Späth) P. A. Schmidt · Pfitzer juniper
Vorobiova Olena Anatoliivna
Cucumis sativus L. · Cucumber
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Beta vulgaris Sugar Beet Group · Sugar beet
SESVANDERHAVE NV-SA, BE
Cucumis sativus L. · Cucumber
Instytut Warzywnictwa im. Emila Chroboczka
Zea mays L. subsp. mays (Maize Group) · Maize
KWS SAAT SE&CO.KGaA, DE