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.
Triticum aestivum L. · Bread wheat
I. Panayotov, G. Petrov, I. Todorov, P. Petkova, D. Boyadzhieva, A. Dimov, P. Stankova, V. Vasilev, P. Stoycheva
Hordeum vulgare L. · Barley
Poljoprivredni Institut Osijek, HR
Helianthus annuus L. · Sunflower
SEMILLAS BATLLE S.A.
Festuca rubra L. · Red fescue
Barenbrug Holland BV (NL)
Cucurbita maxima Duchesne · Giant pumpkin
Johnny's Selected Seeds
Plantago lanceolata L. · Ribwort plantain
Norwest Seed LTD
Secale cereale L. · Rye
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
Phaseolus vulgaris L. · Common bean
NOVARTIS SEEDS
Triticum aestivum L. · Bread wheat
Bc Institut d.d. Zagreb (HR)
Lolium perenne L. · Perennial ryegrass
Capsicum annuum L. · Bell pepper
UNITED GENETICS ITALIA S.P.A
Oryza sativa L. · Rice
Simonne dr. Kiss Ibolya / Heszky Laszlo
Brassica oleracea L. (Brussels Sprouts Group) · Brussels sprouts
Syngenta Seeds B.V.
Phaseolus vulgaris L. · Common bean
NOVARTIS SEEDS
Triticum aestivum L. · Bread wheat
Poljoprivredni Institut Osijek, HR
Zea mays L. · Maize
Monsanto Technology, USA
Helianthus annuus L. · Sunflower
Cvejic Sandra, Jocic Sinisa,
Lactuca sativa L. · Lettuce
SHAMROCK SEED COMPANY
Triticum aestivum L. · Bread wheat
Zouliamis Nikolaos
Festuca ovina L. · Sheep's fescue
PURE SEED TESTING
Dactylis glomerata L. · Cocksfoot
Hodowla Roslin Grunwald Sp. z.o.o. Grupa IHAR
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Triticum durum Desf. · Durum wheat
SEMILLAS BATLLE S.A.
Festuca arundinacea Schreb. · Tall fescue
DLF Seeds A-S, DK