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.
Helianthus annuus L. · Sunflower
Rene Baratin
Triticum aestivum L. · Bread wheat
LIDEA FRANCE SAS
Cucumis sativus L. · Cucumber
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Raphanus sativus L. var. sativus · Radish
Ger Beemsterboer
Festuca rubra L. · Red fescue
Jönsson Hans Arne
Solanum lycopersicum L. · Tomato
Nirit Seeds Ltd (IL)
Sinapis alba L. · White mustard
Pietrzak sp. z o.o. sp. k.
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Cucumis sativus L. · Cucumber
MORAVOSEED CZ A.S.
Allium cepa L. · Onion
ENZA ZADEN
Helianthus annuus L. · Sunflower
RAGT Czech s.r.o.,CZ
Lolium x hybridum Hausskn. · Hybrid ryegrass
P.BREED.INST.WALES
Triticum aestivum L. · Bread wheat
Florimond Desprez Veuve et Fils, FR
Pisum sativum L. · Pea
SYNGENTA CROP PROTECTION AG / SYNGENTA CROP PROTECTION AG
Solanum lycopersicum L. · Tomato
SYNGENTA SEEDS B.V.
Beta vulgaris Sugar Beet Group · Sugar beet
Maribo Seed International ApS
Sorghum bicolor (L.) Moench · Sorghum
PIONEER HI-BRED INTERNATIONAL
Zea mays L. · Maize
Pioneer Overseas Corporation, Pioneer Hi-Bred International Inc.
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Zea mays L. · Maize
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
Nicolae Boaghe, Elena Andreea Teodorescu
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Daucus carota L. · Carrot
ROGER FREEMAN
Brassica napus var. napus · Rapeseed
Andreas Gertz