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
Guenter Seitz
Helianthus annuus L. · Sunflower
LIDEA FRANCE SAS
Helianthus annuus L. · Sunflower
RAGT 2N S.A.S
Helianthus annuus L. · Sunflower
MAS SEEDS
Helianthus annuus L. · Sunflower
Olivier Soulie
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
LIDEA FRANCE SAS
Helianthus annuus L. · Sunflower
NUSEED EUROPE
Helianthus annuus L. · Sunflower
Euralis Semences
Poa pratensis L. · Kentucky bluegrass
DLF Seeds A/S
Helianthus annuus L. · Sunflower
Olivier Soulie
Beta vulgaris Sugar Beet Group · Sugar beet
Betaseed Inc. (US)
Zea mays L. · Maize
PIONEER OVERSEAS CORPORATION
Helianthus annuus L. · Sunflower
Syngenta participation AG
Hordeum vulgare L. · Barley
SYNGENTA SEEDS A.G.
Triticum aestivum L. · Bread wheat
RAGT 2N S.A.S
Helianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
Glycine max (L.) Merr. · Soybean
Patrice Jeanson
Lolium perenne L. · Perennial ryegrass
Innoseeds B.V. (NL)
Gossypium hirsutum L. · Upland cotton
Progen Tohum A.s.
Brassica napus var. napus · Rapeseed
Norddeutsche Pflanzenzucht Hans Georg Lembke KG,DE
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Zoldesegtermesztesi Kutato Intezet RT (HU)
Zea mays L. · Maize
Syngenta Crop Protection,CH
Helianthus annuus L. · Sunflower
SYNGENTA FRANCE S.A.S.