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.
Lolium perenne L. · Perennial ryegrass
DLF Trifolium A-S, DK
Malus domestica (Suckow) Borkh. · Apple
Helianthus annuus L. · Sunflower
Olivier Soulie
Lolium perenne L. · Perennial ryegrass
DEUTSCHE SAATVEREDELUNG AG
Brassica napus var. napus · Rapeseed
Norddeutsche, D
Lolium perenne L. · Perennial ryegrass
DLF-TRIFOLIUM DANSK PLANTEFORAEDLING
Lolium x hybridum Hausskn. · Hybrid ryegrass
DLF Seeds A/S, Dansk Planteforedling (DK)
Helianthus annuus L. · Sunflower
Nikolae Parvu
Hordeum vulgare L. · Barley
Syngenta Participations,CH
Helianthus annuus L. · Sunflower
SYNGENTA SEEDS A.G.
Agrostis stolonifera L. · Creeping bentgrass
Loft's Seed Inc. (US)
Vitis vinifera L. · Common grape vine
Gabriele Di Gaspero^^^Guido Cipriani^^^Michele Morgante^^^Enrico Peterlunger^^^Simone Diego Castellarin^^^Raffaele Testolin
Medicago sativa L. · Alfalfa
Florimond Desprez Veuve et Fils, FR
Triticum aestivum L. · Bread wheat
Ragt, F
Helianthus annuus L. · Sunflower
RAGT 2N S.A.S
Helianthus annuus L. · Sunflower
SOLTIS S.A.S
Agrostis stolonifera L. · Creeping bentgrass
Tee-2-Green Corporation
Zea mays L. · Maize
PIONEER OVERSEAS CORPORATION
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
Sakata Vegetables Europe, F
Dactylis glomerata L. · Cocksfoot
Departement of Agriculture
Fragaria x ananassa Duchesne ex Rozier · Garden strawberry
Helianthus annuus L. · Sunflower
Sadik El Sayed
Solanum lycopersicum L. · Tomato
Paul Degreef
Phaseolus vulgaris L. · Common bean
Syngenta Seeds, NL