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.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
HAZERA SEEDS B.V., IL
Lactuca sativa L. · Lettuce
Harris Moran Seed Company
Cucurbita pepo L. · Field pumpkin
UNITED GENETICS SEEDS CO
Hordeum vulgare L. · Barley
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Consejo Superior de Investigaciones Científicas (CSIC), Institut de Recerca í Tecnologia Agroalimentàries (IRTA), Instituto Tecnológico Agrario de Castilla y León (ITACYL)
Lolium perenne L. · Perennial ryegrass
Barenbrug USA
Hordeum vulgare L. · Barley
SEMILLAS BATLLE, S.A.
Glycine max (L.) Merr. · Soybean
Poljoprivredni Institut Osijek, HR
Cucumis melo L. · Melon
Syngenta Seeds B.V.
Cucurbita pepo L. · Field pumpkin
HM.CLAUSE
Zea mays L. · Maize
Monsanto Technology, USA
Cucumis melo L. · Melon
Sakata Seed Corporation, JP
Gossypium hirsutum L. · Upland cotton
PROGEN SEED INC.
Lactuca sativa L. · Lettuce
Enza Zaden Seed Operations B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Nunhems B.V.
Helianthus annuus L. · Sunflower
VERNEUIL RECHERCHE
Solanum lycopersicum L. · Tomato
SEMO a.s
Brassica napus var. napus · Rapeseed
Deutsche Saatveredelung AG - DSV (DE)
Beta vulgaris Sugar Beet Group · Sugar beet
Sesvanderhave, B
Lactuca sativa L. · Lettuce
Gautier Semences SAS (FR)
Gossypium hirsutum L. · Upland cotton
DELTA&PINE LAND HOLDING
Hordeum vulgare L. · Barley
Poljoprivredni Institut Osijek, HR
Brassica napus var. napus · Rapeseed
Monsanto Agriculture France SAS (FR)
Linum usitatissimum L. · Common flax
Linéa Semences de Lin G.I.E.
Hybrids between Citrus x aurantium L. x Citrus trifoliata L.