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.
Pisum sativum L. · Pea
SYNGENTA SEEDS B.V. / SYNGENTA SEEDS B.V. / INRA MAROC / INRA MAROC / Vilmorin
Poa pratensis L. · Kentucky bluegrass
PENDING
Lactuca sativa L. · Lettuce
ENZA ZADEN
Festuca arundinacea Schreb. · Tall fescue
Deutsche Saatveredelung AG - DSV (DE)
Capsicum annuum L. · Bell pepper
ESASEM SPA
Lolium perenne L. · Perennial ryegrass
SEMILLAS FITO' S.A.
x Triticosecale Wittm. ex A. Camus · Triticale
RAGT 2N S.A.S
Poa pratensis L. · Kentucky bluegrass
PURE SEED TESTING
Triticum durum Desf. · Durum wheat
RAGT 2N S.A.S
Medicago sativa L. · Alfalfa
RAGT 2N S.A.S
Brassica oleracea L. (Red Cabbage Group) · Red cabbage
Syngenta Seeds B.V.
Triticum aestivum L. · Bread wheat
Syngenta UK Ltd
Festuca arundinacea Schreb. · Tall fescue
Peak Plant Genetics, LLC & Rutgers, The State University of New Jersey
Phaseolus vulgaris L. · Common bean
Syngenta Seeds
Festuca arundinacea Schreb. · Tall fescue
DLF Pickseed USA, Inc. and Rutgers, The State University of New Jersey
Festuca arundinacea Schreb. · Tall fescue
LEBANON TURF
Pisum sativum L. · Pea
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Oryza sativa L. · Rice
LOUISIANA STATE UNIVERSITY
Allium fistulosum L. · Welsh onion
TOKITA SEMENTI ITALIA SRL, IT
Beta vulgaris Garden Beet Group · Garden beet
BEJO ZADEN
Lactuca sativa L. · Lettuce
Vilmorin-Mikado S.A.S.
Cucumis sativus L. · Cucumber
Bayer Holland B.V.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Syngenta Seeds B.V.
Poa pratensis L. · Kentucky bluegrass
J. R. Simplot Company and Jacklin Seed