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.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Syngenta Seeds B.V.
Medicago sativa L. · Alfalfa
RAGT 2N S.A.S
Medicago sativa L. · Alfalfa
Seed Technology & Marketing Pty Ltd. (S.T.M.)
Solanum tuberosum L. · Potato
Teagasc
Helianthus annuus L. · Sunflower
SYNGENTA SEEDS A.G.
Lolium perenne L. · Perennial ryegrass
DLF Trifolium A-S, DK
Solanum tuberosum L. · Potato
SAKA PFLANZENZUCHT GMBH AND CO KG
Brassica oleracea L. (White Cabbage Group) · White cabbage
Syngenta Seeds B.V. (NL)
Rhododendron L. · Azalea
PREIL| Dr. Walter Preil im Institut fuer gartenbauliche Pflanzenzuechtung / ELBINGHAUS| Rainer Ebbinghaus im Institut fuer gartenbauliche Pflanzenzuechtung
Glycine max (L.) Merr. · Soybean
INSTYTUT HUDOWLI
Brassica oleracea L. (White Cabbage Group) · White cabbage
VAN DER PLOEG SJAAK
Triticum aestivum L. · Bread wheat
RAGT 2n
Trifolium repens L. · White clover
RAGT 2N S.A.S
Zea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
Lolium perenne L. · Perennial ryegrass
RAGT 2N S.A.S
Brassica oleracea L. (White Cabbage Group) · White cabbage
PRIEUR ROBERT
Agrostis capillaris L. · Common bent
HBLFA Raumberg-Gumpenstein
Trifolium alexandrinum L. · Egyptian clover
PETERSEN| Asmus Soeren Petersen in Fa. P.H. Petersen Saatzucht Lundsgaard GmbH & Co KG
Avena sativa L. · Oat
Pflanzenzucht Oberlimpurg
Cucumis sativus L. · Cucumber
VEGETABLE MONSANTO B.V.
Chrysanthemum L. · Chrysanthemum
VAN DER KNAAP IR. J.
Cucumis sativus L. · Cucumber
Syngenta Seeds B.V.
Helianthus annuus L. · Sunflower
Sadik
Zea mays L. · Maize
Pioneer Overseas Corporation, USA