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 napus var. napus · Rapeseed
Norddeutsche, D
Brassica napus var. napus · Rapeseed
Reinhard Hemker
Beta vulgaris Sugar Beet Group · Sugar beet
SYNGENTA SEEDS, A.B.
Zea mays L. · Maize
PIONEER OVERSEAS CORPORATION
Brassica napus L. · Rapeseed
Reinhard Hemker
Daucus carota L. · Carrot
Bejo Zaden BV (NL)
Daucus carota L. · Carrot
HM.CLAUSE
Triticum aestivum L. · Bread wheat
Nordsaat Saatzucht GmbH, D-38895 Langenstein, OT Bohnshausen
Triticum aestivum L. · Bread wheat
Secobra Saatzucht
Zea mays L. · Maize
PIONEER| Pioneer Hi-Bred Services GmbH
Secale cereale L. · Rye
P.H. Petersen Saatzucht Lundsgaard GmbH (DE)
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
Helianthus annuus L. · Sunflower
Syngenta Participations,CH
Zea mays L. · Maize
Pioneer Overseas Cor, USA
Secale cereale L. · Rye
PETERSEN| Asmus Soeren Petersen in Fa. P.H. Petersen Saatzucht Lundsgaard GmbH & Co KG
Triticum aestivum L. · Bread wheat
Limagrain Europe SA (FR)
Brassica napus var. napus · Rapeseed
SVALOF AB
Hordeum vulgare L. · Barley
Nordic Seed A/S
Helianthus annuus L. · Sunflower
Euralis Semences, F
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Rijk Zwaan, NL
Triticum aestivum L. · Bread wheat
Saaten-Union
Brassica rapa L. subsp. pekinensis (Lour.) Hanelt · Napa cabbage
SSC JP
Helianthus annuus L. · Sunflower
Syngenta Crop Protection AG, CH
Hordeum vulgare L. · Barley
Secobra Saatzucht