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
MONSANTO TECHNOLOGY
Solanum lycopersicum L. · Tomato
HEBREW UNI/HAZERA
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Bejo Zaden B.V.
Helianthus annuus L. · Sunflower
AGROMAR MARMARA TARIM ÜRÜNLERI SAN VE TIC. A.S.
Beta vulgaris Fodder Beet Group · Mangelwurzel
DLF SEEDS A/S
Avena sativa L. · Oat
Landwirtschaftliche Fachschule Edelhof Saatzucht
Brassica oleracea L. (White Cabbage Group) · White cabbage
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Allium cepa L. · Onion
ISI SEMENTI S.P.A
Beta vulgaris Sugar Beet Group · Sugar beet
STRUBE GmbH&Co.KG, DE
Zea mays L. · Maize
BORYSOV VIKTOR
Brassica oleracea L. (White Cabbage Group) · White cabbage
Twan Groot
Beta vulgaris Sugar Beet Group · Sugar beet
SESVanderHave N.V./S.A. (BE)
Triticum aestivum L. · Bread wheat
Poznanska Hodowla Roslin Sp. z o.o
Cichorium intybus L. (Industrial Chicory Group) · Chicory
Florimond Desprez Veuve et Fils, FR
Solanum lycopersicum L. · Tomato
Szkola Glowna Gospodarstwa Wiejskiego
Raphanus sativus L. var. sativus · Radish
Hazera Seeds B.V.
Zea mays L. subsp. mays (Maize Group) · Maize
Dow AgroSciences GmbH, DE
Trifolium repens L. · White clover
Cebeco Handelsraad (NL)
Vicia faba L. var. minuta (hort. ex Alef.) Mansf. · Tick Bean
P.H. Petersen Saatzucht Lundsgaard GmbH (DE)
Zea mays L. · Maize
Stephane Melkior
Helianthus annuus L. · Sunflower
SEMENCES CARGILL
Beta vulgaris Sugar Beet Group · Sugar beet
Betaseed
Helianthus annuus L. · Sunflower
KOIPESOL SEMILLAS, S.A.
Beta vulgaris Sugar Beet Group · Sugar beet
Betaseed Inc. (US)