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. (Collard Group) · Collard greens
JAMES HUTTON LTD
Beta vulgaris Sugar Beet Group · Sugar beet
Strube D&S GMBH
Vitis vinifera L. · Common grape vine
Institut Francais de la Vigne et du Vin
Hordeum vulgare L. · Barley
Hodowla Roslin Smolice Sp.z o.o Grupa IHAR
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
UNITED GENETICS SEEDS CO
Cucumis sativus L. · Cucumber
SEMILLAS FITO, S.A.
Hybrids between Citrus x aurantium L. x Citrus trifoliata L.
Zea mays L. subsp. mays (Maize Group) · Maize
Semences Cargill SA (FR)
Solanum lycopersicum L. · Tomato
Harris Moran Seed Company
Cucumis sativus L. · Cucumber
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Triticum durum Desf. · Durum wheat
IRTA (G. CATALUÑA)
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Beta vulgaris Sugar Beet Group · Sugar beet
Betaseed
Beta vulgaris Sugar Beet Group · Sugar beet
Betaseed
Citrus x insitorum Mabb.
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Beta vulgaris Sugar Beet Group · Sugar beet
Betaseed
Allium cepa L. var. cepa · Onion
CROOKHAM COMPANY
Triticum durum Desf. · Durum wheat
IRTA (G. CATALUÑA)
Cucumis melo L. · Melon
UNITED GENETICS SEEDS CO
Prunus x fontanesiana (Spach) C. K. Schneid.
Lyle A. BROOKS (US)
Trifolium michelianum Savi · Balansa clover
Seeds Genetics International Pty Ltd (AU)
Beta vulgaris Sugar Beet Group · Sugar beet
Strube D&S GMBH
Helianthus annuus L. · Sunflower
Nicolae Parvu
Beta vulgaris Sugar Beet Group · Sugar beet
WIELKOPOLSKA HODOWLA BURAKA CUKROWEGO SP.Z.O.O