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Variety traits

Tolerance

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.

Sources10

Breakdown by crop

Maize tolerance 721 Sunflower tolerance 633 Maize tolerance 361 Tolerance — Sugar Beet 354 Tolerance — soft wheat 336 Tolerance in Lettuce 236 Tomato Tolerance 234 Cucumber tolerance 204 Rapeseed tolerance 168 Tolerance in White Cabbage 140 Pepper Tolerance 122 Barley tolerance 119 Tolerance — Soybean 117 Bean tolerance 81 Rapeseed tolerance 74 Potato tolerance 71 Rose tolerance 64 Zucchini Tolerance 61 Melon tolerance 61 Plum tolerance 58 Grapevine Tolerance 56 Peach tolerance 55 Pea tolerance 55 Triticale Tolerance 54

Found in these crops

Maize 718 Sunflower 670 Sugar beet 368 Bread wheat 342 Tomato 336 Maize 322 Cucumber 309 Lettuce 301 Rapeseed 190 Bell pepper 189 White cabbage 180 Perennial ryegrass 139

Varieties that feature this in their description

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.

Morelia

Active

Daucus carota L. · Carrot

Rijk Zwaan Welver, D

NL
4 records

Montis

Active

Solanum tuberosum L. · Potato

Interseed Potatoes GmbH

DE
6 records

Merengue

Active

Cucumis sativus L. · Cucumber

SVS HOLLAND BV , NL

NL
4 records

Meccearly

Active

Phaseolus vulgaris L. · Common bean

Blumen Group S.p.A. (IT)

FR
5 records

Matejko

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Instytut Hodowli i Aklimatyzacji Roslin Panstwowy Instytut Badawczy

PL
6 records

Masetti

Active

Capsicum annuum L. · Bell pepper

Silvester de Nooijer

NL
5 records

Mission

Active

Festuca rubra L. · Red fescue

Euro Grass Breeding GmbH Co. KG

DE
6 records

Mirza

Active

Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn

May Agro Tohumculuk SAN. TIC. AŞ., Turkey

BG
4 records

Marquise

Active

Linum usitatissimum L. · Common flax

Linéa Semences de Lin G.I.E.

FR
6 records

MHR Promienna

Active

Triticum aestivum L. · Bread wheat

MHR SEEDS LIMITED

PL
6 records

Malibu

Active

Lolium perenne L. · Perennial ryegrass

DLF SEEDS A/S

DE
4 records

Marco Aurelio

Active

Triticum durum Desf. · Durum wheat

S.I.S. SOCIETA' ITALIANA SEMENTI

IT
5 records

Meccano

Active

Phaseolus vulgaris L. · Common bean

OLTER SRL

IT
5 records

Mafalda

Active

Lactuca sativa L. · Lettuce

Panora s.p.a.

NL
7 records

Magestium

Active

Cucumis melo L. · Melon

NUNHEMS

NL
6 records

Meara

Active

Lolium perenne L. · Perennial ryegrass

DLF SEEDS A/S

NL
5 records

M200

Active

Malus Mill. · Apple

NIAB EMR (GB)

FR
4 records

Matilda

Active

Cucurbita moschata Duchesne · Butternut squash

GRAHAM DYCHE

UA
6 records

Lifeguard

Active

Festuca arundinacea Schreb. · Tall fescue

PURE SEED TESTING

CZ
4 records

Liprior

Protection expired

Lolium perenne L. · Perennial ryegrass

DEUTSCHE SAATVEREDELUNG AG

DE
6 records

Lyanna

Active

Lolium perenne L. · Perennial ryegrass

DLF SEEDS A/S

DE
5 records

Limabel

Active

Triticum aestivum L. · Bread wheat

NICKERSON INTERNATIONAL RESEARCH SNC

BE
6 records

Leprechaun

Active

Festuca arundinacea Schreb. · Tall fescue

ROBERTS SEED COMPANY (US)

FR
4 records

Mae

Active

Cucumis melo L. · Melon

HM Clause SA (FR)

FR
4 records

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