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.

MAS 82OL

Active

Helianthus annuus L. · Sunflower

MAS SEEDS

3 records

Mignone

Active

Lactuca sativa L. · Lettuce

Vilmorin, F

4 records

Marvex OL

Terminated

Helianthus annuus L. · Sunflower

MAS SEEDS

3 records

Merlot

Active

Festuca rubra L. · Red fescue

NJAES

4 records

Mérinos

Active

Linum usitatissimum L. · Common flax

Linéa Semences de Lin G.I.E.

4 records

Mihaela

Active

Medicago sativa L. · Alfalfa

SCHITEA MARIAMARTURA TEODORVARGA PAUL MIHAIL

4 records

Méthéor

Terminated

Helianthus annuus L. · Sunflower

Mais Angevin (FR)

3 records

Mieluna

Active

Cucurbita moschata Duchesne · Butternut squash

Sakata Seed Sudamerica Ltda. (SDA)

5 records

Malua

Application submitted

Lactuca sativa L. · Lettuce

Vilmorin-Mikado SAS (FR)

3 records

Manoir

Terminated

Festuca rubra L. · Red fescue

Clause Semences SA (FR)

3 records

Mandolin

Active

Spinacia oleracea L. · Spinach

Pop Vriend Research B.V.

3 records

Mazur

Active

Lactuca sativa L. · Lettuce

HAZERA SEEDS B.V.

5 records

Mabel

Active

Solanum melongena L. · Eggplant

FRITS HERLAAR

4 records

Malaga

Active

Cucumis melo L. · Melon

W. LEGUTKO PRZEDSIEBIORSTWO HODOWLANO NASIENNE SP.Z.O.O

4 records

Maksimus

Active

Cucumis sativus L. · Cucumber

PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.

3 records

Makeba

Active

Cichorium endivia L. · Endive

HM.Clause S.A.S.

6 records

Mahonia

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

6 records

Martinus

Active

Brassica oleracea L. (Brussels Sprouts Group) · Brussels sprouts

Syngenta Seeds B.V.

6 records

M 4

Active

Malus domestica (Suckow) Borkh. · Apple

3 records

Maxivesa

Active

Vicia sativa L. · Common vetch

SEMILLAS BATLLE S.A.

3 records

Lucena

Active

Cucumis sativus L. · Cucumber

SEMILLAS FITO, S.A.

4 records

Martez

Active

Solanum lycopersicum L. · Tomato

Monstanto, NL

4 records

Majesty

Active

Lolium perenne L. · Perennial ryegrass

Jonathan Green & Sons, Inc., Cascade International Seed Company

3 records

Mariner

Active

Capsicum annuum L. · Bell pepper

CLAUSE, S.A.

3 records

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Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.