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.

P1672

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

4 records

P1884

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

4 records

Orange Sunrise

Active

Berberis thunbergii DC. · Japanese barberry

Gospodarstwo Szkółkarskie Lucjan i Grzegorz Kurowscy

3 records

P1565

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

3 records

OSO Smart

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Sesvanderhave, B

3 records

P0937Y

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

4 records

P0413E

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

4 records

OS Viva

Active

Trifolium pratense L. · Red clover

Poljoprivredni Institut Osijek, HR

3 records

Papri Queen

Active

Capsicum annuum L. · Bell pepper

Seminis Vegetable Seeds

3 records

Opera

Active

Cucurbita pepo L. · Field pumpkin

HM.Clause S.A.S.

4 records

Pandie

Active

Cichorium endivia L. · Endive

Syngenta Seeds B.V.

6 records

Party Time

Active

Cucumis sativus L. · Cucumber

BURPEE NL B.V.

3 records

Parole

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

7 records

Orelian

Active

Lactuca sativa L. · Lettuce

Syngenta Seeds B.V.

5 records

Operet

Active

Solanum lycopersicum L. · Tomato

Syngenta Seeds, NL

3 records

Pagoda

Terminated

Glycine max (L.) Merr. · Soybean

MONSANTO TECHNOLOGY

3 records

Pantion

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)

4 records

Optimist

Withdrawn

Triticum aestivum L. · Bread wheat

LIMAGRAIN NEDERLAND

4 records

P1902

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

3 records

P0640

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

4 records

Paganini

Active

Oryza sativa L. · Rice

S.I.S. Società Italiana Sementi S.p.A.^^^Caterina Marè^^^Franca Finocchiaro^^^Marco Canella^^^Elisa Zampieri^^^Gianni Tacconi^^^Alessandro Tondelli^^^Stefano Monaco^^^Donata Pagani^^^Giampiero Vale

4 records

Pacer

Application submitted

Triticum aestivum L. · Bread wheat

Nickerson Seeds Ltd (GB)/Nickerson SA (FR)

5 records

Obelisk

Active

Sambucus nigra L. · Elderberry

Bronisław Jan Szmit

3 records

P1916

Active

Zea mays L. · Maize

Pioneer Hi-Bred International, Inc Pioneer Overseas Corporation

4 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.