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.

PR31A34

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

4 records

Pr39a50

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

5 records

Pr31d24

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

5 records

Prismatica

Active

Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon

United Genetics Seeds, USA

5 records

Portodur

Active

Triticum durum Desf. · Durum wheat

Serasem S.A.S.

6 records

Piponero

Active

Helianthus annuus L. · Sunflower

SEMILLAS BATLLE S.A.

4 records

Penn G-6

Active

Agrostis stolonifera L. · Creeping bentgrass

TEE-2-GREEN CORP

5 records

Penn A-4

Active

Agrostis stolonifera L. · Creeping bentgrass

TEE-2-GREEN CORP

5 records

Penneagle II

Active

Agrostis stolonifera L. · Creeping bentgrass

TURF SEED EUROPE LTD

5 records

Phoenix

Active

Daucus carota L. · Carrot

HM Clause, F

4 records

Pharos

Active

Brassica oleracea L. (Broccoli Group) · Broccoli

SSC JP

4 records

P2105

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

7 records

Paragon GLR

Active

Lolium perenne L. · Perennial ryegrass

Rutgers, The State University of New Jersey - Cook College

4 records

P1921

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

5 records

P7326

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

6 records

P1574

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

4 records

Orniferti

Active

Ornithopus sativus Brot. · Serradella

Fertiprado Sementes e Nutrientes Ltda.

5 records

Ozkan

Active

Solanum lycopersicum L. · Tomato

Yuksel Tohum

5 records

Oregrain

Active

Triticum aestivum L. · Bread wheat

Florimond Desprez Veuve et Fils, FR

5 records

NS Zmaj

Active

Helianthus annuus L. · Sunflower

Institut za ratarstvo i povrtarstvo, Novi Sad

5 records

NS Teona

Active

Glycine max (L.) Merr. · Soybean

Institut za ratarstvo i povrtarstvo, Novi Sad

5 records

NS Sanol

Active

Helianthus annuus L. · Sunflower

Institut za ratarstvo i povrtarstvo, Novi Sad

5 records

NS Kiril

Active

Helianthus annuus L. · Sunflower

Institut za ratarstvo i povrtarstvo, Novi Sad

5 records

P1551

Active

Zea mays L. · Maize

Pioneer Overseas Corporation, Pioneer Hi-Bred International Inc.

8 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.