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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.

PTG18

Active

Pittosporum Banks et Soland. ex Gaertn. · Pittosporum

John Stanley Ritchie, Kathleen Anne Ritchie

2 records

P1570y

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

2 records

Obelisk

Active

Prunus laurocerasus L. · Cherry laurel

Bernd Steinegger

3 records

Padre

Active

Chrysanthemum L. · Chrysanthemum

Pieters Plant Production B.V.B.A.

2 records

P2105y

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

4 records

P0710Y

Active

Zea mays L. · Maize

PIONEER OVERSEAS CORPORATION

2 records

Pachafvel

Active

Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium

Hofmann Christa|Radeburg, DE

2 records

P9400Y

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

2 records

Notwoodthree

Active

Hibiscus syriacus L. · Rose of Sharon

Woods Roderick

2 records

Peto 285

Protection expired

Apium graveolens L. var. dulce (Mill.) Pers. · Celery

Seminis Vegetable Seeds

2 records

Mulberry Ruffles

Active

Lavandula stoechas L. · French lavender

Plant Growers Australia Pty Ltd

2 records

Morfeo

Active

Ulmus L. · Elm

Alberto Santini^^^Fabio Ferrini^^^Francesco Pecori

2 records

Moonshine

Active

Pulmonaria L. · Lungwort

TERRA NOVA NURSERIES INC

2 records

Moncalvo

Active

Populus x canadensis Moench · Carolina poplar

Gianni Allegro^^^Gaetano Castro^^^Gianni Facciotto^^^Lorenzo Vietto^^^Achille Giorcelli^^^Giuseppe Nervo^^^Stefano Bisoffi^^^Maria de los Angeles Gras

2 records

MONARD0039

Active

Monarda didyma L. · Bee balm

Henricus Maria Joseph Holtmaat

2 records

Nebraska

Active

Vicia faba L. · Broad bean

Agri-Obtentions S.A., Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)

3 records

Orion

Active

Populus x canadensis Moench · Carolina poplar

CREA-FL

2 records

Mickie

Active

Cistus x hybridus Pourr.

Pavlich John C.

2 records

Melle

Active

Rhododendron L. · Azalea

Magda De Waele-De Baerdemaeker

2 records

Lisa

Active

Prunus armeniaca L. · Apricot

Danilo Christen Agroscope

2 records

Mingo

Active

Myrtus communis L. · Common myrtle

Michele Fazio

2 records

Lemondrop

Active

Humulus lupulus L. · Common hop

Roger D Jeske

2 records

MAY 344

Active

Gossypium L. · Cotton

2 records

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