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.

Gabby

Terminated

Kalanchoe Adans. · Kalanchoe

Knud Jepsen

1 record

Epika

Active

Allium cepa L. var. cepa · Onion

CORA SEEDS S.R.L

2 records

Hilskyl

Terminated

Dianthus caryophyllus L. · Carnation

HilverdaFlorist B.V.

1 record

Flowers of Sulphur

Terminated

Epimedium L. · Barrenwort

ANTHONY ROBIN WHITE|SUSAN BARBARA WHITE

1 record

Gabriella

Application submitted

Euphorbia milii Des Moul. · Crown of thorns

Knud Jepsen A/S

1 record

G14527

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Geoplant Vivai S.r.l. Società Agricola

2 records

DREWQ2

Terminated

Kalanchoe Adans. · Kalanchoe

Knud Jepsen

1 record

Hachblau

Active

Ilex x meserveae S. Y. Hu · Meserve holly

Holger Hachmann

1 record

DICZ0001

Terminated

Dianthus plumarius L. · Garden pink

Syngenta Crop Protection AG

1 record

Diablotina

Active

Prunus persica (L.) Batsch · Peach

PSB Producción Vegetal S.L

2 records

Garibaldi

Active

Ocimum basilicum L. · Basil

CORA SEEDS S.R.L

1 record

Dertum B

Active

Vitis vinifera L. · Common grape vine

Donato Antonacci

1 record

Gallianum B

Withdrawn

Vitis vinifera L. · Common grape vine

Rocco Perniola^^^Donato Antonacci^^^Carlo Bergamini^^^Maria Francesca Cardone^^^Lucia Rosaria Forleo^^^Antonio Domenico Marsico^^^Riccardo Velasco

2 records

Delrouniparf

Active

Rosa L. · Rose

Société Nouvelle Pépinières et Roseraies Georges Delbard S.A.S.

1 record

ERFZ0008

Active

Erysimum linifolium (Pers.) J. Gay · Wallflower

Syngenta Crop Protection AG

1 record

Forever Young

Application submitted

Thuja occidentalis L. · Northern white-cedar

Frank Schnupper

1 record

Dvina

Terminated

Populus deltoides W. Bartram ex Marshall · Eastern cottonwood

CREA-FL

1 record

DANVER1786

Terminated

Verbena L. · Vervain

Gavriel Danziger

1 record

Fuente Umbría

Active

Ulmus minor Mill. · Field elm

Dirección General de Desarrollo Rural y Política Forestal, Unidad de Anatomía Fisiología y Genética Forestal

1 record

Firestar

Terminated

Vitis vinifera L. · Common grape vine

Stargrow Cultivar Development Pty Ltd

1 record

FERCAHUN

Active

Prunus avium (L.) L. · Sweet cherry

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

1 record

Fanfare

Terminated

Hippeastrum Herb. · Amaryllis

Hadeco (Pty) Ltd.

1 record

CL134904R

Terminated

Brassica napus var. napus · Rapeseed

Agrigenetics Inc. D/B/A Mycogen Seeds

1 record

DLFBERI1

Active

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

1 record

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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.