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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.

Otelo

Application submitted

Prunus armeniaca L. · Apricot

PSB Producción Vegetal S.L

2 records

Orange Beauty

Terminated

Ilex verticillata (L.) A. Gray · Winterberry

GERRIT A. OUDIJK, ABRAHAM DE JONG

1 record

MERENSKY 5

Application submitted

Persea americana Mill. · Avocado

Sylvie Kremer-Kohne^^^Zelda van Rooyen^^^Stefan Kohne^^^Duncan Smith

1 record

Magic Color

Terminated

Heuchera L. · Coral Flower

Hendrik Jan van den Top

1 record

Melody

Active

Kalanchoe Adans. · Kalanchoe

Knud Jepsen A/S

1 record

Lilaro

Active

Vitis vinifera L. · Common grape vine

Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)

1 record

Minkarl

Terminated

Syringa vulgaris L. · Common lilac

Bernard Fourrier

1 record

Nickels

Withdrawn

Prunus amygdalus x Prunus persica

KESTER DALE E.^^^ASAY RICHARD N.

2 records

Liberty

Terminated

Zantedeschia Spreng. · Arum-lily

Zantedeschiagroep Trendflor V.O.F.

2 records

Loki

Active

Ocimum basilicum L. · Basil

Nunhems Germany GmbH

1 record

KRBEVYE01

Active

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

1 record

Merlin

Active

Allium cepa L. var. cepa · Onion

ALLIUM SEEDS UK LTD

1 record

LEEQ2

Withdrawn

Kalanchoe Adans. · Kalanchoe

Knud Jepsen A/S

1 record

Medunio 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

KLEVP20068

Active

Verbena L. · Vervain

Ruijun Li

1 record

LOWGEKO

Terminated

Veronica L. · Speedwell

Ian J. Ashton

1 record

Little Magic

Withdrawn

Ocimum basilicum L. · Basil

Udo Schäfer

1 record

KLECA22822

Active

Calibrachoa Cerv. · Calibrachoa

Angelo Carrella

1 record

Kolmrefal

Terminated

Hypericum x inodorum Mill. · Tall tutsan

Floribreed V.O.F.

1 record

JACKLIN 501

Terminated

Lolium perenne L. · Perennial ryegrass

J.R. Simplot Company - a Nevada - USA Corporation

1 record

Lausanne

Active

Kalanchoe Adans. · Kalanchoe

Knud Jepsen A/S

1 record

Levap

Active

Arbutus unedo L. · arbutus

François Leverge

1 record

Katana

Active

Yucca gloriosa L. var. recurvifolia (Salisb.) Engelm. x Y. linearifolia Clary

Frédéric Julien

1 record

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