Variety traits

Winter hardiness

Winter hardiness is a complex indicator of a variety's ability to remain viable throughout the winter and early spring periods, including resistance to frost and other environmental stress factors.

Mentioned in descriptions 27 261 varieties reference book.

Winter hardiness is a complex plant characteristic that includes resistance to freezing, smothering, waterlogging, frost heaving, and winter desiccation. Unlike frost resistance, which is limited to tolerance of low temperatures, winter hardiness takes into account the entire spectrum of adverse effects that lead to plant death or damage during the cold period.

The winter hardiness of a variety is evaluated using methods of field assessment of crop conditions after winter, employing scoring scales, as well as laboratory studies. The latter include direct freezing of plant monoliths, biochemical analyses of sugar accumulation, verification of the viability of the tillering node, and the use of genetic markers to determine resistance.

The level of winter hardiness depends on the genetic potential of the variety, the plant's ability to harden, agronomic cultivation practices, and the microclimate characteristics of a specific site. When choosing a variety, one should focus on regionalized forms, bearing in mind that the resistance indicator is relative and requires comparison with local standards and growing conditions.

Sources10

Breakdown by crop

Winter Hardiness of Roses 555 Winter hardiness of common wheat 220 Winter hardiness of apple trees 188 Winter Hardiness — Hydrangea macrophylla 187 Pear Winter Hardiness 123 Winter hardiness — perennial ryegrass 120 Winter Hardiness of Lily 91 Winter hardiness of winter rapeseed 81 Peach winter hardiness 71 Plum Winter Hardiness 65 Winter Hardiness of Clematis 61 Grapevine Winter Hardiness 56 Winter hardiness of winter barley 56 Winter hardiness — garden strawberry 52 Winter hardiness of sweet cherry 48 Tulip winter hardiness 42 Heuchera winter hardiness 40 Winter Hardiness of Alfalfa 39 Chrysanthemum winter hardiness 39 Winter hardiness of triticale 36 Winter Hardiness of Apple 36 Winter hardiness of Hydrangea serrata 36 Grapevine Winter Hardiness 35 Winter hardiness of apricot 35

Found in these crops

Rose 1 062 Apple 843 Bread wheat 657 Lily 410 European pear 348 Bigleaf hydrangea 315 Peach 264 Rapeseed 258 European plum 245 Grapevine 229 Perennial ryegrass 224 Sweet cherry 223

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.

Rainier

Active

Medicago sativa L. · Alfalfa

NOVARTIS SEEDS

4 records

Ramars

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Rampp

3 records

Rescator

Active

Brassica napus var. napus · Rapeseed

SELGEN A.S

5 records

Red Beauty

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :HBA B.V.

3 records

Rea

Active

Vicia villosa Roth · Hairy vetch

Poznanska Hodowla Roslin Sp. z o.o

3 records

Pyroplus

Active

Pyrus L. · Pear

JACOB HELMUT DR.

4 records

PX147

Active

Brassica napus var. napus · Rapeseed

PIONEER OVERSEAS CORPORATION

3 records

Red Planet

Active

Photinia Lindl. · Christmas Berry

WIM MOLS B.V.

4 records

Purple Dream

Active

Clematis L. · Clematis

Szczepan Marczyński

3 records

PS Karkulka

Active

Triticum aestivum L. · Bread wheat

Národné Polnohospodárske a Potravinárske Centrum (NPPC)

5 records

PS Dobromila

Active

Triticum aestivum L. · Bread wheat

Národné Polnohospodárske a Potravinárske Centrum (NPPC)

5 records

Redfield

Active

Malus domestica (Suckow) Borkh. · Apple

TGL Field & Son (NZ)

4 records

Prior

Protection expired

x Festulolium Aschers. et Graebn. · Festulolium

ABERYSTWYTH UNIVERSITY

3 records

Pr59n59

Active

Medicago sativa L. · Alfalfa

PIONEER HI-BRED INTERNATIONAL

5 records

Probat

Terminated

Triticum aestivum L. · Bread wheat

SEJET PLANTEFORÆDLING

4 records

Prevert

Terminated

Lolium perenne L. · Perennial ryegrass

GIE RECHERCHE VERNEUIL SEMUNION

3 records

Puga

Terminated

x Festulolium Aschers. et Graebn. · Festulolium

Lietuvos agrarinių ir miškų mokslų centro filialas Žemdirbystės institutas

3 records

Poullug

Active

Rosa L. · Rose

Poulsen Roser A/S

3 records

Poulasor

Application submitted

Rosa L. · Rose

Poulsen Roser A/S

3 records

Pleven 6

Active

Medicago sativa L. · Alfalfa

Z. Angelov, A. Ibraimov

4 records

Poulkrid

Terminated

Rosa L. · Rose

Poulsen Roser A/S

3 records

Pompilia

Active

Medicago sativa L. · Alfalfa

SCHITEA MARIAMARTURA TEODORDRAGAN LENUTAPETCU ELENA

4 records

Poliai

Active

Trifolium hybridum L. · Alsike clover

Lietuvos agrarinių ir miškų mokslų centras

4 records

Pink Pixie

Protection expired

Lilium L. · Lily

McRae, Edward A|Boring, OR

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.