Variety traits

Double flowering / Reversion

Reversion virus

In crop production, the term refers to two distinct concepts: a decorative trait characterized by an increased number of petals in flowers, or a dangerous viral disease of blackcurrants that causes sterility.

Mentioned in descriptions 16 231 varieties reference book.

In ornamental horticulture, double flowering is a varietal characteristic expressed by an increased number of petals in a flower to enhance aesthetic appeal. In the case of blackcurrants, double flowering, or reversion, manifests as a viral disease in which flowers are deformed into purple outgrowths, leaves lose their shape, and the plant becomes sterile.

This trait is assessed as a qualitative phenotypic indicator. In ornamental crops, double flowering is recorded during variety trials either visually or by using scoring systems for ornamental quality. Regarding currants, double flowering is considered a critical symptom, the presence of which requires phytosanitary culling of infected specimens.

Resistance of a variety to pathological reversion is determined by the genetic ability to withstand the virus and its vector, the currant bud mite. When choosing planting material for a garden, preference should be given to varieties with proven genetic resistance, as there are no numerical units of measurement for this trait.

Sources6

Breakdown by crop

Rose Double-flowering 1 377 Tulip double flowering 375 Chrysanthemum double-flowering 344 Carnation Double Flowering 336 Double-flowered Lily 164 Carnation double-floweredness 163 Double-flowering — Pelargonium zonale 162 Gerbera double-flowering 142 Dahlia double-flowering 133 Double-flowering in Begonia elatior 90 Double-flowering in Hydrangea macrophylla 88 Double-flowering in Kalanchoe blossfeldiana 77 Pelargonium double flowering 73 Hippeastrum Double-flowering 68 Double-flowering — Pelargonium peltatum 64 Double-flowering in Garden Chrysanthemum 60 Clematis double flowering 59 Azalea double-flowering 56 Double flowers in Impatiens walleriana 54 Freesia double flowers 48 Kalanchoe double flowering 41 Rhododendron doubleness 38 Double-flowering — Tuberous Begonia 38 Double-flowering — Chrysanthemum indicum 32

Found in these crops

Rose 1 840 Tulip 404 Chrysanthemum 348 Carnation 347 Carnation 165 Horseshoe pelargonium 161 Lily 148 Dahlia 141 Gerbera 139 Almond 111 Bigleaf hydrangea 98 Elatior Begonia 88

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.

Osiana

Active

Rosa L. · Rose

Rosen Tantau KG

DE ES FR IT NL

14 records

Meigafor

Active

Rosa L. · Rose

SNC Meilland et Cie

DE ES FR IT NL

15 records

Scholtec

Active

Rosa L. · Rose

Schreurs, P.

16 records

Poulfect

Application submitted

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FI FR IT NL +2

13 records

Korpinka

Active

Rosa L. · Rose

Wilhelm Kordes / Tim-Hermann Kordes / Margarita Kordes in Fa. W. Kordes' Söhne Rosenschulen GmbH & Co KG

BE DE DK FR HU NL +2

13 records

Meiflopan

Active

Rosa L. · Rose

SNC Meilland et Cie

BE DE DK ES FR IT +2

13 records

Poulhappy

Terminated

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FI FR NL PL +1

13 records

Poulsun

Protection expired

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FI FR NL PL +1

14 records

Poultin

Protection expired

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FI FR IT NL +1

14 records

Tanalephar

Active

Rosa L. · Rose

ROSEN-TANTAU MATHIAS-TANT

DE ES FI FR NL PL

13 records

Delstrobla

Active

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

BE DE ES FR IT NL

13 records

Meivamo

Active

Rosa L. · Rose

SNC Meilland et Cie

DE ES FR IT NL

14 records

Pekcoucan

Active

Rosa L. · Rose

Pekmez, Paul|La Petite Pierre, 67290 Wingen-sur-Moder, France

DE FR IT NL

15 records

Selaurum

Active

Rosa L. · Rose

Terra Nigra Holding b.v

HU PL UA

14 records

Kornalist

Active

Rosa L. · Rose

Wilhem Kordes

DE PL

13 records

Korturek

Active

Rosa L. · Rose

Wilhelm Kordes, W. Kordes' Sohne Rosenschulen GmbH & Co KG

HU PL

14 records

Meirutral

Active

Rosa L. · Rose

SNC Meilland et Cie

BE DE DK ES FR IT +1

12 records

POULrouge

Protection expired

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FI FR NL PL +1

12 records

Poulprima

Terminated

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FI FR NL PL +1

12 records

Korlingo

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

BE DE DK ES FR IT +1

12 records

Poulchris

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FR IT NL PL

12 records

POULrek

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FR IT NL PL

12 records

Poulthe

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FR IT NL PL

12 records

Tanselbon

Active

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

DE FR IT NL PL

13 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.