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.

Poulbril

Terminated

Rosa L. · Rose

Poulsen Roser Aps (DK)

DE DK FR IT

6 records

Poulamb

Terminated

Rosa L. · Rose

Poulsen Roser Aps (DK)

DE DK FR IT

6 records

Meisolroz

Protection expired

Rosa L. · Rose

Meilland, Marie-Louise

DE FR NL SE

6 records

Julia

Terminated

Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium

Martin Geibel c/o Elsner pac Jungpflanzen GbR

BE DE DK SE

6 records

Greta

Active

Rosa L. · Rose

Meilland International S.A.

ES FR IT NL

6 records

Gerdo

Protection expired

Rosa L. · Rose

Voorden, D.G.

DK ES FR NL

6 records

Stapisou

Terminated

Dianthus caryophyllus L. · Carnation

van Staaveren B.V.

DE ES NL

6 records

Tanakinom

Active

Rosa L. · Rose

Rosen Tantau KG

DE HU NL

6 records

Tanefle

Active

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

DE FR PL

6 records

Poulrust

Active

Rosa L. · Rose

Poulsen Roser A/S

DK NL PL

6 records

Noafeuer

Application submitted

Rosa L. · Rose

WERNER NOACK

DE IT PL

6 records

Poulor

Active

Rosa L. · Rose

Poulsen Roser A/S

DK NL PL

7 records

Mona Lisa

Protection expired

Lilium L. · Lily

Vletter, Floris|Rijnsburg, Netherlands

BE FR NL

6 records

Ovaro

Protection expired

Chrysanthemum L. · Chrysanthemum

WILLIAM E DUFFETT

DK NL SE

6 records

Macrexy

Protection expired

Rosa L. · Rose

Samuel McGredy

DE DK FR

6 records

Meitulimon

Active

Rosa L. · Rose

SNC Meilland et Cie

ES FR IT

6 records

Meipierar

Active

Rosa L. · Rose

Meilland, Alain A.|Antibes, France

DK FR IT

6 records

Meidarwet

Active

Rosa L. · Rose

MEILLAND STAR ROSE

DE NL PL

8 records

Lindayo

Terminated

Chrysanthemum L. · Chrysanthemum

Vandenberg Cornelis P

DK IT NL

6 records

Korsaku

Active

Rosa L. · Rose

W. KORDES'SOHNE ROSENSCHULEN GMBH & CO KG

DE NL PL

6 records

Meipelta

Active

Rosa L. · Rose

Meilland, Alain A.|Antibes, France

FR IT NL

6 records

Icecrystal

Protection expired

Pelargonium L'Hér. ex Ait. · Geranium

Hofmann Christa

FR NL SI

6 records

Lontarion

Active

Dianthus L. · Carnation

Nicoletta Baratta (IT)

FR HU IT

6 records

Kronos

Terminated

Brassica napus var. napus · Rapeseed

PAULMANN WERNER / FRAUEN MARTIN

DE PL SE

9 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.