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.

Dapavio

Protection expired

Dahlia Cav. · Dahlia

PanAmerican Seed Europe B.V.

3 records

Delstrimen

Active

Rosa L. · Rose

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

3 records

Deauville

Active

Rubus idaeus L. · Red raspberry

Marionnet SCEA (FR)

4 records

Daparos

Protection expired

Dahlia Cav. · Dahlia

PanAmerican Seed Europe B.V.

3 records

Dangypfirm

Active

Gypsophila paniculata L. · Baby's-breath

danziger gabriel

3 records

Delarosa

Active

Rosa L. · Rose

Pepinieres Delaunay SAS (FR)

3 records

Claro de Luna

Active

Vicia faba L. var. major Harz · Broad bean

SEMILLAS FITO, S.A.

4 records

Corany

Active

Lactuca sativa L. · Lettuce

Enza Zaden Beheer B.V.

5 records

Concorde

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

3 records

Comsan

Active

Rosa L. · Rose

MEILLAND STAR ROSE

4 records

Cfpc Lahana

Active

Dianthus caryophyllus L. · Carnation

OSCAR HASEGAWA

3 records

Chantal

Active

Dianthus L. · Carnation

Giorgio, Antonio Di|San Remo, Italy / Giorgio, Renato Di|San Remo, Italy

3 records

Chewpope

Active

Rosa L. · Rose

WARNERS ROSES

3 records

Chaburga

Active

Chrysanthemum L. · Chrysanthemum

Challet, Jean Pierre|Nuaille, France

3 records

Clips Light Lav

Active

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

Hanes Mitchell Eugene|Morgan Hill, CA

3 records

Celebration

Protection expired

Chrysanthemum L. · Chrysanthemum

WALTER H. JESSEL, JR. & WILLIAM E. DUFFETT

3 records

Carsoof

Active

Rosa L. · Rose

Carmi, Carmel|Moshav Hayogev, Israel

3 records

Carrera Reagan

Terminated

Chrysanthemum L. · Chrysanthemum

REVECU II B.V.

3 records

Clip Velred

Active

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

Mitchell Eugene Hanes

3 records

Chewarvel

Protection expired

Rosa L. · Rose

WARNERS ROSES

3 records

Bonito

Active

Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium

van Holsteijn, C.J.C.

3 records

Burgundy Rose

Terminated

Impatiens walleriana Hook. f. · Busy Lizzie

Ellen Leue

3 records

Blue Heaven

Active

Delphinium L. · Larkspur

F.G.A. Leliveld, G.T. Weijden

3 records

BIA1333

Active

Zea mays L. · Maize

Syngenta Participations AG

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.