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.

Dekchironne

Terminated

Chrysanthemum L. · Chrysanthemum

Cornelis W. Dekker

2 records

Dekbretagne Splendid

Terminated

Chrysanthemum L. · Chrysanthemum

Cornelis W. Dekker

2 records

Durango

Active

Dahlia Cav. · Dahlia

Green Works International B.V.

2 records

Dekberet Green

Terminated

Chrysanthemum L. · Chrysanthemum

Cornelis W. Dekker

2 records

ESM G057

Active

Gypsophila L. · Baby's breath

Guerrero Maria Elena

2 records

Duesaoran

Active

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

Tobias Dümmen

2 records

Dehesa De La Villa

Active

Ulmus minor Mill. · Field elm

Dirección General de Desarrollo Rural y Política Forestal, Unidad de Anatomía Fisiología y Genética Forestal

2 records

DUEAND11

Active

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

Tobias Dümmen

2 records

Dapawhi

Terminated

Dahlia Cav. · Dahlia

PanAmerican Seed Europe B.V.

2 records

Dapalipi

Terminated

Dahlia Cav. · Dahlia

PanAmerican Seed Europe B.V.

2 records

Elliflor Pink

Active

Chrysanthemum L. · Chrysanthemum

Floritec Breeding B.V.

2 records

Dapitec

Active

Chrysanthemum L. · Chrysanthemum

Floritec Breeding B.V.

2 records

Cadenza

Active

Tulipa L. · Tulip

Coöperatieve Kwekersvereniging "Arma" U.A.

2 records

Danielle

Active

Kalanchoe Adans. · Kalanchoe

Knud Jepsen

2 records

Dafyrre

Active

Dahlia Cav. · Dahlia

Dalina Genetics A/S

2 records

Double Cadillac

Terminated

Tulipa L. · Tulip

Bollen- en Bloemenkwekerij Visser Oostwoud B.V.

2 records

Double Beauty

Active

Lilium L. · Lily

MAATSCHAP GEBR.T.M. M.T. EN J.C. DE LOOFF

2 records

Don Garcia

Terminated

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Knaap Licenties B.V.

4 records

Bright Eyes

Terminated

Dianthus x allwoodii hort. · Allwood pink

Carolyn Grace Bourne, Carolyn Grace Bourne

2 records

Don Amarillo

Active

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Leonardus J. M. van der Knaap

2 records

Crossfire

Active

Tulipa L. · Tulip

Testcentrum voor Siergewassen B.V.

2 records

Don Feliz

Active

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Timothy J.H. Hoogkamp

2 records

BPH 4

Active

Philadelphus L. · Mock orange

Ulrika Carlson-Nilsson

2 records

DLFSHEI

Terminated

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

2 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.