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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.

Flosplight

Terminated

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

2 records

Demeter

Active

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Topcolor Breeding V.O.F.

2 records

Flamingo

Active

Ribes uva-crispa L. · Gooseberry

SOROKOPUDOVA OL'GA ANATOL'EVNA / SOROKOPUDOV VLADIMIR NIKOLAEVICh / SOLOV'EVA ANNA EVGEN'EVNA

2 records

Fuga

Application submitted

Begonia x hiemalis Fotsch · Elatior Begonia

Smaal Andre

2 records

Delimiquel

Active

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

2 records

Dancing Snow

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Toyokazu Ichie

2 records

Delicros

Active

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

2 records

Fisbilly

Terminated

Pelargonium L'Hér. ex Ait. · Geranium

Angelika Utecht

2 records

Firefly

Active

Silene dioica (L.) Clairv. · Red campion

GWENDYTH BLAKE

2 records

FRCK 003 S 123

Application submitted

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Hiroyuki Mekada, Hiroko Inamura, Tetsuya Kato, Yuka Shimizu

4 records

Ficalanhurley

Terminated

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Ike Vlielander

2 records

Curiosity

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

FLOCRYSDEL

Active

Delphinium L. · Larkspur

Anthony Paul Coakley

2 records

CSGZ0005

Active

Coreopsis grandiflora Hogg ex Sweet · Large-flowered tickseed

Syngenta Participations AG

2 records

DCOREO16

Active

Coreopsis grandiflora Hogg ex Sweet · Large-flowered tickseed

Gavriel Danziger

2 records

DCOPDBINDG

Active

Sutera cordata Thunb. Kuntze · Bacopa

Gavriel Danziger

2 records

Crosoupent

Active

Rosa L. · Rose

Jacques Ranchon

2 records

Dreamer

Active

Tulipa L. · Tulip

Testcentrum voor Siergewassen B.V.

2 records

Dapaor

Terminated

Dahlia Cav. · Dahlia

PanAmerican Seed Europe B.V.

2 records

Doudeli

Active

Clematis montana Buch.-Ham. ex DC. · Anemone clematis

Robinson Charles Mitchell , Lorna Mildred Mitchell

2 records

Exrosa White

Terminated

Eustoma exaltatum (L.) Salisb. ex G. Don subsp. russellianum (Hook.) Kartesz · Lisianthus

Sakata Seed Corporation (SCC)

2 records

Fistador

Protection expired

Pelargonium L'Hér. ex Ait. · Geranium

Angelika Utecht

2 records

Coral Reef

Active

Dianthus x allwoodii hort. · Allwood pink

Carolyn Grace Bourne

2 records

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