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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.

Frejus

Active

Tulipa L. · Tulip

Vof Rotteveel Burgerbrug

NL
1 record

Flirtpel

Withdrawn

Pelargonium graveolens L'Hér. · Rose geranium

SCHUMANN INGEBORG

IT
1 record

Fresco

Withdrawn

Dahlia Cav. · Dahlia

Wielkopolska Hodowla Roślin Ogrodniczych

PL
2 records

GITTI

Terminated

Rhododendron L. · Azalea

HOLZ PETER-HANS

BE
1 record

Gisela

Terminated

Saintpaulia H. Wendl. · African violet

OPTIMARA| Optimara-Erfindergemeinschaft GbR, Gebr. Holtkamp

DE
1 record

Genbur

Terminated

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

Wolf Endisch / Gerd Endisch / Ursula Endisch-Burmeister geb. Endisch

DE
1 record

Gibraltar

Active

Tulipa L. · Tulip

Hybris B.V.

NL
1 record

Forehand

Active

Lilium L. · Lily

Laan Flora Facilities B.V.

NL
1 record

Genaren

Terminated

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

Wolf Endisch / Gerd Endisch / Ursula Endisch-Burmeister geb. Endisch

DE
1 record

Geisha Girl GOF

Terminated

Calendula officinalis L. · Pot marigold

PlantiCo Hodowla i Nasiennictwo Ogrodnicze Golebiew sp. z o.o.

PL
1 record

FIORELLA ROSSO

Terminated

Dianthus caryophyllus L. · Carnation

RICARDO BREA E HIJOS

ES
2 records

Fulltime

Active

Tulipa L. · Tulip

J.A.Borst Bloembollen B.V.

NL
1 record

Filique Arrow

Protection expired

Delphinium L. · Larkspur

Westhoff

NL
1 record

Fuschini

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

BVBA Pieters Joseph and Luc.

PL
1 record

FIFI

Protection expired

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

PETER JACOBSEN

DK
1 record

Finishline

Active

Lilium L. · Lily

Laan Flora Facilities B.V.

NL
1 record

Filutek

Terminated

Callistephus chinensis (L.) Nees · China aster

Krakowska Hodowla i Nasiennictwo Ogrodnicze POLAN sp. z o.o.

PL
1 record

Fuji-no-Taki

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

Information regarding the breeder received in the contribution to CPVO :Katsumata Kazuyoshi

FR
1 record

Fair Price

Active

Tulipa L. · Tulip

Triflor Breeding Rights B.V.

NL
1 record

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