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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.

Classic Price

Active

Tulipa L. · Tulip

Triflor Breeding Rights B.V.

NL
1 record

Camina

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

PARATY B.V.B.A

PL
1 record

Cognac

Active

Tulipa L. · Tulip

Remarkable C.V.

NL
1 record

Cipro

Active

Dianthus L. · Carnation

SAPIA FLAVIO COSTANZO

IT
1 record

Cammeo

Withdrawn

Rosa L. · Rose

BREA LIONELLO

IT
1 record

Chornomor

Terminated

Paeonia L. · Peony

Horobets Vasyl Fedorovych

UA
2 records

CHINATOWN

Protection expired

Rosa L. · Rose

NIELS DINES POULSEN

DK
1 record

Caracas

Active

Tulipa L. · Tulip

Fa. A. en L. Duin

NL
1 record

Capulco White

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

BVBA Pieters Joseph and Luc.

PL
1 record

Charly

Terminated

Rhododendron simsii Planch. · Indica azalea

GLASER| Karl Glaser

DE
1 record

Candy Time

Active

Tulipa L. · Tulip

W. van Lierop & Zonen B.V.

NL
1 record

Ceveca

Terminated

Begonia x hiemalis Fotsch · Elatior Begonia

NILSSON CHRISTER| Christer und Peter Nilsson

DE
1 record

Canyon

Active

Tulipa L. · Tulip

G. Buis Bloembollen B.V.

NL
1 record

BRONIA

Terminated

Chrysanthemum L. · Chrysanthemum

PIETERS LUC

BE
1 record

Byron Bay

Active

Tulipa L. · Tulip

Vertuco B.V.

NL
1 record

Bydgoszczanka

Active

Chrysanthemum x morifolium Ramat. · Florist's daisy

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich

PL
1 record

BOXARI

Terminated

Chrysanthemum indicum L. · Indian chrysanthemum

Bernard Guy & Fils Sarl (FR)

FR
1 record

Callahan

Active

Tulipa L. · Tulip

Westend Bulb B.V.

NL
1 record

Caddy

Active

Lilium L. · Lily

Laan Flora Facilities B.V.

NL
1 record

Carisma

Terminated

Rosa L. · Rose

Carmel

NL
1 record

Brooklyn

Active

Tulipa L. · Tulip

Vertuco B.V.

NL
1 record

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