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.

White Sarah Bernardt

Terminated

Paeonia lactiflora Pall. · Chinese peony

De Wilgenhoek Beheer B.V.

1 record

White Fairy

Withdrawn

Erica L. · Heather

Boomkwekerij Hoekert B.V.

1 record

VOLDAH5612

Withdrawn

Dahlia Cav. · Dahlia

Volmary Ltd

1 record

Westana

Terminated

Dianthus caryophyllus L. · Carnation

West Select B.V.

1 record

Violin Saron

Terminated

Rosa L. · Rose

Saron Breeding B.V.

1 record

Victoria Sponge

Application submitted

Geum L. · Avens

Gerardus A.P. Lommerse

1 record

ZO23020

Application submitted

Clematis L. · Clematis

J.VAN ZOEST BEHEER B.V.

1 record

Veronica

Active

Begonia x hiemalis Fotsch · Elatior Begonia

Begonia Breeders Association B.V.

1 record

Wradish

Active

Rosa L. · Rose

Marchenrose Co. Ltd.

1 record

WP10 ELE04

Terminated

Dianthus x allwoodii hort. · Allwood pink

Carolyn Grace Bourne

1 record

Vedi Napoli

Terminated

Tulipa L. · Tulip

Gebr. N. & C.A. Ruiter

1 record

Wishful Thinking

Terminated

Delphinium L. · Larkspur

Benjamin Roelof van Tol

1 record

Victoria Falls

Terminated

Begonia L. · Begonia

Florema Young Plants B.V.

1 record

TOSTD0451

Terminated

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

Floha V.O.F

1 record

TOSTD0145

Active

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

Floha V.O.F

1 record

Verona

Withdrawn

Delphinium elatum L. · Alpine delphinium

Peter Houben

1 record

Veracruz

Withdrawn

Dahlia Cav. · Dahlia

Green Works International B.V.

1 record

Zava Saron

Withdrawn

Rosa L. · Rose

Saron Breeding B.V.

1 record

TOLKOO

Withdrawn

Clematis patens C. Morren & Decne.

Kinshichi Isogai

1 record

TNLEULP

Active

Leucanthemum x superbum (Bergmans ex J. W. Ingram) D. H. Kent · Shasta daisy

HARINI KORLIPARA

1 record

UTP Profesor Jerzy

Active

Chrysanthemum L. · Chrysanthemum

Bydgoszcz University of Science and Technology

1 record

ZO24010

Application submitted

Clematis L. · Clematis

J.VAN ZOEST BEHEER B.V.

1 record

Tiberius

Application submitted

Paeonia L. · Peony

Peony Shop Holland V.O.F.

1 record

Yellow Water Lily

Terminated

Paeonia L. · Peony

ANDERSON ROGER F.

1 record

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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.