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.

Bozdragfra

Active

Rosa L. · Rose

Pheno Geno Rose D.O.O.

2 records

Ibis

Active

Chrysanthemum L. · Chrysanthemum

FGB B.V.

2 records

18CAN62

Active

Delosperma cooperi (Hook. f.) L. Bolus · Trailing ice plant

Koichiro Nishikawa

2 records

Aurelique

Active

Rhododendron simsii Planch. · Indica azalea

Stefan Kanders

2 records

Bozhrug755

Active

Rosa L. · Rose

Pheno Geno Rose D.O.O.

2 records

Don Dione

Active

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Timothy J.H. Hoogkamp

2 records

Dardoran

Terminated

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

2 records

Bozkonsfre

Active

Rosa L. · Rose

Pheno Geno Rose D.O.O.

2 records

Alonso

Active

Dianthus caryophyllus L. · Carnation

Bio Decor

2 records

Yomarilyn

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

Yoder Brothers Inc

2 records

Yoko Ono

Terminated

Chrysanthemum L. · Chrysanthemum

Dekker Breeding B.V

2 records

Zahar SP

Active

Brassica oleracea L. (White Cabbage Group) · White cabbage

Institute of Field and Vegetable Crops Novi Sad

2 records

Yellow Boris Becker

Terminated

Chrysanthemum L. · Chrysanthemum

LYRAFLOR HANDELSKWEKERIJ B.V.

2 records

Yoauburn

Active

Chrysanthemum x morifolium Ramat. · Florist's daisy

Yoder Brothers Inc

2 records

Yellow Beauty

Terminated

Calluna vulgaris (L.) Hull · Common heather

Franz Maassen, GERD CANDERS

2 records

Visione

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

WEZEIP

Terminated

Rosa L. · Rose

WEEKS OL (US)

2 records

WEKlezpat

Active

Rosa L. · Rose

Weeks Roses Inc (US)

2 records

WEKgojolo

Active

Rosa L. · Rose

Weeks Roses Inc (US)

2 records

Wonder Star

Protection expired

Euphorbia pulcherrima Willd. ex Klotzsch · Poinsettia

Hrebeniuk, Alexander|R.D. 1, Box 118, Sugar Run, PA 18846

2 records

Veria Dark

Protection expired

Chrysanthemum x morifolium Ramat. · Florist's daisy

Dirk Pieters

2 records

Weksudaspane

Active

Rosa L. · Rose

Weeks Roses

2 records

WEKisosblip

Active

Rosa L. · Rose

Weeks Roses Inc (US)

2 records

Vanessa

Active

Dianthus L. · Carnation

Lab. De Phys. Veget., Barberet Et Ducloux Et Cie

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.