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.

Ronja

Terminated

Rhododendron simsii Planch. · Indica azalea

JACKST| Bernd Jackst

1 record

Rosenmund

Terminated

Prunus triloba Lindl. · Flowering Almond

MUELLER BRUNO| Bruno Mueller

1 record

ROZAMUNDE

Terminated

Gerbera jamesonii Bolus ex Hook. f. · Barberton daisy

Rozenoord NV (BE)

1 record

Sachsenstern

Protection expired

Rhododendron simsii Planch. · Indica azalea

Reiner Thomas

1 record

Royal Centennial

Active

Tulipa L. · Tulip

Huijg Veredeling B.V.

1 record

Rimini

Active

Freesia Eckl. ex Klatt · Freesia

Penning Breeding B.V.

1 record

Rokoko

Terminated

Rhododendron simsii Planch. · Indica azalea

HOLZ| Hans-Peter Holz

1 record

Rosora

Active

Lilium L. · Lily

World Breeding B.V

1 record

Rodolfo

Withdrawn

Dianthus L. · Carnation

NOBBIO GIACOMO

1 record

Rima Abed

Withdrawn

Hordeum vulgare L. · Barley

Abed Plant Breeding Station

2 records

Roadrunner

Active

Tulipa L. · Tulip

G. Buis Bloembollen B.V.

1 record

Riga

Active

Freesia Eckl. ex Klatt · Freesia

Penning Breeding B.V.

1 record

Rockabilly

Active

Tulipa L. · Tulip

Huijg Breezand B.V.

1 record

REUHAM

Active

Rosa L. · Rose

Gaec Reuter Freres (FR)

1 record

Romeo

Terminated

Callistephus chinensis (L.) Nees · China aster

Przedsiebiorstwo Nasiennictwa Ogrodniczego i Szkolkarstwa Spolka Akcyjna w upadlosci likwidacyjnej

1 record

Renata

Terminated

Saintpaulia H. Wendl. · African violet

FISCHER ARNOLD| Arnold Fischer

1 record

RICHZONE

Terminated

Rosa L. · Rose

Raymond Richardier (FR)

1 record

REFOUR

Terminated

Chrysanthemum indicum L. · Indian chrysanthemum

Revecu BV (NL)

1 record

Red Sun

Active

Calluna vulgaris (L.) Hull · Common heather

Hans-Peter Holz

1 record

Red Chato

Active

Tulipa L. · Tulip

Savro B.V.

1 record

Roadstar

Active

Tulipa L. · Tulip

Q.J. Vink & Zn. B.V.

1 record

Regents Park

Active

Lilium L. · Lily

De Jong Beheer B.V.

1 record

Red Wealthy

Terminated

Malus domestica (Suckow) Borkh. · Apple

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

1 record

Red Velvet

Active

Tulipa L. · Tulip

Marax Tulips V.O.F.

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.