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.

Beleno

Active

Glycine max (L.) Merr. · Soybean

Marco Signor

4 records

Azara

Active

Hordeum vulgare L. · Barley

SEMILLAS BATLLE, S.A.

5 records

Austris

Active

Hordeum vulgare L. · Barley

S.Kalinina, D.Grauda, I.Rasals, M.Bleidere, I.Grunte, S.Malecka

4 records

Anubis

Active

Pisum sativum L. · Pea

Limagrain UK

5 records

Aristos

Active

Hordeum vulgare L. · Barley

Poljoprivredni Institut Osijek, HR

4 records

HMv 5405

Terminated

Zea mays L. · Maize

Szundy Tamas, Akos Orosz, Lajos Kizmus, Janos Pinter, Geza Hadi, Csaba L. Marton,

HU UA

3 records

PX 20

Terminated

Zea mays L. subsp. mays (Maize Group) · Maize

NORTHRUP KING

ES HR

2 records

DKC5911

Active

Zea mays L. · Maize

MONSANTO TECHNOLOGY

3 records

Westdiamond

Terminated

Dianthus caryophyllus L. · Carnation

West Select B.V.

ES NL

2 records

Wesbag

Protection expired

Dianthus caryophyllus L. · Carnation

WEST SELECT| West Select B.V.

DE NL

2 records

Uhlrutida

Active

Rosa L. · Rose

INAKTIV Jürgen Uhl (Walter Uhl Baumschulen)

DE NL

2 records

TAMIRA

Terminated

Rhododendron L. · Azalea

KARL GLASER

BE DK

2 records

Veria Dark

Protection expired

Chrysanthemum L. · Chrysanthemum

Pieters Dirk

BE NL

2 records

Taneidol

Active

Rosa L. · Rose

Hans-Juergen Evers

DE NL

2 records

Tiguan

Terminated

Triticum aestivum L. subsp. aestivum · Bread wheat

NORDSAAT Agrargesellschaft mit beschraenkter Haftung

CZ DE

2 records

Staflam

Terminated

Dianthus caryophyllus L. · Carnation

ANDEL| Jacob van Andel

DE NL

2 records

TANKLESANT

Protection expired

Rosa L. · Rose

Rosen Tantau KG

DK FR

2 records

Tanbak

Active

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

DE PL

2 records

Sparta

Terminated

Dianthus caryophyllus L. · Carnation

BARBERET & BLANC, S.A.

ES NL

2 records

Sunny

Protection expired

Kalanchoe Adans. · Kalanchoe

A/S KNUD JEPSEN

DK NL

2 records

Sofia

Terminated

Dianthus L. · Carnation

Dr. Giacomo Nobbio (IT)

FR IT

2 records

Red Rox

Terminated

Dianthus L. · Carnation

Donato DI GIORGIO (IT)

FR IT

2 records

Rosita

Terminated

Pelargonium grandiflorum (Andrews) Willd. · Regal pelargonium

HARDY BJELDBAK

DE DK

2 records

Rosade

Protection expired

Begonia x hiemalis Fotsch · Elatior Begonia

Hans Joachim Rohde (DE)

DE FR

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.