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.

PR91B92

Active

Glycine max (L.) Merr. · Soybean

PIONEER HI-BRED INT

4 records

Poultrav

Terminated

Rosa L. · Rose

Poulsen Roser A/S

3 records

Poulsint

Terminated

Rosa L. · Rose

Poulsen Roser A/S

3 records

Poulerry

Active

Rosa L. · Rose

Poulsen Roser A/S

3 records

Poisdel

Active

Prunus avium (L.) L. · Sweet cherry

Societe Nouvelle des Pepinieres & Roseraies Georges DELBARD (FR)

5 records

PRAELUDIUM

Protection expired

Pelargonium L'Hér. ex Ait. · Geranium

Gunter DUMMEN (DE)

3 records

Potaissa TD

Active

Glycine max (L.) Merr. · Soybean

REZI RALUCAURDA ANCA CAMELIA

4 records

POULtory

Terminated

Rosa L. · Rose

POULSEN ROSER A/S

3 records

Poulkrid

Terminated

Rosa L. · Rose

Poulsen Roser A/S

3 records

Pink Beauty

Active

Dasiphora fruticosa (L.) Rydb. subsp. fruticosa · Shrubby cinquefoil

University of Manitoba (CA)

3 records

Pitar

Active

Triticum aestivum L. · Bread wheat

SAULESCU NICOLAEITTU GHEORGHEMUSTATEA POMPILIUITTU MARIANAGIURA AUREL

4 records

Pink Ice

Active

Impatiens L. · Balsam

MR.D.COLE

3 records

PARSIFAL

Active

Dianthus L. · Carnation

Nobbio G.

3 records

Peach Ice

Protection expired

Impatiens L. · Balsam

MR.D.COLE

3 records

Pacblusy

Active

Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium

Hofmann Christa

3 records

Ostalett

Active

Rhododendron simsii Planch. · Indica azalea

Stahnke, Otto|Bromer Strasse 104, 38524 Sassenburg-Grussendorf, Federal Republic of Germany / Dettmer, Peter|Bromer Strasse 104, 38524 Sassenburg-Grussendorf, Federal Republic of Germany / Dettmer, Eleonore|Bromer Strasse 104, 38524 Sassenburg-Grussendo

3 records

Palais

Protection expired

Pelargonium L'Hér. ex Ait. · Geranium

VEB Saat und Pflanzgut (DE)

3 records

ORACHARPAM

Active

Rosa L. · Rose

ROSERAIES GAUJARD

3 records

Noaley

Active

Rosa L. · Rose

Reinhard Noack

3 records

Oakland

Active

Lactuca sativa L. · Lettuce

BEJO ZADEN

7 records

NEX 150

Terminated

Brassica napus var. napus · Rapeseed

3 records

Neshka

Protection expired

Dianthus caryophyllus L. · Carnation

Dr Alexander Boykov

3 records

NOS Upstairs

Active

Hordeum vulgare L. · Barley

Nordic Seed A/S

4 records

Mv Szigma

Terminated

Triticum aestivum L. · Bread wheat

Balla Laszlo / Bedoe Zoltan / Lang Laszlo / Szunics Laszlo / Szunics Laszlone / Karsai Ildiko

4 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.