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.

POULesta

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

6 records

Poulac016

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

6 records

Nirpbijere

Active

Rosa L. · Rose

HANS JURGEN EVERS (T)

6 records

Meizuleros

Active

Rosa L. · Rose

Meilland International S.A.

6 records

Meivility

Active

Rosa L. · Rose

Meilland Alain A.|Antibes, FR

6 records

Moon Light

Active

Delphinium L. · Larkspur

Coakley Tony|Blantyre, Glasgow G72 9BB, GB

6 records

Meiswetdom

Active

Rosa L. · Rose

Meilland International

6 records

Meibivers

Active

Rosa L. · Rose

MEILLAND ALAIN ANTOINE

6 records

KORgeleflo

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

6 records

Lexteews

Active

Rosa L. · Rose

Evalesco B.V.

6 records

KORjupvio

Active

Rosa L. · Rose

Wilhelm-Alexander Kordes, Tim-Hermann Kordes, John-Vincent Kordes

6 records

Harwelcome

Active

Rosa L. · Rose

R HARKNESS and CO LTD

6 records

Delibaltica

Active

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

6 records

Boriasko Dark

Active

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

6 records

Ausway

Active

Rosa L. · Rose

David J.C.Austin

6 records

Betulia Candy

Active

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

6 records

Arctic Queen

Active

Chrysanthemum L. · Chrysanthemum

JOS KESTER

6 records

auslofty

Active

Rosa L. · Rose

David J.C.Austin

7 records

LG31332

Active

Zea mays L. · Maize

Marcelo Queijo

BG IT SK UA

6 records

Romano

Application submitted

Lilium L. · Lily

VLETTER FLORIS| Floris Vletter

BE DE FR NL PL

6 records

Poulaps

Active

Rosa L. · Rose

Poulsen Roser Aps (DK)

DK FR IT NL PL

5 records

Tanziewsim

Protection expired

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

DE DK NL PL

5 records

Tanmurse

Active

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

DE IT NL PL

5 records

Tango

Terminated

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

SCHUMANN INGEBORG

BE DE DK SE

5 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.