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.

Prebian

Active

Rosa L. · Rose

Theo Adrianus Segers

DE IT NL PL

12 records

Meidalnu

Active

Rosa L. · Rose

SNC Meilland et Cie

DE ES FR NL

12 records

Meiyacom

Active

Rosa L. · Rose

Meilland, Alain A.|Antibes, France

FR IT NL

13 records

Delstriro

Active

Rosa L. · Rose

Société Nouvelle Pépinières et Roseraies Georges Delbard S.A.S.

14 records

Ausimmon

Active

Rosa L. · Rose

HANS JURGEN EVERS (T)

12 records

Tanledolg

Application submitted

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

AT DE DK FR IT NL +1

11 records

Meikruza

Active

Rosa L. · Rose

SNC Meilland et Cie

DE DK ES FR IT NL +1

11 records

Poulskov

Active

Rosa L. · Rose

Poulsen Roser ApS

DE DK FR IT NL PL +1

12 records

Tanmirsch

Active

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

AT DE FR IT NL PL

11 records

Poulavon

Terminated

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

DE DK FI NL PL SE

11 records

Meibonrib

Active

Rosa L. · Rose

Meilland, Alain A.|Antibes, France

DE DK FR IT NL PL

12 records

Ruilav

Active

Rosa L. · Rose

Pouw, A.A.|De Kwakel, Netherlands

12 records

Ruiwitun

Active

Rosa L. · Rose

Pouw, A.A.|De Kwakel, Netherlands

11 records

Meivanthou

Active

Rosa L. · Rose

Meilland Alain A.

12 records

Meilambra

Active

Rosa L. · Rose

Meilland International S.A.

11 records

Meiyolki

Active

Rosa L. · Rose

Meilland International S.A.

12 records

Ausboxer

Active

Rosa L. · Rose

DAVID JC AUSTIN

12 records

auschris

Active

Rosa L. · Rose

DAVID JC AUSTIN

12 records

Meiviolin

Active

Rosa L. · Rose

SNC Meilland et Cie

BE DE DK ES FR IT +1

10 records

Poulman

Protection expired

Rosa L. · Rose

Poulsen Roser Aps (DK)

BE DE DK ES FR PL +1

11 records

Poulcov

Active

Rosa L. · Rose

Poulsen Roser Aps (DK)

DE DK FR IE IT NL +1

11 records

Melody

Active

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

Hofmann Christa

BE CZ DE DK HU PL +1

10 records

Moryelrug

Active

Rosa L. · Rose

RALPH MOORE, SEQUOIA NURSERY

BE DE DK FR IT NL +1

10 records

Keitoli

Active

Rosa L. · Rose

Suzuki, Seizo|Tokyo, Japan

DE DK ES FR IT NL +1

10 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.