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.

KLEDG20468

Active

Dianthus x allwoodii hort. · Allwood pink

Nils Klemm^^^Lena Thiede

2 records

KORPOT019

Terminated

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

1 record

Klevana

Terminated

Dianthus L. · Carnation

Siegfried Klemm

1 record

Kleremo

Terminated

Dianthus L. · Carnation

Klemm+Sohn GmbH &Co.KG

1 record

Korfruisala

Active

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

Jenny

Terminated

Dahlia Cav. · Dahlia

PanAmerican Seed Europe B.V.

1 record

KORCHARBLU

Active

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

Lemon Dream

Terminated

Paeonia L. · Peony

ANDERSON ROGER F.

1 record

KLEN04060

Terminated

Dianthus caryophyllus L. · Carnation

Per Klemm

1 record

Koralaflor

Application submitted

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

KLEDS13A01

Terminated

Dianthus caryophyllus L. · Carnation

La Villetta S.R.L.

1 record

Kiko

Terminated

Chrysanthemum L. · Chrysanthemum

Chrysanthemum Breeders Association Research B.V.

1 record

Jasoda White

Terminated

Chrysanthemum L. · Chrysanthemum

PARATY B.V.B.A

1 record

Kereliza

Terminated

Petunia x atkinsiana D. Don · Garden petunia

Priscilla Grace Kerley, David William Kerley, Timothy Edward Kerley

1 record

Kerbeldawn

Terminated

Primula vulgaris Huds. · Primrose

Priscilla Grace Kerley^^^Timothy Edward Kerley^^^Sarah Elisabeth Kerley^^^David William Kerley

1 record

KRILOYO01

Active

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

1 record

Korsosoma

Active

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

KROUTDS01

Active

Begonia x tuberhybrida Voss · Tuberous begonia

LUBBERTUS H.KOPPE

1 record

Jorca Pink

Terminated

Chrysanthemum L. · Chrysanthemum

PARATY B.V.B.A

1 record

KERREV

Terminated

Petunia Juss. · Petunia

David William Kerley, Priscilla Grace Kerley

1 record

HORE9306

Application submitted

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Lendert De Vos

1 record

Korphieso

Application submitted

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

HOLKAORI

Active

Dianthus superbus L. · Large pink

Kazuyuki Shishido

1 record

Holbein

Terminated

Chrysanthemum L. · Chrysanthemum

PETER WAIN

1 record

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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.