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.

Meibokir

Active

Rosa L. · Rose

ALAIN MEILLAND

2 records

Madrid

Terminated

Hibiscus rosa-sinensis L. · Chinese hibiscus

Coöperatieve Vereniging Werkgroep Hibiscus U.A.

2 records

Minicher

Terminated

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

CHRISTA HOFMANN

2 records

Lovelife

Terminated

Dahlia Cav. · Dahlia

Leonardus J. Berbee

2 records

Laura

Active

Geranium pratense L. · Meadow crane's-bill

Christine Morley

2 records

Melody Lisa

Active

Dahlia Cav. · Dahlia

Verwer-Dahlia's B.V.

2 records

Konahe

Active

Dianthus caryophyllus L. · Carnation

HilverdaKooij B.V

2 records

Meirivoui

Active

Rosa L. · Rose

Alain Antoine Meilland

2 records

Lexativas

Terminated

Rosa L. · Rose

LEVACY LTD

2 records

Meiriansois

Active

Rosa L. · Rose

Meilland Alain A.

2 records

KLEDP24523

Application submitted

Dianthus caryophyllus L. · Carnation

MAIKE BOXRIKER

2 records

KLEDP19289

Terminated

Dianthus caryophyllus L. · Carnation

LENA THIEDE|NILS KLEMM

2 records

KLEDP16188

Active

Dianthus caryophyllus L. · Carnation

Nils Klemm^^^Lena Thiede

2 records

KLEDG20466

Active

Dianthus x allwoodii hort. · Allwood pink

Nils Klemm^^^Lena Thiede

3 records

KLECA14275

Active

Calibrachoa Cerv. · Calibrachoa

NILS KLEMM|ANITA STOEVER

2 records

KRHAISU01

Active

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

2 records

Mars

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Korlipara Harini|Canby, OR, US

2 records

Luna Roja

Active

Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fernald · Rough oxeye

Verschoor Janus

2 records

Korvapoco

Application submitted

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

2 records

Korsupigel

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

2 records

Kerbelil

Active

Primula vulgaris Huds. · Primrose

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

2 records

Korettiflus

Active

Rosa L. · Rose

Tim-Hermann Kordes^^^John Vincent Kordes^^^Wilhelm Kordes

2 records

Lady Ann

Active

Paeonia L. · Peony

Christian Kooiman

2 records

Korcoeinf

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

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.