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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.

Meikerira

Active

Rosa L. · Rose

Alain Antoine Meilland

2 records

Minfren

Active

Hibiscus syriacus L. · Rose of Sharon

Hortival Diffusion S.A.S.

2 records

Meifranjin

Application submitted

Rosa L. · Rose

Meilland International

2 records

MINCHA01

Active

Chaenomeles speciosa (Sweet) Nakai · Chinese-quince

Hortival Diffusion S.A.S.

2 records

PacPZ19549

Active

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

Martin Geibel c/o Elsner pac Jungpflanzen GbR

2 records

Meiklutz

Active

Rosa L. · Rose

Meilland Alain A.|Antibes, FR

2 records

Meijovaux

Active

Rosa L. · Rose

Worrell Rick,Smith Kristen

2 records

Meigideon

Active

Rosa L. · Rose

ALAIN MEILLAND

2 records

Orange Retz

Active

Carpinus betulus L. · European hornbeam

Jean Blondeau

2 records

OHMADLEVA

Active

Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy

Andrew Bernuetz

2 records

Mariatta

Active

Gerbera L. · Gerbera

Piet Schreurs Holding B.V.

2 records

Marilyn

Active

Hippeastrum Herb. · Amaryllis

Penning Breeding B.V.

2 records

NCRX4

Application submitted

Rhododendron L. · Azalea

Thomas G. Ranney^^^Nathan Lynch^^^Andra Nus^^^Irene Palmer

2 records

Melle

Active

Rhododendron L. · Azalea

Magda De Waele-De Baerdemaeker

2 records

Luiza

Active

Dianthus caryophyllus L. · Carnation

Carlo Moraglia

2 records

Okibana

Active

Gerbera L. · Gerbera

Piet Schreurs Holding B.V.

2 records

OHMADCAMA

Terminated

Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy

Andrew Bernuetz

2 records

MYCUT002

Active

Symphyotrichum novi-belgii (L.) G. L. Nesom · New York aster

Bent Juhl Jensen

2 records

Oberon

Terminated

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Fides B.V.

2 records

Louise

Active

Dahlia Cav. · Dahlia

PanAmerican Seed Europe B.V.

2 records

Magic Princess

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

NWK 4014

Active

Hippeastrum Herb. · Amaryllis

TON PETER VAN NIEUWKERK

2 records

Lucky Angel

Active

Lilium L. · Lily

Van Zanten Flowerbulbs B.V

2 records

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