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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.

NOTWOOD TWO

Active

Hibiscus L. · Hibiscus

Roderick I. Woods

3 records

Noa 195597

Active

Rosa L. · Rose

Reinhard Noack

3 records

Korfloci 111

Active

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

3 records

Korhulth 003

Active

Rosa L. · Rose

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

3 records

Korfloci 08

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

3 records

KLEPP 07196

Active

Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium

Nils Klemm

3 records

WP 05 IDARE

Active

Dianthus L. · Carnation

John Whetman

3 records

Evera 129

Active

Rosa L. · Rose

Rosa Eskelund

3 records

TAN 04179

Active

Rosa L. · Rose

CHRISTIAN EVERS

3 records

Korsilu 06

Active

Rosa L. · Rose

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

3 records

TAN 97607

Active

Rosa L. · Rose

Hans-Juergen Evers

3 records

KLEIZ 13338

Terminated

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

Nils Klemm^^^Martin Glawe

3 records

KLEDH 10032

Active

Dahlia Cav. · Dahlia

ANDREA DOHM|NILS KLEMM

3 records

RLH1 9P7

Active

Rhododendron L. · Azalea

Robert Harold Head^^^Lisa Jones Head

3 records

Evera 106

Active

Rosa L. · Rose

Rosa Eskelund

3 records

MINITIARA LILAC

Active

Dianthus caryophyllus L. · Carnation

SEO RYUSUKE|YAMAMOTO KAZUHITO|MANABE YOSHIAKI|MORI KENTO

3 records

Evera 126

Active

Rosa L. · Rose

Rosa Eskelund

3 records

Evera 116

Active

Rosa L. · Rose

Rosa Eskelund

3 records

VDH 1460-88

Terminated

Brassica napus var. napus · Rapeseed

PUSTJENS| M.J.J. Pustjens c/o Limagrain Advanta Nederland B.V.

DE FR
3 records

Mansis-Sissy

Active

Dianthus L. · Carnation

DIANTHUS S.S. (IT)

FR IT
2 records

HAD LADY

Withdrawn

Rosa L. · Rose

HARVEY DAVIDSON (US)

BE FR
2 records

Sugar Gloss

Active

Solanum lycopersicum L. · Tomato

Syngenta Seeds B.V.

NL
3 records

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