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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.

Fragrant Jewel

Active

Narcissus L. · Daffodil

Leenen Innovation B.V.

NL
1 record

Fantasia

Terminated

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

HOFMANN CHRISTA| Dipl.Ing. Christa Hofmann

DE
1 record

FANCY SCHUBERT

Terminated

Dianthus caryophyllus L. · Carnation

BARBERET & BLANC, S.A.

ES
1 record

Falmarin

Active

Lilium L. · Lily

De Jong Beheer B.V.

NL
1 record

Fairline

Active

Tulipa L. · Tulip

Vriend Tulips B.V.

NL
1 record

Formule One

Active

Tulipa L. · Tulip

Testcentrum voor Siergewassen B.V.

NL
1 record

F 7*F 2

Protection expired

Zea mays L. subsp. mays (Maize Group) · Maize

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

FR
1 record

Fair Lady

Terminated

Leucanthemum x superbum (Bergmans ex J. W. Ingram) D. H. Kent · Shasta daisy

Hermann Kuever

DE
1 record

EXTASE

Terminated

Gerbera jamesonii Bolus ex Hook. f. · Barberton daisy

Gebr. GOOSEN BV (NL)

FR
1 record

Flamenco

Active

Calluna vulgaris (L.) Hull · Common heather

Robert Nielsen (Soltauer Baumschulen)

DE
1 record

Flamingo

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

EE
1 record

Everton

Active

Tulipa L. · Tulip

Remarkable C.V.

NL
1 record

Estrella

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

EE
1 record

El Paso

Active

Tulipa L. · Tulip

Fa. A. en L. Duin

NL
1 record

Estella

Terminated

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

ENDISCH WILLIBALD| Willibald Endisch / ENDISCH MARGARETE| Margarete Endisch Geb. Schmieder / ENDISCH WOLF| Wolf Endisch / ENDISCH GERD| Gerd Endisch

DE
1 record

Estrella

Terminated

Gerbera jamesonii Bolus ex Hook. f. · Barberton daisy

Florist De Kwakel B.V. Gerbera Kulturen

PL
1 record

Favoryt

Terminated

Paeonia L. · Peony

Horobets` Vasyl` Fndorovych

UA
2 records

Elda White

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

PARATY B.V.B.A

PL
1 record

Fantasy Lady

Active

Tulipa L. · Tulip

J.W. Reus Bloembollen B.V.

NL
1 record

FANTASIA

Terminated

Pelargonium L'Hér. ex Ait. · Geranium

Christa Hofmann (DE)

FR
1 record

EMERA

Terminated

Rosa L. · Rose

WERNER NOACK

ES
1 record

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