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.

Csodálatos Mandarin

Active

Rosa L. · Rose

Mark Gergely

2 records

Crispion Rosar

Active

Tulipa L. · Tulip

P. Koopman

1 record

Dark Soul

Active

Tulipa L. · Tulip

G. Buis Bloembollen B.V.

1 record

CRISTINA

Withdrawn

Rosa L. · Rose

Iuroaea Gheorghe

1 record

Deuce

Active

Lilium L. · Lily

Laan Flora Facilities B.V.

1 record

Desiree

Terminated

Rhododendron simsii Planch. · Indica azalea

STRECK HARALD| Harald Streck

1 record

Diana

Terminated

Gerbera jamesonii Bolus ex Hook. f. · Barberton daisy

Produkcja i Hodowla Roslin Ogrodniczych Krzeszowice sp. z o.o.

1 record

Dama

Terminated

Callistephus chinensis (L.) Nees · China aster

PlantiCo Hodowla i Nasiennictwo Ogrodnicze Golebiew sp. z o.o.

1 record

Demi

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

NIEDERLaeNDER| Andreas Niederlaender

1 record

DELJAUNE

Terminated

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

1 record

Congo

Active

Tulipa L. · Tulip

Remarkable C.V.

1 record

DELTISSE

Protection expired

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

1 record

DELTIL

Terminated

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

1 record

Crown of Negrita

Active

Tulipa L. · Tulip

J.A.Borst Bloembollen B.V.

2 records

DELARLE

Terminated

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

1 record

DELJAM

Terminated

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

1 record

Connie

Terminated

Callistephus chinensis (L.) Nees · China aster

PlantiCo Hodowla i Nasiennictwo Ogrodnicze Szymanów Sp. z o.o.

1 record

Conaco Orange

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

PARATY B.V.B.A

1 record

Delagak

Active

Rosa L. · Rose

Societe Nouvelle des Pepinieres & Roseraies Georges DELBARD (FR)

1 record

DELMIPINK

Terminated

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

1 record

DELILAC

Protection expired

Rosa L. · Rose

Pepinieres et Roseraies Georges Delbard| FR

1 record

Crispion Dark

Active

Tulipa L. · Tulip

Huijg Veredeling B.V.

1 record

Corrado F1

Withdrawn

Allium cepa L. · Onion

Willem van Haerke

2 records

Dante

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

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.