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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.

Bonmadcrio

Terminated

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

Dr Andrew Bernuetz, Bonza Botanicals Pty Ltd

2 records

Bilbao

Active

Dahlia Cav. · Dahlia

PETER J.M. VAN SCHIE

3 records

DCHRVNSCOP

Active

Scabiosa atropurpurea L. · Mourning bride

Gavriel Danziger

2 records

Bonita

Active

Prunus dulcis (Mill.) D. A. Webb · Almond

Pavcik, Joseph

2 records

BFCCSAB

Active

Clematis lanuginosa Lindl. & Paxton

Barry Fretwell

2 records

Diantha

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

Dark Yoelmira

Terminated

Chrysanthemum L. · Chrysanthemum

Wendy Bergman

2 records

DCALNOADBZ

Terminated

Calibrachoa Cerv. · Calibrachoa

Gavriel Danziger

2 records

Caserta

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

3 records

Diamant

Protection expired

Delphinium L. · Larkspur

Firma Kwekerij Delphi V.O.F.

2 records

Devon Pearl

Protection expired

Dianthus L. · Carnation

H.R. WHETMAN & SON

2 records

Delphis Pink Power

Active

Delphinium elatum L. · Alpine delphinium

Firma Kwekerij Delphi V.O.F.

2 records

Daskat

Active

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

Jensen Bent Juhl|Malling, DK

2 records

Delipraline

Terminated

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

3 records

Delipaladov

Active

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

2 records

Delifuego

Active

Chrysanthemum L. · Chrysanthemum

Arie Gerard Post

2 records

Dangypfun

Terminated

Gypsophila L. · Baby's breath

Gavriel Danziger

2 records

Baryre

Terminated

Dianthus caryophyllus L. · Carnation

DONATO DI GIORGIO

2 records

Barpimisisi

Terminated

Dianthus caryophyllus L. · Carnation

Emilio Cano

2 records

Barjamocar

Terminated

Dianthus caryophyllus L. · Carnation

DONATO DI GIORGIO

2 records

BKPBECLR

Active

Begonia x hiemalis Fotsch · Elatior Begonia

Beekenkamp Annie Cornelia

2 records

DANOA86

Terminated

Calibrachoa Cerv. · Calibrachoa

Gavriel Danziger

2 records

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