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.

Koes

Active

Dianthus caryophyllus L. · Carnation

HilverdaKooij B.V

2 records

JS Barts Blue Beauty

Active

Aster L. · Aster

Spruyt Select CommV

2 records

KLECA18514

Active

Calibrachoa Cerv. · Calibrachoa

Klemm + Sohn GmbH & Co. KG^^^Nils Klemm^^^Anita Stöver

2 records

ILVOAIKO01

Active

Rhododendron simsii Planch. · Indica azalea

Instituut voor Landbouw- en Visserijonderzoek (ILVO) Eenheid Plant

2 records

Korengir

Terminated

Rosa L. · Rose

Wilhelm Kordes

2 records

Ilo

Active

Rosa L. · Rose

Peter Joy, Pirkko Kahila, Matti Kangaspunta

2 records

IFANFRAP

Active

Anemone hupehensis Lemoine · Japanese anemone

Spil Glenn

2 records

KLEN02437

Active

Dianthus caryophyllus L. · Carnation

Per Klemm

2 records

KLEDS11149

Active

Dianthus caryophyllus L. · Carnation

HYBRIDA S.R.L

2 records

KLEDP18090

Withdrawn

Dianthus caryophyllus L. · Carnation

Klemm + Sohn GmbH & Co. KG^^^Nils Klemm^^^Lena Thiede

2 records

KLEDP15181

Active

Dianthus caryophyllus L. · Carnation

Nils Klemm^^^Martin Glawe^^^Lena Thiede

2 records

KLEDM10629

Active

Dianthus caryophyllus L. · Carnation

PER KLEMM|TRAUDE MUNDINGER-FLAD

2 records

KLEDH24725

Active

Dahlia Cav. · Dahlia

MAIKE BOXRIKER

2 records

KLEDG20336

Active

Dianthus caryophyllus L. x Dianthus gratianopolitanus Vill.

Thiede Lena

2 records

Kersusi

Active

Petunia Juss. · Petunia

DAVID WILLIAM KERLEY|PRISCILLA GRACE KERLEY|TIMOTHY EDWARD KERLEY

2 records

Kerriprosy

Active

Petunia Juss. · Petunia

Priscilla Grace Kerley, David William Kerley

2 records

Kerjul

Terminated

Petunia Juss. · Petunia

Priscilla Grace Kerley

2 records

Lady Spring

Terminated

Dianthus caryophyllus L. · Carnation

Emilio Cano

2 records

Kerbelcarmen

Active

Primula vulgaris Huds. · Primrose

Priscilla Grace Kerley, Sarah Elisabeth Kerley, David William Kerley, Timothy Edward Kerley

2 records

Kowipa

Active

Dianthus L. · Carnation

P.Kooij & Zonen B.V.

2 records

Kortinava

Terminated

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

2 records

Kadango

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

Intertrorats

Terminated

Rosa L. · Rose

Interplant Roses B.V

2 records

Intertronig

Active

Rosa L. · Rose

Interplant Roses 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.