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.

Iceberg

Active

Tulipa L. · Tulip

Future Rights B.V

1 record

Ice Age

Active

Tulipa L. · Tulip

Huijg Veredeling B.V.

1 record

JADE

Terminated

Chrysanthemum indicum L. · Indian chrysanthemum

YODER PLANT TRADING GmbH (DE)

1 record

Hot Ring

Active

Rosa L. · Rose

Iuroaea Gheorghe

2 records

Hilnatwi

Active

Dianthus L. · Carnation

HILVERDA JAN JOHANNES

1 record

HORCOHORT

Terminated

Rosa L. · Rose

Colin Horner (GB)

1 record

INTROPI

Terminated

Rosa L. · Rose

INTERPLANT BV (NL)

1 record

INTERSTREEP

Terminated

Rosa L. · Rose

INTERPLANT BV (NL)

1 record

Hart van Alkmaar

Active

Narcissus L. · Daffodil

Brian S. Duncan

1 record

INGRID

Terminated

Saintpaulia ionantha H. Wendl. · African violet

OPTIMARA ERFINDERGEMEINSCHAFT, GEBR. HOLTKAMP

1 record

Hena

Terminated

Matthiola incana (L.) R. Br. · Hoary stock

Hodowla i Nasiennictwo Roślin Ogrodniczych Waganiec sp. z o.o.

1 record

Ice Cream Sorbet

Active

Tulipa L. · Tulip

Vertuco B.V.

1 record

Ice Cream Banana

Active

Tulipa L. · Tulip

Vertuco B.V.

1 record

Helena

Terminated

Dianthus caryophyllus L. · Carnation

Hodowla Roślin Bronisze sp. z o.o.

1 record

Hranatovyi Braslet

Application submitted

Rosa L. · Rose

Klymenko Zinaida Kostiantynivna

2 records

HARGLISSER

Terminated

Rosa L. · Rose

HARKNESS ROSES and Co Ltd (GB)

1 record

Guitrasha

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

SAS Sauvé-Guittet

1 record

HARZELT

Protection expired

Rosa L. · Rose

HARKNESS ROSES and Co Ltd (GB)

1 record

HAPLONA

Terminated

Brassica napus var. napus · Rapeseed

PLANT BREEDING INTERNATIONAL CAMBRIDGE

2 records

GUITKEA

Terminated

Chrysanthemum indicum L. · Indian chrysanthemum

Maurice Guittet (FR)

1 record

GUITFOSIT

Protection expired

Chrysanthemum indicum L. · Indian chrysanthemum

Maurice Guittet (FR)

1 record

HANNE

Terminated

Rosa L. · Rose

PETER KAASTRUP

1 record

Hala

Terminated

Matthiola incana (L.) R. Br. · Hoary stock

PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.

1 record

HMv 5435 HMv 5405

Terminated

Zea mays L. · Maize

Kizmus Lajos, Pinter Janos, Marton L. Csaba, Hadi Geza, Szundy Tamas,

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.