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.

IRTAMB-A23-57

Active

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

IRTA (G. CATALUÑA)

1 record

H218921

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Hydrangea Breeders Association B.V.

1 record

INBOLMANGO

Active

Begonia x tuberhybrida Voss · Tuberous begonia

Silvia Hofmann

1 record

Impulse

Terminated

Dianthus L. · Carnation

La Villetta S.R.L.

1 record

ILVOAIKO02

Withdrawn

Rhododendron simsii Planch. · Indica azalea

Instituut voor Landbouw- en Visserijonderzoek (ILVO) Eenheid Plant

1 record

Greta

Terminated

Kalanchoe Adans. · Kalanchoe

Knud Jepsen A/S

1 record

Flamingo

Terminated

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

HARINI KORLIPARA

1 record

Humberto

Withdrawn

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

1 record

Fisfire

Terminated

Pelargonium L'Hér. ex Ait. · Geranium

Angelika Utecht

1 record

Fisalb

Terminated

Pelargonium L'Hér. ex Ait. · Geranium

Angelika Utecht

1 record

Gfbsfcoros

Terminated

Begonia Semperflorens-Cultorum Group · Bedding Begonia

Shinichi Nishimoto

1 record

Eva

Terminated

Begonia x hiemalis Fotsch · Elatior Begonia

Begonia Breeders Association B.V.

2 records

Gideon Lemon

Terminated

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

1 record

Icon

Active

Tulipa L. · Tulip

Hybris B.V.

1 record

Hilpas

Terminated

Dianthus caryophyllus L. · Carnation

HilverdaKooij B.V

1 record

Hyflet

Application submitted

Clematis montana Buch.-Ham. ex DC. · Anemone clematis

Hyfryd Plants

1 record

Farao

Terminated

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

1 record

Hilskyl

Terminated

Dianthus caryophyllus L. · Carnation

HilverdaFlorist B.V.

1 record

Encore Autumn Empress

Terminated

Rhododendron L. · Azalea

Robert Edward Lee

1 record

Hilmetal

Terminated

Dianthus caryophyllus L. · Carnation

HYBRIDA S.R.L

1 record

Hilfwonder

Terminated

Gerbera L. · Gerbera

HilverdaFlorist B.V.

1 record

Empire

Terminated

Dianthus L. · Carnation

P.Kooij & Zonen B.V.

1 record

Falernian Grapes

Application submitted

Paeonia L. · Peony

Peony Shop Holland V.O.F.

1 record

Hilcati

Terminated

Dianthus caryophyllus L. · Carnation

HilverdaKooij B.V

1 record

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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.