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.

Vancouver

Active

Freesia Eckl. ex Klatt · Freesia

Penning Breeding B.V.

1 record

UTP Salmon Gardy

Active

Chrysanthemum x morifolium Ramat. · Florist's daisy

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich

1 record

UTP Profesor Zalewska

Active

Chrysanthemum x morifolium Ramat. · Florist's daisy

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich

1 record

VITA

Active

Rosa L. · Rose

Dzidra Rieksta

1 record

VAN STRAELEN

Terminated

Rhododendron L. · Azalea

MANTEN HEINZ

1 record

Twin Sisters

Active

Triteleia Dougl. ex Lindl. · Triplet Lily

Royal Blue B.V.

1 record

Verona Ice

Active

Tulipa L. · Tulip

Meelebo B.V.

1 record

Twin

Active

Triteleia Dougl. ex Lindl. · Triplet Lily

Royal Blue B.V.

1 record

Tsvityk Semytsvityk

Terminated

Chrysanthemum L. · Chrysanthemum

Arbats`ka IUta IAroslavna, Holubieva Tamara Petrivna, Sholokhova Tetiana Oleksandrivna,

2 records

Valeska

Active

Tulipa L. · Tulip

Lutjefleur Bloemisterij

1 record

UH 009

Terminated

Zea mays L. · Maize

Dr. D. Klein / Prof. Dr. A. E. Melchinger / INAKTIV Versuchsstation für Pflanzenzüchtung Eckartsweier Herrn Dr. Wolfgang Schipprack

1 record

Twin Sensation

Active

Hyacinthus · Hyacinth

Cooperatieve Kwekersvereniging Hyacinthus U.A.

1 record

Toronto Double

Terminated

Tulipa L. · Tulip

Poel B.V.

1 record

Trustful

Application submitted

Tulipa L. · Tulip

G. Buis Bloembollen B.V.

1 record

Tiny Double Dutch

Active

Lilium L. · Lily

Mak Breeding Rights B.V.

1 record

Terano

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

PARATY B.V.B.A

1 record

Tetry Lucky

Withdrawn

Tulipa L. · Tulip

Beerepoot B.V.

1 record

Tristan

Terminated

Saintpaulia H. Wendl. · African violet

LAMPE ULRICH| Ulrich Lampe

1 record

Titania SWE

Terminated

Tagetes erecta L. · African marigold

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

1 record

Tantasch (R)

Withdrawn

Rosa L. · Rose

Evers Hans Jurgen

1 record

Thunderball

Active

Tulipa L. · Tulip

Boon Brothers Flowerbulbs

1 record

Talika

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

1 record

TANORSTAR

Protection expired

Rosa L. · Rose

Mathias Tantau (DE)

1 record

Tanmitiram

Terminated

Rosa L. · Rose

EVERS HANS-JUERGEN| Hans-Juergen Evers

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.