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.

Submarine

Terminated

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

2 records

Sointu

Active

Rosa L. · Rose

Matti Kangaspunta, Peter Joy, Pirkko Kahila

2 records

Stamjauplein

Active

Chrysanthemum L. · Chrysanthemum

Jacques Stamens

2 records

SIL Liske

Active

Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium

ILSE FISCHER-TOEHL

2 records

Ruizweef

Terminated

Rosa L. · Rose

Mr A.A. Pouw, De Ruiter's Nieuwe Rozen BV

2 records

SMNHSDD

Active

hybrids between Hydrangea macrophylla (Thunb.) Ser. and Hydrangea serrata (Thunb.) Ser.

Wood Timothy

2 records

Sky Dance

Active

Tulipa L. · Tulip

Testcentrum voor Siergewassen B.V.

2 records

Staviski White

Active

Chrysanthemum L. · Chrysanthemum

PARATY B.V.B.A

2 records

Saucobol

Active

Rosa L. · Rose

Bernard Sauvageot

2 records

SIL Wiebke

Active

Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium

ILSE FISCHER-TOEHL

2 records

Sundaho

Terminated

Petunia Juss. · Petunia

Kiyoshi Miyazaki^^^Kazunari Iwaki

2 records

Secret Romance

Active

Echinacea Moench. · Coneflower

Korlipara Harini

3 records

Snowball

Active

Campanula trachelium L. · Nettle-leaf bellflower

TERRA NOVA NURSERIES INC

2 records

Robleze

Active

Rhododendron L. · Azalea

RUSSELL KIPLING MCCONNELL

2 records

Sicardo Orange

Terminated

Chrysanthemum L. · Chrysanthemum

PARATY B.V.B.A

2 records

Scarlet Storm

Active

Chaenomeles speciosa (Sweet) Nakai · Chinese-quince

Thomas G. Ranney

2 records

Shimmer

Application submitted

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

2 records

SAT1307001

Active

Rosa L. · Rose

Leendert de Kloe

2 records

RFDD

Active

Agapanthus L'Hér. · Lily of the Nile

CAPE SEED AND BULB (PTY) LTD

2 records

Soft Music

Active

Lilium L. · Lily

Rooijakkers Breezand B.V.

2 records

SIL Raiko

Active

Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium

ILSE FISCHER-TOEHL

2 records

Storm Cloud

Active

Geranium pratense L. · Meadow crane's-bill

Warrington Helen

2 records

SIL Baldo

Active

Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium

ILSE FISCHER-TOEHL

2 records

SMNMAKTSR

Terminated

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

Wood Timothy D

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.