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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.

Peachy Queen

Active

Freesia Eckl. ex Klatt · Freesia

Penning Breeding B.V.

NL
1 record

Sevenna

Application submitted

Lilium L. · Lily

De Looff World Breeding B.V.

NL
1 record

Soft Price

Active

Tulipa L. · Tulip

Triflor Breeding Rights B.V.

NL
1 record

Royal Navy

Active

Hyacinthus · Hyacinth

"Bloembollenkwekerij J.S. Pennings ""De Bilt""

NL
1 record

Orange Passion

Active

Tulipa L. · Tulip

Testcentrum voor Siergewassen B.V.

NL
3 records

M13G30

Active

Zea mays L. · Maize

MONSANTO TECHNOLOGY

IT
1 record

Pink Dream

Active

Clematis L. · Clematis

Szczepan Marczyński

PL
2 records

Hip-Hop

Active

Begonia L. · Begonia

Hoefnagels B.V.

NL
1 record

Heartbreaker

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

NL
1 record

Hatrick

Active

Tulipa L. · Tulip

J.A.Borst Bloembollen B.V.

NL
2 records

Bolero

Active

Begonia L. · Begonia

Hoefnagels B.V.

NL
1 record

DN Eirena

Active

Zea mays L. · Maize

Satarova Tetiana Mykolaivna, Kulyk Viktor Oleksandrovych, Kyrpa Mykola IAkovych, Nehoda Tetiana Volodymyrivna, Olizko Oleksii Petrovych, Abelmasov Oleksii Viktorovych, Haidash Oleksandr Leonidovych, Bodenko Natalia Anatoliivna, Cherchel Vladyslav IUriiovy

UA
2 records

Trustfull

Active

Tulipa L. · Tulip

Hybris B.V.

1 record

StoX Yellow

Active

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

Evanthia B.V.

1 record

URIGOLD01

Active

Spiraea prunifolia Siebold & Zucc. · bridal-wreath spiraea

Uriseed Institute

1 record

Stox Deep Rose

Active

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

Evanthia B.V.

1 record

Laureen

Terminated

Kalanchoe blossfeldiana x kalanchoe laciniata · Flaming Katy

Knud Jepsen

1 record

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