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.

Jubilee

Active

Pisum sativum L. · Pea

Limagrain UK

5 records

Ivtahockey

Active

Rosa L. · Rose

STICHTING DLO-CENTRUM VOOR PLANTENVEREDELINGS-EN

3 records

Jacimgol

Active

Rosa L. · Rose

DR KEITH ZARY

3 records

Jacale

Protection expired

Rosa L. · Rose

Warriner, William A.|Tustin, CA

3 records

Ingrid Bergman

Protection expired

Rosa L. · Rose

PERNILLE & MOGENS N.OLESE

4 records

Hillipinbar

Active

Dianthus L. · Carnation

SEICHI MIYOSHI

3 records

Hawking

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

7 records

Interiza

Terminated

Rosa L. · Rose

G.P.Ilsink

3 records

Helkleger

Protection expired

Rosa L. · Rose

Karle Hertzel

3 records

IFECSSPP

Active

Echinacea Moench. · Coneflower

Spil Glenn

3 records

Harqueterwife

Protection expired

Rosa L. · Rose

R. HARKNESS & CO. LTD.

3 records

Harbits

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Wood Timothy D

3 records

Harukfore

Protection expired

Rosa L. · Rose

HARKNESS ROSES and Co Ltd (GB)

3 records

Hilmaria

Active

Dianthus L. · Carnation

HILVERDA JAN JOHANNES

3 records

Hilchertes

Active

Dianthus caryophyllus L. · Carnation

Jan Johannes Hilverda

3 records

Hilroytes

Active

Dianthus caryophyllus L. · Carnation

Jan Johannes Hilverda

3 records

Helsufair

Protection expired

Rosa L. · Rose

Karl Hetzel

3 records

Hilbert

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

6 records

GK Szindbád

Terminated

Triticum aestivum L. · Bread wheat

Pauk Janos / Kertesz Zoltan / Matuz Janos / Barabas Zoltan / Pusztai Istvanne / Beke Bela / Oltvanyi Sandorne

3 records

GK Gobe

Protection expired

Triticum aestivum L. · Bread wheat

Barabas Zoltan / Kertesz Zoltan / Matuz Janos / Schulcz Jozsefne / Beke Bela / Bona Lajos / Csoesz Laszlone / Mesterhazy Akos / Pauk Janos

6 records

GK Kunsag

Terminated

Triticum aestivum L. · Bread wheat

Purnhauser Laszlo / Matuz Janos / Kertesz Zoltan / Beke Bela / Bona Lajos / Nagyne Kutni Rozalia / Petroczi Istvan Mihaly / Becsey Magdolna

3 records

GK Fehér

Active

Triticum aestivum L. subsp. spelta (L.) Thell. · Spelt

Gabonakutató Nonprofit Közhasznú Kft, Szeged

4 records

GK Delibab

Terminated

Triticum aestivum L. · Bread wheat

Barabas Zoltan / Kertesz Zoltan / Matuz Janos / Pauk Janos / Beke Bela / Schulz Jozsefne / Bona Lajos / Csoesz Laszlone

3 records

Fryminicot

Protection expired

Rosa L. · Rose

Fryers Nurseries Ltd

3 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.