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.

SMNSHBBL

Active

Syringa L. · Lilac

Wood Timothy D

4 records

Sweberry

Active

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

Michalik Andrea|Fanny-Lewald Str., DE

4 records

Silte Oransar

Active

Impatiens walleriana Hook. f. · Busy Lizzie

Jonkers Johanna B.|Andijk, NL / Smit Erik|Enkhuizen, NL

4 records

RWoods5

Active

Hibiscus syriacus L. · Rose of Sharon

Woods Roderick

5 records

Spebrown

Active

Rosa L. · Rose

Jan Spek Rozen B.V.

5 records

Silte Pinkcie

Active

Impatiens walleriana Hook. f. · Busy Lizzie

Jonkers Johanna B.|Andijk, NL / Smit Erik|Enkhuizen, NL

4 records

Silte Redsar

Active

Impatiens walleriana Hook. f. · Busy Lizzie

Smit Erik|Andijk, NL

4 records

Silt Cher

Active

Impatiens walleriana Hook. f. · Busy Lizzie

Krassenburg Jolanda|Andijk, NL

4 records

POULyc008

Active

Rosa L. · Rose

Poulsen Roser A/S

4 records

Poulty007

Application submitted

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

4 records

Poultc013

Active

Rosa L. · Rose

Poulsen Roser A/S

5 records

Poultc004

Application submitted

Rosa L. · Rose

Poulsen Roser A/S

4 records

POULshrimp

Active

Rosa L. · Rose

Poulsen Roser A/S

4 records

Poulren019

Active

Rosa L. · Rose

Poulsen Roser A/S

4 records

Poulra001

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

4 records

Poulpal039

Active

Rosa L. · Rose

Poulsen Roser A/S

4 records

Poulpal028

Terminated

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

4 records

Poulpah054

Active

Rosa L. · Rose

Poulsen Roser A/S

5 records

POULhi009

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

4 records

Poulcy014

Active

Rosa L. · Rose

Poulsen Roser A/S

5 records

Poulcas037

Active

Rosa L. · Rose

Poulsen Roser A/S

5 records

Poulty011

Active

Rosa L. · Rose

Poulsen Roser A/S

5 records

PKM07

Active

Campanula L. · Bellflower

Madsen Christian Hald

5 records

Poulpar045

Application submitted

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

4 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.