Poulpah092
ActiveRosa L. · Rose
Poulsen Roser A/S
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.
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
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.
Poulpah084
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulpah077
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulpah067
ActiveRosa L. · Rose
Poulsen Roser A/S
POULen011
ActiveRosa L. · Rose
Poulsen Roser A/S
POULen003
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulcy029
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulcas058
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulcas051
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulcas044
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulcas018
ActiveRosa L. · Rose
Poulsen Roser A/S
Poulans
ActiveRosa L. · Rose
Poulsen Roser A/S
POULac018
ActiveRosa L. · Rose
Poulsen Roser A/S
Phwns
ActiveZea mays L. · Maize
PIONEER HI-BRED INTERNATIONAL
Patriot Cranberry Red
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
OGLEVEE LTD
Pacan
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
CHRISTA HOFMANN
Overedclimb
ActiveRosa L. · Rose
Overom, Julie
Pixie Star
Protection expiredDianthus L. · Carnation
Whetman Pinks
Moxie
ActiveGaillardia x grandiflora hort. ex Van Houtte · Blanket flower
John A. Dixon
Pacbla
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
CHRISTA HOFMANN
PEQZ0037
Protection expiredhybrids between Pelargonium peltatum and Pelargonium zonale · Ivy-leaved geranium
Syngenta Seeds B.V.
Noa16071
ActiveRosa L. · Rose
Reinhard Noack
PEQZ0011
ActivePelargonium L'Hér. ex Ait. · Geranium
Syngenta Flowers LLC
PEMAN PFC 1
ActiveDianthus caryophyllus L. · Carnation
Miyoshi & Co.