White House
TerminatedGerbera L. · Gerbera
FLORIST HOLLAND B.V.
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.
Tocca Orange
ActiveChrysanthemum L. · Chrysanthemum
PARATY B.V.B.A
Toast
TerminatedGerbera L. · Gerbera
FLORIST HOLLAND B.V.
Uhlsylt
ActiveRosa L. · Rose
UHL JÜRGEN
Wesdiwit
TerminatedDianthus caryophyllus L. · Carnation
West Select B.V.
Twin Pearl
ActiveHyacinthus orientalis L. · Common hyacinth
Boeket Handelmaatschappij B.V.
TAN11273
ActiveRosa L. · Rose
CHRISTIAN EVERS
Trentino
ActiveLilium L. · Lily
Vletter & Den Haan Beheer B.V
Thesla
ActiveRhododendron simsii Planch. · Indica azalea
BOONE DIRK
TAN05233
ActiveRosa L. · Rose
CHRISTIAN EVERS
TAN03162
ActiveRosa L. · Rose
CHRISTIAN EVERS
Victoria Ulla
ActiveSymphyotrichum novi-belgii (L.) G. L. Nesom · New York aster
Erwin Hansen
Synyel Lucien
TerminatedChrysanthemum L. · Chrysanthemum
Wendy Bergman
Uhlrom
ActiveRosa L. · Rose
UHL JÜRGEN
Uhlarium
ActiveRosa L. · Rose
UHL JÜRGEN
Taxco
ActiveDahlia Cav. · Dahlia
Green Works International B.V.
Twyford
ActiveLilium L. · Lily
Vletter & Den Haan Beheer B.V
VELNYM
ActiveHippeastrum Herb. · Amaryllis
TON PETER VAN NIEUWKERK
Summer Night
ActiveHibiscus syriacus L. · Rose of Sharon
Jacobus Johannes Maria Lambalk
TAN09562
ActiveRosa L. · Rose
CHRISTIAN EVERS
TAN04302
ActiveRosa L. · Rose
CHRISTIAN EVERS
TAN01780
ActiveRosa L. · Rose
CHRISTIAN EVERS
TOSTD0460
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Monte-Michielsen Fabienne
TOSTD0188
ActivePelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Monte-Michielsen Fabienne