JFS-KW14
ActivePrunus L. · Plum
Warren Keith 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.
MGWAT_2011b
ActiveMagnolia L. · Magnolia
Vance Hooper
KLEPP 06124
ActivePelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium
Nils Klemm
Evera 107
ActiveRosa L. · Rose
Rosa Eskelund
H21-3
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
EVIPO 008
WithdrawnClematis L. · Clematis
Poulsen Roser A/S^^^Raymond J. Evison Ltd.
CA 29
ActiveRosa L. · Rose
Davidson Campbell G. / Dyck Larry J.
Kormiller
ActiveRosa L. · Rose
Wilhelm Kordes Sparrieshoop
BE
DE
FI
FR
HU
NL
+3
21 records
Meitanet
ActiveRosa L. · Rose
SNC Meilland et Cie
DE
DK
ES
FR
HU
IT
+2
23 records
Meicofum
ActiveRosa L. · Rose
S.N.C. Meilland & Cie
DE
FR
HU
IT
NL
PL
22 records
Meidebenne
ActiveRosa L. · Rose
MEILLAND ALAIN ANTOINE
BG
FR
HU
PL
UA
22 records
Korcrisett
ActiveRosa L. · Rose
Wilhem Kordes, Sparrieshoop
BE
DE
ES
FI
FR
HU
+4
19 records
Mulan
ActiveTriticum aestivum L. · Bread wheat
Saaten-Union
BE
EE
HR
HU
LT
PL
+2
24 records
Meibigoud
ActiveRosa L. · Rose
SNC Meilland et Cie
ES
FR
HU
IT
NL
PL
19 records
Poulvic
Application submittedRosa L. · Rose
Poulsen Roser AS, DK - 3480 Fredensborg
DE
DK
FI
FR
IT
NL
+2
17 records
Korazerka
ActiveRosa L. · Rose
Wilhelm Kordes (DE)/Tim-Hermann Kordes (DE)/Margarita Helms (DE)
DE
ES
FI
FR
HU
PL
+2
16 records
Tanelorak
ActiveRosa L. · Rose
Rosen Tantau KG
BE
DE
DK
FR
IT
NL
+1
16 records
Meijasper
ActiveRosa L. · Rose
MEILLAND ALAIN ANTOINE
BG
FR
HU
PL
UA
18 records
Korlumara
ActiveRosa L. · Rose
Wilhen Kordes
DE
HU
NL
PL
16 records
Korbronora
ActiveRosa L. · Rose
Wilhem Kordes, Sparrieshoop
BE
DE
FI
FR
HU
NL
+2
15 records
Pekcougel
ActiveRosa L. · Rose
Pekmez, Paul|La Petite Pierre, 67290 Wingen-sur-Moder, France
DE
ES
FR
IT
NL
16 records
Poulann
Application submittedRosa L. · Rose
Poulsen Roser AS, DK - 3480 Fredensborg
DE
DK
FR
IT
NL
PL
+1
16 records
Tanorelav
ActiveRosa L. · Rose
ROSEN-TANTAU MATHIAS-TANT
BE
DE
ES
FR
IT
NL
+1
14 records
Ruisteenka
ActiveRosa L. · Rose
Steenks, J. E.|Baarlo, Netherlands
BE
DE
ES
FR
IT
NL
+1
14 records