Variety traits
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.
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.
Rhododendron L. · Azalea
KARL GLASER
Dianthus L. · Carnation
BRIZARD JEAN
Dianthus caryophyllus L. · Carnation
LEK-ZONEN
Clematis L. · Clematis
Szczepan Marczyński
Sorghum bicolor (L.) Moench · Sorghum
Coffey Forage Seed (US)
Tulipa L. · Tulip
G. & K. Reus V.O.F.
Zea mays L. subsp. mays (Maize Group) · Maize
Poljoprivredni Institut Osijek, HR
Dianthus caryophyllus L. · Carnation
van Staaveren B.V.
Dianthus caryophyllus L. · Carnation
van Staaveren B.V.
Dianthus L. · Carnation
NATURA BREEDERS S.A.
Allium cepa L. var. cepa · Onion
Nunhems B.V.
Sorghum bicolor (L.) Moench subsp. bicolor · Sorghum
ASGROW SEED CO
Gerbera L. · Gerbera
FLORIST HOLLAND B.V.
Tulipa L. · Tulip
Hybris B.V.
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Exacum affine Balf. f.
Ex-Plant ApS
Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium
Cultius Roig Sat 626 Cat, Institut de Recerca í Tecnologia Agroalimentàries (IRTA)
Saintpaulia ionantha H. Wendl. · African violet
Kwekerij Mariënoord B.V.
Rudbeckia hirta L. · Black-eyed Susan
Nova Perenne B.V.
Humulus lupulus L. · Common hop
Roger D Jeske
Gerbera L. · Gerbera
FLORIST HOLLAND B.V.
Tulipa L. · Tulip
Hybris B.V.
Rosa L. · Rose
HANS JURGEN EVERS (T)
Dianthus caryophyllus L. · Carnation
Barberet & Blanc S.A.