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.
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
CHRISTA HOFMANN
Tagetes patula L. · French marigold
CNOS Przedsiebiorstwo Nasiennictwa Ogrodniczego sp. z o.o.
Tulipa L. · Tulip
Marax Tulips V.O.F.
Rosa L. · Rose
Mark Gergely
Rosa L. · Rose
Verschuren Rozen B.V.
Tulipa L. · Tulip
G. Buis Bloembollen B.V.
Rosa L. · Rose
Dominique CROIX-RANCHON & Jacques RANCHON (FR)
Tulipa L. · Tulip
Snoek
Tulipa L. · Tulip
G. Buis Bloembollen B.V.
Clematis L. · Clematis
Szczepan Marczyński
Rosa L. · Rose
Andrea Mansuino (IT)
Tulipa L. · Tulip
Marax Tulips V.O.F.
Tulipa L. · Tulip
Holland Bolroy Markt B.V.
Tulipa L. · Tulip
Maveridge Licensing B.V.
Rosa L. · Rose
Paul Croix (FR)
Callistephus chinensis (L.) Nees · China aster
PlantiCo Hodowla i Nasiennictwo Ogrodnicze Swietoslaw sp. z o.o.
Rhododendron simsii Planch. · Indica azalea
Karsten Rannacher
Tulipa L. · Tulip
Mellema-Versteeg B.V.
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Tagetes erecta L. · African marigold
PlantiCo Hodowla i Nasiennictwo Ogrodnicze Swietoslaw sp. z o.o.
Gladiolus L. · Gladiolus
Firma K. en K. Gootjes
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
GOLDSMITH SEEDS
Tulipa L. · Tulip
Vertuco B.V.
Dahlia Cav. · Dahlia
Dongen