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.
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Inaba Masaru
Dianthus caryophyllus L. · Carnation
BARBERET & BLANC, S.A.
Lilium L. · Lily
Q.J. Vink & Zn. B.V.
Rhododendron simsii Planch. · Indica azalea
HARMSEN| Georg Harmsen
Paeonia lactiflora Pall. · Chinese peony
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Saintpaulia H. Wendl. · African violet
FISCHER ARNOLD| Arnold Fischer
Rosa L. · Rose
BEAR CREEK GARDENS Inc. (US)
Chrysanthemum x morifolium Ramat. · Florist's daisy
VANDENBERG| Cornelis P. Vandenberg
Tagetes patula L. · French marigold
CNOS Przedsiebiorstwo Nasiennictwa Ogrodniczego sp. z o.o.
Callistephus chinensis (L.) Nees · China aster
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Delphinium L. · Larkspur
Westhoff
Begonia x hiemalis Fotsch · Elatior Begonia
MAN| J. Man
Tulipa L. · Tulip
Vertuco B.V.
Tulipa L. · Tulip
Vertuco B.V.
Tulipa L. · Tulip
INRA Co/Agri Obtentions
Tulipa L. · Tulip
Vriend Flower Bulbs B.V.
Chrysanthemum indicum L. · Indian chrysanthemum
William E. DUFFETT (US)/JESSEL H. WALTER (FR)
Rosa L. · Rose
Dominique CROIX-RANCHON & Jacques RANCHON (FR)
Tulipa L. · Tulip
Hybris B.V.
Tulipa L. · Tulip
Sylvestris B.V.
Tulipa L. · Tulip
Vertuco B.V.
Rosa L. · Rose
Mark Gergely / Mark Gergelyne
Tulipa L. · Tulip
Vertuco B.V.
Tulipa L. · Tulip
Vertuco B.V.