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.
Rosa L. · Rose
Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes
Rosa L. · Rose
Werner Kordes / Reimer Kordes / Wilhelm Kordes
Tulipa L. · Tulip
FA. C.J. DEKKER
Rosa L. · Rose
Jarrel van Dam
Ulmus pumila L. · Dwarf elm
Elemér Barabits
Petunia x hybrida hort. ex E. Vilm. · Garden petunia
Priscilla Grace Kerley
Rosa L. · Rose
W.KORDES'SOHNE
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Rosa L. · Rose
Wilhelm Kordes
Rosa L. · Rose
WILHELM-ALEXANDER KORDES
Dahlia Cav. · Dahlia
J. T. WOLTERS
Tulipa L. · Tulip
MTS Mellema-Versteeg
Gerbera L. · Gerbera
Van der Wilt Breeding B.V.
Tagetes patula L. · French marigold
GOLDSMITH SEEDS
Malus domestica (Suckow) Borkh. · Apple
Kalju Kask 85%, Laila Ikase 15%
Gerbera L. · Gerbera
Van der Wilt Breeding B.V.
Prunus dulcis (Mill.) D. A. Webb · Almond
CITA- ARAGON
Chrysanthemum L. · Chrysanthemum
Cleangro Ltd
Lilium L. · Lily
Pieter Cornelis Schenk
Clematis L. · Clematis
Szczepan Marczyński
Clematis L. · Clematis
Szczepan Marczyński
Tulipa L. · Tulip
R.Z. BIOFLEUR
Gerbera L. · Gerbera
HilverdaFlorist B.V.
Gerbera L. · Gerbera
HilverdaFlorist B.V.