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
W. Kordes Sohne Rosenschulen GmbH & Co KG| DE
Prunus avium (L.) L. · Sweet cherry
Information not available - Contact NL authorities
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Rosa L. · Rose
Philippe Laperriere (Roseraie Laperriere) (FR)/Richard Laperriere (Roseraie Laperriere) (FR)
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Muscari · Grape hyacinth
Ruyter
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Rosa L. · Rose
W.KORDES' SOEHNE ROSENSCHULEN GMBH & CO KG
Rosa L. · Rose
Philippe Laperriere (Roseraie Laperriere) (FR)/Richard Laperriere (Roseraie Laperriere) (FR)
Triticum durum Desf. · Durum wheat
SEMILLAS BATLLE, S.A.
Gerbera L. · Gerbera
Gartenbaubetrieb Wolfgang Bock
Brassica napus L. · Rapeseed
Nilsson, Bengt
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Rosa L. · Rose
R.KORDES
Tulipa L. · Tulip
Fa. J.N. Koster & Zn.
Paeonia L. · Peony
Horobets` Vasyl` Fndorovych
Tulipa L. · Tulip
J.W. Reus Bloembollen B.V.
Saintpaulia H. Wendl. · African violet
OPTIMARA| Optimara-Erfindergemeinschaft GbR, Gebr. Holtkamp
Chrysanthemum L. · Chrysanthemum
Zavidova Liudmyla Hnativna, Horobets Vasyl Fedorovych,
Rosa L. · Rose
Wilhelm Kordes / Tim-Hermann Kordes / Margarita Kordes in Fa. W. Kordes' Söhne Rosenschulen GmbH & Co KG
Rhododendron simsii Planch. · Indica azalea
GLASER HERMANN| Hermann Glaser
Rosa L. · Rose
Ruhe
Rhododendron simsii Planch. · Indica azalea
Karsten Rannacher