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.
Avena sativa L. · Oat
Saastamoinen, Marketta
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
CHRISTIAN EVERS
Rosa L. · Rose
HANS JURGEN EVERS (T)
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Weeks Roses Inc (US)
Rosa L. · Rose
Weeks Roses Inc (US)
Rosa L. · Rose
Weeks Roses Inc (US)
Rosa L. · Rose
Weeks Roses Inc (US)
Cucumis sativus L. · Cucumber
NUNHEMS
Lilium L. · Lily
Mak Nicolaas Aloysius Maria
Pisum sativum L. · Pea
Syngenta Seeds
Rosa L. · Rose
Hans-Juergen Evers
Rosa L. · Rose
Rosen Tantau KG
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Aster L. · Aster
Michael Danziger
Pisum sativum L. · Pea
Seminis Vegetable Seeds
Chrysanthemum L. · Chrysanthemum
Chrysanthemum Breeders Association Research B.V.
Gerbera L. · Gerbera
SCHREURS PETRUS JUDOCUS WILHELMUS
Rosa L. · Rose
Nola Simpson (NZ)
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
ILSE FISCHER-TOEHL