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.
Chrysanthemum x morifolium Ramat. · Florist's daisy
Nicolaas P. Dekker
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Chrysanthemum L. · Chrysanthemum
Knaap, J. C. M. van der|De Lier, Netherlands
Rosa L. · Rose
Weeks Roses Inc (US)
Rosa L. · Rose
Weeks Roses Inc (US)
Brassica napus var. napus · Rapeseed
D J Van der Have BV (NL)
Brassica napus var. napus · Rapeseed
D J Van der Have BV (NL)
Cucumis sativus L. · Cucumber
NUNHEMS
Brassica napus var. napus · Rapeseed
Wallace A Cowling, Canola Breeders Western Australia Pty Ltd
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
OWENS A.
Rosa L. · Rose
HANS JURGEN EVERS (T)
Rosa L. · Rose
Rosen-Tantau Mathias Tantau Nachfolger
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Rosa L. · Rose
Hans-Juergen Evers
Rosa L. · Rose
Hans Jurgens Evers (DE)
Aster L. · Aster
Dehan, Klara|Holon, Israel
Chrysanthemum x morifolium Ramat. · Florist's daisy
Noodelijk, Robert / Noodelijk, Robert
Triticum aestivum L. · Bread wheat
Johansson, Nils
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Rosa L. · Rose
Starkl, Ludwig|Vienna, Austria
Impatiens walleriana Hook. f. · Busy Lizzie
Ellen Leue
Impatiens walleriana Hook. f. · Busy Lizzie
Ellen Leue
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
ILSE FISCHER-TOEHL
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
ILSE FISCHER-TOEHL