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
Chyzhankova Valentyna Ivanivna, Rubtsova Olena Leonidivna,
Pelargonium graveolens L'Hér. · Rose geranium
GUILLOU BERNARD / GUILLOU JACQUES / GUILLOU MAURICE
Chrysanthemum x morifolium Ramat. · Florist's daisy
SAS Sauvé-Guittet
Chrysanthemum indicum L. · Indian chrysanthemum
Maurice Guittet (FR)
Chrysanthemum indicum L. · Indian chrysanthemum
Maurice Guittet (FR)
Pelargonium graveolens L'Hér. · Rose geranium
GUILLOU BERNARD / GUILLOU JACQUES / GUILLOU MAURICE
Chrysanthemum x morifolium Ramat. · Florist's daisy
SAS Sauvé-Guittet
Rosa L. · Rose
Roseraie Guillot Scea (FR)
Gerbera jamesonii Bolus ex Hook. f. · Barberton daisy
Florist De Kwakel B.V. Gerbera Kulturen
Rosa L. · Rose
HARKNESS ROSES and Co Ltd (GB)
Tulipa L. · Tulip
Vertuco B.V.
Tulipa L. · Tulip
Vertuco B.V.
Rosa L. · Rose
HETZEL| Karl Hetzel (+)
Lilium L. · Lily
Q.J. Vink & Zn. B.V.
Tulipa L. · Tulip
Gebr. Boon Hem B.V./Borst Rights B.V.
Paeonia lactiflora Pall. · Chinese peony
Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka
Tulipa L. · Tulip
Klaver bloembollen B.V.
Chrysanthemum x morifolium Ramat. · Florist's daisy
SAS Sauvé-Guittet
Narcissus L. · Daffodil
C.Th. Ammerlaan en Zn. B.V.
Helianthus annuus L. · Sunflower
DAKOTA UNIV.
Tulipa L. · Tulip
Vertuco B.V.
Tulipa L. · Tulip
Romein
Hippeastrum Herb. · Amaryllis
Park Amaryllis V.O.F.
Tulipa L. · Tulip
Firma Gebroeders Hopman Pzn.