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
Wilhelm Kordes, W Kordes' Sohne
Pelargonium L'Hér. ex Ait. · Geranium
GUILLOU FRERES (FR)
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
UTECHT| Angelika Utecht in Fa. Syngenta Seeds GmbH -Niederlassung-
Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium
UTECHT| Angelika Utecht in Fa. Syngenta Seeds GmbH -Niederlassung-
Pelargonium L'Hér. ex Ait. · Geranium
GUILLOU FRERES (FR)
Pelargonium L'Hér. ex Ait. · Geranium
Hofmann Christa
Helianthus annuus L. · Sunflower
Dobrudzha Agricultural Institute
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
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
Poulsen Roser A/S
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Michalik Andrea|Dresden, DE
Prunus dulcis (Mill.) D. A. Webb · Almond
IRTA CENTRE MAS BOVE
Rosa L. · Rose
SCHREURS PETRUS NICOLAAS JOHANNES
Malus domestica (Suckow) Borkh. · Apple
Volz Richard
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Poulsen Roser A/S
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Michalik Andrea|Dresden, DE
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
WILHEM ELSNER
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Martin Geibel c/o Elsner pac Jungpflanzen GbR
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Michalik Andrea|Dresden, DE