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.
Gerbera L. · Gerbera
SCHREURS PETRUS JUDOCUS WILHELMUS
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Dianthus caryophyllus L. · Carnation
S.KLEMM
Dianthus caryophyllus L. · Carnation
West Stek B.V.
Dianthus caryophyllus L. · Carnation
S.KLEMM
Dianthus L. · Carnation
Siegfried KLEMM (DE)
Rosa L. · Rose
H.A.VERSCHUREN EN ZN
Dianthus caryophyllus L. · Carnation
Hilverda Kooij B.V.
Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium
GUILLOU JACQUES| Jacques Guillou / GUILLOU MAURICE| Maurice Guillou / GUILLOU BERNARD| Bernard Guillou
Dianthus L. · Carnation
Siegfried KLEMM (DE)
Rosa L. · Rose
Iris Helga Hetzel
Gerbera L. · Gerbera
EVELEENS JAN| Jan Eveleens
Dianthus caryophyllus L. · Carnation
Hilverda Kooij B.V.
Dianthus L. · Carnation
Flavio Michele Sapia (IT)
Dianthus caryophyllus L. · Carnation
F.SAPIA
Chrysanthemum L. · Chrysanthemum
VENTURO ROBERTA
Rosa L. · Rose
Poulsen Roser A/S
Chrysanthemum L. · Chrysanthemum
PIETERS LUC
Tulipa L. · Tulip
J.W.A. van der Wereld
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
SCHUMANN INGEBORG
Gerbera L. · Gerbera
Gartenbaubetrieb Wolfgang Bock
Rosa L. · Rose
KORDES' SOEHNE| W. Kordes' Soehne Rosenschulen GmbH & Co KG
Kalanchoe Adans. · Kalanchoe
NORBERT BULL