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.
Dianthus caryophyllus L. · Carnation
JEAN LOUIS DESCLAUX
Rosa L. · Rose
R.G.JELLY
Rosa L. · Rose
Reiner Kordes c/o W. Kordes'Söhne Rosenschulen GmbH & Co KG / Werner Kordes c/o W. Kordes'Söhne Rosenschulen GmbH & Co KG / Wilhelm Kordes c/o W. Kordes'Söhne Rosenschulen GmbH & Co KG
Dianthus L. · Carnation
Siegfried KLEMM (DE)
Dianthus caryophyllus L. · Carnation
Siegfried Klemm
Rosa L. · Rose
R HARKNESS and CO LTD
Rosa L. · Rose
Karl Hetzel Rosenkulturen
Pelargonium L'Hér. ex Ait. · Geranium
JAQUES GUILLOU,BERNARD GUILLOU
Lactuca sativa L. · Lettuce
Jim Cervantes Flores
Pelargonium L'Hér. ex Ait. · Geranium
Ingeborg SCHUMANN (DE)
Brassica napus var. napus · Rapeseed
DR. WALTER WICHMANN & DR. HARDNAK GRAF VON DER SCHULENBURG
Malus domestica (Suckow) Borkh. · Apple
INSAD-Prusy sp. z o.o.
Prunus avium (L.) L. · Sweet cherry
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Marga Dümmen
Gerbera L. · Gerbera
Segers, Th A.|Hoofddorp, Netherlands
Hordeum vulgare L. · Barley
Florimond Desprez Veuve et Fils, FR
Rosa L. · Rose
DICKSON| Pat Dickson c/o Dickson Nurseries Limited
Brassica napus var. napus · Rapeseed
Monsanto Technology LLC, US
Rhododendron L. · Azalea
KARL GLASER
Brassica napus var. napus · Rapeseed
Ringot (FR)
Chrysanthemum L. · Chrysanthemum
Pieters, Dirk|Schierveldestraat 3A Oosnieuwkerke, 8840 Staden, Belgium
Dianthus L. · Carnation
SAPIA FLAVIO
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
HANES| Mitchell Eugene Hanes
Pisum sativum L. · Pea
PURE LINE SEEDS