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.
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
Martin Geibel c/o Elsner pac Jungpflanzen GbR
Rosa L. · Rose
Meilland Alain A.
Rosa L. · Rose
Wilhelm Kordes, W. Kordes' Sohne Rosenschulen GmbH & Co KG
Rosa L. · Rose
Wilhelm Kordes, W. Kordes' Sohne Rosenschulen GmbH & Co KG
Rosa L. · Rose
Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes
Rosa L. · Rose
Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes
Rosa L. · Rose
Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes
Dahlia Cav. · Dahlia
Verwer, Aad|Lisse, Netherlands
Rosa L. · Rose
The Limes New Roses
Dahlia Cav. · Dahlia
Verwer, Aad|Lisse, Netherlands
Dahlia Cav. · Dahlia
Verwer, Aad|Lisse, Netherlands
Dahlia Cav. · Dahlia
Verwer Aad
Dahlia Cav. · Dahlia
Verwer, Aad|Lisse, Netherlands
Dahlia Cav. · Dahlia
Verwer Aad
Bouvardia Salisb. · Bouvardia
DE JONG-VAN DER ELST, BEB WILLY ANNIE
Rosa L. · Rose
Pepinieres et Roseraies Georges Delbard| FR
Rosa L. · Rose
David J.C.Austin
Rubus idaeus L. · Red raspberry
The James Hutton Institute, Dundee, DD2 5DA
Delphinium L. · Larkspur
Coakley Tony|Blantyre, Glasgow G72 9BB, GB
Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy
Thomas Michael Cunneen
Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy
University of Sydney
Rosa L. · Rose
William RADLER
Begonia x hiemalis Fotsch · Elatior Begonia
LUBBERTUS H.KOPPE
Rosa L. · Rose
Poulsen Roser AS, DK - 3480 Fredensborg