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.
Helianthus annuus L. · Sunflower
NOVARTIS SEEDS S.A.^^^INSTITUTE FOR WHEAT AND SUNFLOWER
Chrysanthemum L. · Chrysanthemum
Yoder Brothers Inc
Rosa L. · Rose
POULSEN ROSER A/S
Helianthus annuus L. · Sunflower
I.Ivanova, P. Petrov, P.Shindrova, V. Encheva, M. Hristov, G. Georgiev, Yu. Encheva, R. Efremova, P.Ivanov, A.Piskov,
Glycine max (L.) Merr. · Soybean
INSTITUTE OF FIELD AND VEGETABLE CROPS
Rosa L. · Rose
W. KORDES'SOHNE ROSENSCHULEN GMBH & CO KG
Dianthus L. · Carnation
Siegfried KLEMM (DE)
Rosa L. · Rose
MEILLAND STAR ROSE
Rosa L. · Rose
Wilhelm Kordes / Tim-Hermann Kordes / Margarita Kordes in Fa. W. Kordes' Söhne Rosenschulen GmbH & Co KG
Rosa L. · Rose
LAVER| Keith Laver c/o Springwood Consultants, Inc.
Rosa L. · Rose
Wilhelm Kordes / Tim-Hermann Kordes / Margarita Kordes in Fa. W. Kordes' Söhne Rosenschulen GmbH & Co KG
Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium
SCHUMANN| Ingeborg Schumann Lehr- und Versuchsanstalt fuer Gartenbau
Rosa L. · Rose
W.KORDES'SOHNE
Solanum tuberosum L. · Potato
J.A. CREBAS, R.M. SCHOUTEN-CREBAS
Chrysanthemum L. · Chrysanthemum
WALTER H. JESSEL, JR. & WILLIAM E. DUFFETT
Brassica napus var. napus · Rapeseed
MORTEN HELT POULSEN
Begonia L. · Begonia
M. KOPPE B.V
Rosa L. · Rose
Rosen-Tantau Mathias Tantau Nachfolger
Rosa L. · Rose
Hans-Jürgen Evers c/o Rosen Tantau KG
Rosa L. · Rose
Rosen-Tantau Mathias Tantau Nachfolger
Rosa L. · Rose
Poulsen Roser A/S
Rosa L. · Rose
Poulsen Roser A/S
Zea mays L. · Maize
PIONEER OVERSEAS CORPORATION
Rosa L. · Rose
Poulsen Roser A/S