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.
Saintpaulia ionantha H. Wendl. · African violet
Fischer, Arnold W.|Hanover, Federal Republic of Germany
Clematis L. · Clematis
Szczepan Marczyński
Clematis L. · Clematis
Uno Kivistik, Aili Kivistik
Begonia x hiemalis Fotsch · Elatior Begonia
Begonien-Rieger Inh. Matthias Rohde
Zea mays L. subsp. mays (Maize Group) · Maize
PIONEER OVERSEAS CORPORATION
Rhododendron simsii Planch. · Indica azalea
Otto Stahnke und Frau Eleonore Dettmer (Gartenbaubetrieb)
Dianthus L. · Carnation
HANS JURGEN EVERS (T)
Zea mays L. subsp. mays (Maize Group) · Maize
Poljoprivredni Institut Osijek, HR
Rosa L. · Rose
W. Kordes Sohne Rosenschulen GmbH & Co KG| DE
Solanum lycopersicum L. · Tomato
Sakata Seed Corporation, JP
Dahlia Cav. · Dahlia
Dahli Trade B.V.
Zea mays L. subsp. mays (Maize Group) · Maize
Poljoprivredni Institut Osijek, HR
Dianthus L. · Carnation
HANS JURGEN EVERS (T)
Hippeastrum Herb. · Amaryllis
TON PETER VAN NIEUWKERK
Rosa L. · Rose
DE RUITER'S NIEUWE ROZEN B.V.
Chrysanthemum L. · Chrysanthemum
Johan David
Rosa L. · Rose
P. Orard
Rosa L. · Rose
P. Orard
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Chrysanthemum L. · Chrysanthemum
N.V. JOLU-PLANT
Calendula officinalis L. · Pot marigold
GONCEARIUC, Maria, MD / BALMUŞ, Zinaida, MD / JACOTĂ, Anatolie, MD / FLOREA, Vasile, MD
Triticum aestivum L. · Bread wheat
Balla Laszlo / Bedoe Zoltan / Lang Laszlo / Szunics Laszlo / Szunics Laszlone / Karsai Ildiko
Zea mays L. · Maize
Javier Betran
Dianthus caryophyllus L. · Carnation
M. C. V. STAAVEREN