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.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
SNOWFLAKE NURSERY (US)
Tulipa L. · Tulip
Lybo Veredeling
Lilium L. · Lily
Laan Flora Facilities B.V.
Tagetes patula L. · French marigold
Hodowla i Nasiennictwo Roślin Ogrodniczych Waganiec sp. z o.o.
Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium
SCHUMANN INGEBORG
Callistephus chinensis (L.) Nees · China aster
PlantiCo Hodowla i Nasiennictwo Ogrodnicze Szymanów Sp. z o.o.
Dahlia Cav. · Dahlia
Dongen
Matthiola incana (L.) R. Br. · Hoary stock
PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.
Gerbera jamesonii Bolus ex Hook. f. · Barberton daisy
Eveleens, Jan L.
Dahlia Cav. · Dahlia
Maatschap van der Linden en Zoon
Lilium L. · Lily
Rooijakkers Breezand B.V.
Rosa L. · Rose
Charles BROIZAT (FR)
Campanula L. · Bellflower
Alieksieienko Oksana Volodymyrivna, Vol`s`ka IUliana Oleksandrivna,
Tulipa L. · Tulip
Vertuco B.V.
Tulipa L. · Tulip
Gebr. Boon Hem B.V.
Paeonia L. · Peony
Horobets Vasyl Fedorovych
Prunus dulcis (Mill.) D. A. Webb · Almond
CITA- ARAGON
Begonia x hiemalis Fotsch · Elatior Begonia
KOPPE L.H.| L. H. Koppe
Tulipa L. · Tulip
G. Buis Bloembollen B.V.
Prunus cerasus L. · Sour cherry
The Regents of the University of California (US)
Tulipa L. · Tulip
Bola Tulpenveredeling
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Tulipa L. · Tulip
Vertuco B.V.
Tulipa L. · Tulip
Vertuco B.V.