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Variety traits

Double flowering / Reversion

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.

Sources6

Breakdown by crop

Rose Double-flowering 1 377 Tulip double flowering 375 Chrysanthemum double-flowering 344 Carnation Double Flowering 336 Double-flowered Lily 164 Carnation double-floweredness 163 Double-flowering — Pelargonium zonale 162 Gerbera double-flowering 142 Dahlia double-flowering 133 Double-flowering in Begonia elatior 90 Double-flowering in Hydrangea macrophylla 88 Double-flowering in Kalanchoe blossfeldiana 77 Pelargonium double flowering 73 Hippeastrum Double-flowering 68 Double-flowering — Pelargonium peltatum 64 Double-flowering in Garden Chrysanthemum 60 Clematis double flowering 59 Azalea double-flowering 56 Double flowers in Impatiens walleriana 54 Freesia double flowers 48 Kalanchoe double flowering 41 Rhododendron doubleness 38 Double-flowering — Tuberous Begonia 38 Double-flowering — Chrysanthemum indicum 32

Found in these crops

Rose 1 840 Tulip 404 Chrysanthemum 348 Carnation 347 Carnation 165 Horseshoe pelargonium 161 Lily 148 Dahlia 141 Gerbera 139 Almond 111 Bigleaf hydrangea 98 Elatior Begonia 88

Varieties that feature this in their description

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.

P1574

Active

Zea mays L. · Maize

PIONEER HI-BRED INTERNATIONAL

IT
4 records

Peggy

Active

Begonia x hiemalis Fotsch · Elatior Begonia

Josef Heuger

PL
4 records

Orville

Active

Lactuca sativa L. · Lettuce

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
9 records

NS Teona

Active

Glycine max (L.) Merr. · Soybean

Institut za ratarstvo i povrtarstvo, Novi Sad

RO
5 records

Pacpursyb

Active

Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium

Michalik Andrea|Dresden, DE

DE
4 records

NS Kaca

Active

Glycine max (L.) Merr. · Soybean

Institut za ratarstvo i povrtarstvo, Novi Sad, Srbija

SI
6 records

Natchez

Active

Rubus L. subg. Rubus · Blackberry

University of Arkansas, USA

UA
7 records

Monolit

Active

Brassica napus var. napus · Rapeseed

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
5 records

Moonbeam

Protection expired

Ornithogalum candicans (Baker) J.C. Manning & Goldblatt · Galtonia

STIDOLPH| Nora Stidolph / STIDOLPH DIANA| Diana Stidolph

DE
4 records

Meitongas

Active

Rosa L. · Rose

Alain Antoine Meilland

FR
4 records

Meifaissel

Active

Rosa L. · Rose

Meilland Alain A.|Antibes, FR

FR
4 records

Meidarin

Active

Rosa L. · Rose

Meilland International S.A.

FR
4 records

Meilmera

Active

Rosa L. · Rose

SNC Meilland & Cie

FR
5 records

Macnewye

Protection expired

Rosa L. · Rose

Samuel McGredy

FR
4 records

Lusaka

Active

Pisum sativum L. · Pea

Holland-Select Research B.V.

NL
7 records

Korkitoek

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

PL
4 records

Kortraste

Active

Rosa L. · Rose

Wilhelm Kordes, W. Kordes' Sohne Rosenschulen GmbH & Co KG

DE
4 records

Korpatetof

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

DE
4 records

Korkopapp

Active

Rosa L. · Rose

KOOPMANN| Gerhard Koopmann

DE
4 records

Kordaelf

Active

Rosa L. · Rose

Wilhelm Kordes, W. Kordes' Sohne Rosenschulen GmbH & Co KG

DE
4 records

Kleroder

Active

Pelargonium peltatum (L.) L'Hér. · Ivy-leaf geranium

Siegfried Klemm, Siegfried Klemm

PL
4 records

Karma Corona

Active

Dahlia Cav. · Dahlia

VERWER Aad W.M.

NL
4 records

Julie

Active

Begonia x hiemalis Fotsch · Elatior Begonia

MAN| J. Man

DE
4 records

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