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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.

Militsa

Active

Rosa x damascena Mill. · Damask rose

N. Kovacheva, S. Pata

BG
2 records

Marax Pride

Active

Tulipa L. · Tulip

Marax Tulips V.O.F.

NL
1 record

Mandarino

Terminated

Pelargonium grandiflorum (Andrews) Willd. · Regal pelargonium

VAVRA| Mirco Vavra

DE
1 record

MERIFLAME

Terminated

Pelargonium L'Hér. ex Ait. · Geranium

Adrianus W M Enthoven (NL)

FR
1 record

Meridonna

Active

Pelargonium graveolens L'Hér. · Rose geranium

ENTHOVEN ADRIANUS W.M.

IT
1 record

Marie José

Terminated

Tulipa L. · Tulip

Bentem Bloembollen

NL
1 record

Mariola

Active

Tulipa L. · Tulip

Savro B.V.

NL
1 record

Memm

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

EE
1 record

Mama Mia

Active

Tulipa L. · Tulip

Bentem Bloembollen

NL
1 record

Marcsika

Active

Rosa L. · Rose

Mark Gergely / Mark Gergelyne

HU
2 records

Merisweet

Active

Pelargonium graveolens L'Hér. · Rose geranium

ENTHOVEN ADRIANUS W.M.

IT
1 record

Meibeausi

Active

Rosa L. · Rose

MEILLAND ALAIN ANTOINE

IT
1 record

Maitresse

Active

Tulipa L. · Tulip

Lutjefleur Bloemisterij

NL
1 record

Malaga

Active

Hippeastrum Herb. · Amaryllis

Penning Breeding B.V.

NL
1 record

Magic Fire

Terminated

Rosa L. · Rose

KAUP| Dipl.-Ing. Herbert Kaup (Baumschule)

DE
1 record

Masai

Active

Dianthus L. · Carnation

NOBBIO GIACOMO

IT
1 record

MAIJA

Active

Rosa L. · Rose

Dzidra Rieksta

LV
1 record

MAUVASOL

Withdrawn

Rosa L. · Rose

Daniele Maulave (FR)

FR
1 record

Madison

Active

Narcissus L. · Daffodil

Leenen en Zoon

NL
1 record

MACARENA

Terminated

Dianthus caryophyllus L. · Carnation

LABOR.PHYSILOGIE VEGETAL

ES
1 record

Marshmallow

Active

Tulipa L. · Tulip

Huijg Breezand B.V.

NL
1 record

Martondur 1

Terminated

Triticum aestivum L. · Bread wheat

Szunics Laszlo / Balla Laszlo / Bedoe Zoltan / Lang Laszlo / Szunics Laszlone

HU
1 record

Marshmallow Baby

Active

Dahlia Cav. · Dahlia

Maatschap van der Linden en Zoon

NL
1 record

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