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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.

Albina Plena

Active

Clematis L. · Clematis

Johnson, Magnus

SE
1 record

Albatros

Terminated

Lilium L. · Lily

Bisschoff Tulleken B.V.

NL
2 records

Anfield

Active

Tulipa L. · Tulip

Vertuco B.V.

NL
1 record

AMERICANA PINK

Terminated

Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium

GOLDSMITH SEEDS

DK
1 record

AMERICANA CORAL

Terminated

Pelargonium zonale (L.) L'Hér. · Horseshoe pelargonium

GOLDSMITH SEEDS

DK
1 record

ADARIFER

Active

Rosa L. · Rose

Michel Adam (FR)

FR
1 record

ADAFUCOMY

Terminated

Rosa L. · Rose

Michel Adam (FR)

FR
1 record

ADABOURGRUD

Withdrawn

Rosa L. · Rose

Michel Adam (FR)

FR
1 record

Aluston

Application submitted

Rosa L. · Rose

Klymenko Zinaida Kostiantynivna

UA
2 records

Allure

Application submitted

Freesia Eckl. ex Klatt · Freesia

Van den Bos Freesia B.V.

NL
1 record

Adele

Active

Freesia Eckl. ex Klatt · Freesia

P. Hofland B.V.

NL
1 record

Adal

Active

Rosa L. · Rose

Iuroaea Gheorghe

RO
2 records

05E2848

Terminated

Triticum durum Desf. · Durum wheat

Eurodur

ES
1 record

Zizzi Saron

Terminated

Rosa L. · Rose

Saron Breeding B.V.

1 record

Adonia

Terminated

Rhododendron simsii Planch. · Indica azalea

STAHNKE| Otto Stahnke (Gartenbaubetrieb)

DE
1 record

ZO12153

Terminated

Clematis L. · Clematis

J.VAN ZOEST BEHEER B.V.

1 record

Adasun21

Withdrawn

Helianthus annuus L. · Sunflower

EASTERN MEDITERRANEAN AGRICULTURAL RESEARCH INSTITUTE

IT
1 record

ADAROMAQ

Withdrawn

Rosa L. · Rose

Michel Adam (FR)

FR
1 record

ZO16170

Active

Clematis L. · Clematis

J.VAN ZOEST BEHEER B.V.

1 record

Yoheidi

Terminated

Chrysanthemum L. · Chrysanthemum

Mark A. Smith

1 record

Yogigi Pink

Terminated

Chrysanthemum L. · Chrysanthemum

PETER WAIN

1 record

Yadah Saron

Terminated

Rosa L. · Rose

Saron Breeding B.V.

1 record

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