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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.

White Illusion

Active

Tulipa L. · Tulip

Bloembollenkwekerij Firma Veul V.O.F.

1 record

Supernova

Application submitted

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Slijkerman Breeding B.V.

1 record

Ultima

Terminated

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

1 record

Weslupe

Terminated

Dianthus caryophyllus L. · Carnation

West Select B.V.

1 record

TAN19136

Application submitted

Rosa L. · Rose

CHRISTIAN EVERS

1 record

TAN16576

Active

Rosa L. · Rose

CHRISTIAN EVERS

1 record

TAN14833

Active

Rosa L. · Rose

CHRISTIAN EVERS

1 record

TAN12638

Active

Rosa L. · Rose

CHRISTIAN EVERS

1 record

Tika Queen

Active

Hippeastrum Herb. · Amaryllis

Agro Floral Peru S.A.C

1 record

Tika Glory

Withdrawn

Hippeastrum Herb. · Amaryllis

Agro Floral Peru S.A.C

2 records

VPRU 17/49

Active

Rudbeckia hirta L. · Black-eyed Susan

CHARLES VALIN

1 record

TAN13621

Active

Rosa L. · Rose

CHRISTIAN EVERS

1 record

TAN00641

Terminated

Rosa L. · Rose

Hans-Juergen Evers

1 record

Sunflor Rubato

Terminated

Dianthus L. · Carnation

P.Kooij & Zonen B.V.

1 record

Viana

Active

Dianthus caryophyllus L. · Carnation

P.Kooij & Zonen B.V.

1 record

TAN08736

Withdrawn

Rosa L. · Rose

CHRISTIAN EVERS

1 record

Tika Star

Active

Hippeastrum Herb. · Amaryllis

Agro Floral Peru S.A.C

1 record

Tika Imperator

Active

Hippeastrum Herb. · Amaryllis

Agro Floral Peru S.A.C

1 record

Supreme Canteloupe

Active

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

HARINI KORLIPARA

1 record

Stromboli

Active

Camellia japonica L. · Japanese camellia

A. Stervinou S.A.R.L.

1 record

TOSPRESORA

Active

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

Floha V.O.F

1 record

Teclib

Withdrawn

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

GERAFLOR

1 record

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