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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.

Lonaveiro

Terminated

Dianthus caryophyllus L. · Carnation

Barberet & Blanc S.A.

1 record

Meifancy

Terminated

Rosa L. · Rose

Alain Antoine Meilland

1 record

Meisazy

Terminated

Rosa L. · Rose

Alain Antoine Meilland

1 record

Meirvingaye

Terminated

Rosa L. · Rose

Alain Antoine Meilland

1 record

MACGEU004

Active

Geum quellyon Sweet

ALASDAIR MACGREGOR|ELIZABETH MACGREGOR

1 record

Meimilarn

Terminated

Rosa L. · Rose

Alain Antoine Meilland

1 record

Morning Yellow

Terminated

Clematis L. · Clematis

Robinson Charles Mitchell , Lorna Mildred Mitchell

1 record

Molfetta Orange

Terminated

Chrysanthemum L. · Chrysanthemum

PARATY B.V.B.A

1 record

Noecfour

Terminated

Echinacea Moench. · Coneflower

Marco van Noort Breeding B.V.

1 record

Miss Moon

Terminated

Begonia x tuberhybrida Voss · Tuberous begonia

Ingvoldstad Gartneri

1 record

Miss Lilly

Terminated

Rhododendron simsii Planch. · Indica azalea

Eleonore Dettmer und Peter Dettmer als GbR

1 record

NOA71610

Active

Rosa L. · Rose

Reinhard Noack

1 record

NOA140702

Terminated

Rosa L. · Rose

Verdia S.A.R.L.

1 record

NOA11830

Application submitted

Rosa L. · Rose

Reinhard Noack

1 record

Minpopink05

Active

Dasiphora fruticosa (L.) Rydb. subsp. fruticosa · Shrubby cinquefoil

Hortival Diffusion S.A.S.

1 record

Minkarl

Terminated

Syringa vulgaris L. · Common lilac

Bernard Fourrier

1 record

Milla White

Active

Matthiola incana (L.) R. Br. · Hoary stock

Evanthia B.V.

1 record

NIRPAYBLA

Terminated

Rosa L. · Rose

Alessandro Ghione

1 record

New Picasso

Terminated

Dianthus caryophyllus L. · Carnation

Barberet & Blanc S.A.

1 record

Leskovo Dream

Application submitted

Hydrangea paniculata Siebold · Panicled hydrangea

Tatiana Smirnova

1 record

KRSWEYE01

Active

Begonia x hiemalis Fotsch · Elatior Begonia

LUBBERTUS H.KOPPE

1 record

Meilobiss

Terminated

Rosa L. · Rose

Alain Antoine Meilland

1 record

Lucky One

Active

Lilium L. · Lily

Van Zanten Flowerbulbs B.V

1 record

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