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.

Pink Delight

Active

Tulipa L. · Tulip

Testcentrum voor Siergewassen B.V.

1 record

Pink Blossom

Active

Lilium L. · Lily

Laan Flora Facilities B.V.

1 record

PINK GIN

Terminated

Chrysanthemum indicum L. · Indian chrysanthemum

MACHIN BARRIE JOHN (GB)

1 record

Pontiac

Active

Tulipa L. · Tulip

Future Rights B.V

1 record

Pom Pom Rose

Active

Narcissus L. · Daffodil

Brian S. Duncan

1 record

Pomaranchevyi

Terminated

Chaenomeles japonica (Thunb.) Lindl. ex Spach · Japanese quince

Nedvyha Oleh Mykolaiovych, Klymenko Svitlana Valentynivna,

1 record

Pink Foxtrot

Active

Tulipa L. · Tulip

Vertuco B.V.

2 records

Phantasio

Active

Triteleia laxa Benth. · Ithuriel's-spear

V.O.F. A.J. van den Berg Flower Power

1 record

Pille

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

1 record

Polka

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich

1 record

Polder Pink

Active

Tulipa L. · Tulip

Vertuco B.V.

1 record

Polaris

Application submitted

Clematis L. · Clematis

Szczepan Marczyński

1 record

Pink Symphony

Active

Hippeastrum Herb. · Amaryllis

Penning Breeding B.V.

1 record

Perła Smolic

Terminated

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

Hodowla i Nasiennictwo Roślin Ogrodniczych Waganiec sp. z o.o.

1 record

Pinksize

Active

Tulipa L. · Tulip

C.Th. Ammerlaan en Zn. B.V.

1 record

PBS Pinky Gardy

Active

Chrysanthemum x morifolium Ramat. · Florist's daisy

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich

1 record

Petite Yellow GOF

Terminated

Tagetes patula L. · French marigold

PlantiCo Hodowla i Nasiennictwo Ogrodnicze Golebiew sp. z o.o.

1 record

Perth

Active

Tulipa L. · Tulip

Vertuco B.V.

1 record

Paularo

Terminated

Chrysanthemum x morifolium Ramat. · Florist's daisy

PARATY B.V.B.A

1 record

PENVE

Terminated

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

Hofmann Christa

1 record

PEACHY YOLYNN

Terminated

Chrysanthemum indicum L. · Indian chrysanthemum

Leon GLICENSTEIN (US)

1 record

Paint it Black

Active

Tulipa L. · Tulip

Vertuco B.V.

1 record

PATRICK MIOULANE

Withdrawn

Rosa L. · Rose

Dominique CROIX-RANCHON & Jacques RANCHON (FR)

1 record

Pamplona

Active

Tulipa L. · Tulip

Fa. A. en L. Duin

1 record

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Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.