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.

Pachafvel

Active

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

Hofmann Christa|Radeburg, DE

2 records

OHMADSAOM

Withdrawn

Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy

Andrew Bernuetz

2 records

Notwoodthree

Active

Hibiscus syriacus L. · Rose of Sharon

Woods Roderick

2 records

PEQZ0004

Active

hybrids between Pelargonium peltatum and Pelargonium zonale · Ivy-leaved geranium

Syngenta Flowers LLC

2 records

NOA195097

Active

Rosa L. · Rose

Reinhard Noack

2 records

Montana

Active

Dahlia Cav. · Dahlia

Johanna G.H. van Haaster

2 records

NWK 1065

Active

Hippeastrum Herb. · Amaryllis

TON PETER VAN NIEUWKERK

2 records

Nicole

Terminated

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Knud Jepsen A/S

2 records

Peardrop

Active

Begonia x tuberhybrida Voss · Tuberous begonia

Dennis Need

3 records

Pearl Mountain

Active

Tulipa L. · Tulip

Hybris B.V.

2 records

Olivia

Active

Schlumbergera Lem. · Schlumbergera

Gartneriet Thoruplund A/S

2 records

Passion

Active

Dianthus x allwoodii hort. · Allwood pink

Carolyn Grace Bourne

2 records

Mon Amour

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

J.W.P. Kolk Bloemen B.V.

2 records

PEQZ0086

Protection expired

hybrids between Pelargonium peltatum and Pelargonium zonale · Ivy-leaved geranium

Syngenta Seeds B.V.

2 records

PEQZ0028

Active

hybrids between Pelargonium peltatum and Pelargonium zonale · Ivy-leaved geranium

Syngenta Participations AG

2 records

PEQZ0007

Terminated

hybrids between Pelargonium peltatum and Pelargonium zonale · Ivy-leaved geranium

Syngenta Flowers LLC

2 records

PEPZ0002

Terminated

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

Syngenta Participations AG

2 records

MINBEL252

Active

Echinacea purpurea x Echinacea tennesseensis

Henricus Maria Joseph Holtmaat

2 records

Meimasula

Active

Rosa L. · Rose

Meilland Alain A.

3 records

Meilehagan

Active

Rosa L. · Rose

MEILLAND ALAIN ANTOINE

2 records

Meitincel

Application submitted

Rosa L. · Rose

MR ALAIN MEILLAND

2 records

Meiroylear

Active

Rosa L. · Rose

Meilland Alain A.|Antibes, FR

2 records

Merel

Active

Delphinium L. · Larkspur

Wilhelmus Franciscus van Veen

3 records

Meiptorius

Active

Rosa L. · Rose

Alain Antoine Meilland

2 records

1 2 ... 122 123 124 125 126 127 128 ... 253 254 Next

Jump to page 25 36 73 109 115 135 145 181 218 225

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

All terms →

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.