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.

Virgins

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Petrus Hendricus Oudolf

1 record

Xiezuo

Active

hybrids between Camellia azalea C. F. Wei and Camellia japonica L.

Liu Xinkai^^^Zhao Qiangmin^^^Gao Jiyin

1 record

Triky White

Terminated

Chrysanthemum L. · Chrysanthemum

PARATY B.V.B.A

1 record

WP08 UNI02

Terminated

Dianthus x allwoodii hort. · Allwood pink

Carolyn Grace Bourne

1 record

Zafrevivre

Active

Freesia Eckl. ex Klatt · Freesia

Van Zanten Breeding B.V.

1 record

TAN98192

Terminated

Rosa L. · Rose

Hans-Juergen Evers

1 record

TAN97139

Terminated

Rosa L. · Rose

Hans-Juergen Evers

1 record

Tomer Light Yellow

Withdrawn

Ranunculus asiaticus L. · Persian buttercup

UMIEL NAKDIMON^^^HAGILADI AMIR^^^REZNIK NATALI

1 record

TAN14695

Active

Rosa L. · Rose

CHRISTIAN EVERS

1 record

TAN10898

Active

Rosa L. · Rose

CHRISTIAN EVERS

1 record

TNGEUPP

Active

Geum coccineum Sm.

HARINI KORLIPARA

1 record

Yellow Summer

Terminated

Kalanchoe blossfeldiana Poelln. · Flaming Katy

Stefanus J. Slijkerman

1 record

Tika Sunrise

Active

Hippeastrum Herb. · Amaryllis

Agro Floral Peru S.A.C

1 record

Tika Princess

Active

Hippeastrum Herb. · Amaryllis

Agro Floral Peru S.A.C

1 record

Tigra

Terminated

Rhododendron simsii Planch. · Indica azalea

L.J. van der Meer B.V.

1 record

Tika Fairy

Active

Hippeastrum Herb. · Amaryllis

Agro Floral Peru S.A.C

1 record

Tieton

Terminated

Prunus avium (L.) L. · Sweet cherry

Washington State University Research Foundation

1 record

Warm Yoigloo

Terminated

Chrysanthemum L. · Chrysanthemum

Mark A. Smith

1 record

Synjac Perl

Withdrawn

Chrysanthemum L. · Chrysanthemum

Mark A. Smith

1 record

Symild Yel

Terminated

Chrysanthemum L. · Chrysanthemum

Mark A. Smith

1 record

Vino

Terminated

Dianthus L. · Carnation

P.Kooij & Zonen B.V.

1 record

Van Gogh

Withdrawn

Hibiscus syriacus L. · Rose of Sharon

Boomkwekerij Toon van Aert B.V.

1 record

VALDA ISOLD

Terminated

Dianthus x allwoodii hort. · Allwood pink

Carolyn Grace Bourne

1 record

Tori

Terminated

Kalanchoe Adans. · Kalanchoe

Knud Jepsen A/S

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.