Variety traits

Bulb

The bulb is a storage organ of the plant that determines the commercial value of a cultivar through a combination of morphological and biological characteristics. It is evaluated by mass, number of bulbs per cluster, number of growing points, shape, and qualitative indicators of keeping quality and…

Mentioned in descriptions 7 519 varieties reference book.

The bulb is a storage organ of the plant, the parameters of which are key varietal traits when assessing crop marketability. The main morphological characteristics include bulb mass, its shape, defined as the ratio of height to diameter, as well as the color of dry and succulent scales and neck thickness. Important biological indicators are the number of bulbs per cluster, which characterizes the ability to form several bulbs from a single basal plate, and the number of growing points, which reflects the number of buds.

Evaluation of these traits during variety testing is carried out through biometric analysis, laboratory determination of sugar and dry matter content, and the study of keeping quality and taste. Bulb mass and shape depend directly on agronomic conditions: planting density, cultivation method, and availability of mineral nutrients. Bulb uniformity in size is an important advantage, as it facilitates the mechanization of harvesting and pre-sale preparation processes.

Cultivar resistance and productivity are predetermined by genetically fixed features of the number of growing points and the number of bulbs per cluster. For bulb onion varieties, a low number of bulbs per cluster is preferred, which allows for obtaining large marketable produce, whereas a high number of bulbs per cluster is characteristic of certain species, for example, shallots. Bulb quality also includes its ability to retain commercial appearance during storage, which is assessed during special tests for resistance to rot and general keeping quality.

Sources10

Breakdown by crop

Bulb — Onion 691 Bulb — Onion 508 Lily bulb 216 Tulip bulb 185 Garlic bulb 157 Hippeastrum bulb 144 Gladiolus corm 119 Shallot Bulb 72 Leek bulb 54 Bulb — Welsh onion 41 Fennel leaf base thickening 33 Freesia corm 21 Fritillaria bulb 14 Iris bulb 11 Shallot bulb 10 Lachenalia bulb 8 Zantedeschia tuber 8 Narcissus bulb 7 Hyacinthus orientalis bulb 7 Muscari bulb 6 Ornamental Allium Bulb 6 Eucomis l'Her. bulb 5 Crocus corm 4 Corm — Crocosmia 4

Found in these crops

Onion 698 Onion 512 Lily 238 Tulip 209 Garlic 180 Amaryllis 146 Gladiolus 128 Fennel 102 Shallot 74 Leek 64 Welsh onion 41 Iris 36

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.

De Lescure

Terminated

Allium cepa L. var. cepa · Onion

Domaine Public (FR)

2 records

Double Dutch Quartz

Active

Lilium L. · Lily

De Looff World Breeding B.V.

1 record

Double Snow

Active

Lilium L. · Lily

De Looff World Breeding B.V.

1 record

Doryan

Active

Allium cepa L. · Onion

UNITED GENETICS SEEDS CO

1 record

Double Dutch Venus

Application submitted

Lilium L. · Lily

De Looff World Breeding B.V.

1 record

Don Double

Withdrawn

Tulipa L. · Tulip

Vof Rotteveel Burgerbrug

1 record

Damascus F1

Terminated

Allium cepa L. · Onion

Scott Hendricks

2 records

DARCO

Active

Allium cepa L. · Onion

Jaap Reus

1 record

Dobrodii

Terminated

Allium sativum L. · Garlic

Kapustina Liudmyla Ivanivna, Horkutsenko Oleksandr Vasyl`ovych, Fokt Eduard Adol`fovych, Nedialkova Iiuliia Antonivna,

2 records

Dark Soul

Active

Tulipa L. · Tulip

G. Buis Bloembollen B.V.

1 record

Darwiruby

Terminated

Tulipa L. · Tulip

Haaster Flowerbulbs

1 record

Darika

Withdrawn

Allium cepa L. · Onion

ISI SEMENTI SPA

1 record

Derby F1

Terminated

Allium cepa L. · Onion

Ger Bimsdeboer

1 record

De Valence

Terminated

Allium cepa L. var. cepa · Onion

Domaine Public (FR)

1 record

DEPOCU

Terminated

Allium cepa L. · Onion

Burak Ozkale

1 record

Coral Flame

Active

Hippeastrum Herb. · Amaryllis

Penning Breeding B.V.

1 record

Commotion

Active

Lilium L. · Lily

Mak Breeding B.V.

1 record

De Huy

Terminated

Allium cepa L. var. cepa · Onion

Domaine Public (FR)

1 record

De Buzau

Active

Allium cepa L. · Onion

BEBEA PETRUTABURNICHI FLOAREAGHEORGHE FLORICA

2 records

Colour Mistic

Active

Tulipa L. · Tulip

Maveridge International B.V.

1 record

Corsini

Active

Lilium L. · Lily

World Breeding B.V

1 record

Corrado F1

Withdrawn

Allium cepa L. · Onion

Willem van Haerke

2 records

COPPER BALL

Active

Allium cepa L. · Onion

UNITED GENETICS SEEDS CO

2 records

Daryka

Active

Allium cepa L. · Onion

MAURIZIO BACCHI

2 records

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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.