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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.

Rote Laaer

Active

Allium cepa L. · Onion

Bauernsaat p.A. Johann Peitl

AT
1 record

Rock Fire

Active

Tulipa L. · Tulip

Maveridge Licensing B.V.

NL
1 record

Rouge foncé

Active

Allium cepa L. var. cepa · Onion

Domaine Public (FR)

FR
1 record

Rolander

Protection expired

Allium cepa L. · Onion

SPERLING| Carl Sperling & Co. (GmbH & Co. KG)

DE
1 record

Rio corona

Withdrawn

Allium cepa L. var. cepa · Onion

Rio Colorado Seeds Inc. (US)

FR
1 record

Rocardo

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

NL
1 record

RINO

Terminated

Allium cepa L. var. cepa · Onion

ZETA SEEDS S.L.

ES
1 record

Rigoletto

Active

Gladiolus L. · Gladiolus

Firma K. en K. Gootjes

NL
1 record

Roadrunner

Active

Tulipa L. · Tulip

G. Buis Bloembollen B.V.

NL
1 record

Rio Dulce

Withdrawn

Allium cepa L. var. cepa · Onion

Rio Colorado Seeds Inc. (US)

FR
1 record

Rosalie

Active

Allium cepa L. var. cepa · Onion

Hoza Zaden B.V.

NL
1 record

ROMAGUI

Withdrawn

Allium cepa L. var. cepa · Onion

PETOSEED CO

ES
1 record

Red Orb

Withdrawn

Allium cepa L. var. cepa · Onion

Magnus Kahl Seeds Pty Ltd

NL
1 record

Rojo

Terminated

Allium cepa L. · Onion

SUNSEEDS

IT
1 record

RICH

Active

Allium cepa L. · Onion

Javier Sanchez

UA
2 records

Reload

Active

Lilium L. · Lily

Mak Breeding Rights B.V.

NL
1 record

Red Halen

Application submitted

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

NL
1 record

ROC

Withdrawn

Allium cepa L. var. cepa · Onion

SEMILLAS BATLLE, S.A.

ES
1 record

Red Spider

Active

Tulipa L. · Tulip

Vertuco B.V.

NL
1 record

Red Planet

Active

Lilium L. · Lily

Bisschoff Tulleken B.V.

NL
1 record

Red Sun

Active

Allium cepa L. var. aggregatum G. Don · Shallot

SJALOTTENKWEKERIJ "DE VOETAKKER" B.V.

NL
2 records

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