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.

SV4522NB

Active

Allium fistulosum L. · Welsh onion

Bayer Holland B.V.

4 records

Telstar

Protection expired

Iris L. · Iris

Hommes B.V.

2 records

SV7030NS

Active

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

4 records

SV4053NU

Active

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

3 records

SV3557ND

Active

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

2 records

Sweet Magnolia

Active

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

2 records

Sunny Robyn

Active

Lilium L. · Lily

Mak Niels Johannes Cornelis

2 records

Tacana

Active

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

3 records

SV4043NM

Active

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

2 records

Sumatra

Terminated

Hippeastrum Herb. · Amaryllis

Ben van Geest

2 records

Sweet Tule

Active

Allium cepa L. var. cepa · Onion

Bejo Zaden B.V., De Groot en Slot B.V.

3 records

Summer Island

Active

Allium fistulosum L. · Welsh onion

TOZER SEEDS LTD

2 records

Storo

Application submitted

Allium cepa L. var. cepa · Onion

Hazera Seeds B.V.

3 records

Sumatra

Active

Allium cepa L. var. cepa · Onion

PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.

2 records

Sultop

Active

Allium sativum L. · Garlic

Top Semence (FR)/Institut National de la Recherche Agronomique (FR)

3 records

SV2657NK

Terminated

Allium cepa L. var. cepa · Onion

Bayer Holland B.V.

3 records

Stratus

Active

Allium cepa L. var. cepa · Onion

SEMINIS INC

2 records

Soplica

Active

Allium cepa L. var. cepa · Onion

PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.

3 records

Sprint

Active

Allium sativum L. · Garlic

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

3 records

Splendid

Terminated

Allium porrum L. · Leek

J.E. OHLSENS ENKE A/S

2 records

Snowboard

Active

Tulipa L. · Tulip

J.A.Borst Bloembollen B.V.

2 records

Spartaco

Active

Foeniculum vulgare Mill. · Fennel

Clause Tezier, FR

2 records

Sparkler

Protection expired

Gladiolus L. · Gladiolus

Testcentrum voor Siergewassen B.V.

2 records

Sirente

Active

Foeniculum vulgare Mill. · Fennel

Monsanto Vegetable IP Management B.V.

4 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.