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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.

White Wing

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Vulcan

Active

Foeniculum vulgare Mill. · Fennel

NL
3 records

Tarly

Active

Allium sativum L. · Garlic

CZ
3 records

Vertus

Active

Allium cepa L. · Onion

IT
2 records

Tripoli

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Vekan

Active

Allium sativum L. · Garlic

CZ
3 records

Winteria

Active

Allium cepa L. var. cepa · Onion

CZ
2 records

White Knight

Terminated

Allium cepa L. var. cepa · Onion

ES
2 records

Turopoljski

Active

Allium cepa L. var. cepa · Onion

HR
3 records

Viking

Terminated

Allium cepa L. var. cepa · Onion

NL
3 records

Spring Slim

Active

Allium fistulosum L. · Welsh onion

NL
2 records

Triton

Active

Foeniculum vulgare Mill. · Fennel

NL
3 records

Soroksari

Protection expired

Foeniculum vulgare Mill. · Fennel

HU
3 records

Virgin

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Skalka

Active

Allium sativum L. · Garlic

CZ
2 records

Šokac

Active

Allium sativum L. · Garlic

HR
2 records

Venus

Terminated

Cyrtanthus Aiton · Fire Lily

NL
2 records

Vekan II

Active

Allium sativum L. · Garlic

CZ
2 records

Ulisse

Active

Foeniculum vulgare Mill. · Fennel

HU
2 records

Schelia

Active

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

CZ
2 records

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