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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.

Robelja

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Philomene

Active

Allium porrum L. · Leek

DE
2 records

Ribery

Active

Allium fistulosum L. · Welsh onion

HU
2 records

Scaldis

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Redspark

Active

Allium cepa L. var. cepa · Onion

NL
2 records

Pride

Active

Allium fistulosum L. · Welsh onion

NL
3 records

Rodrigo

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Romy

Active

Foeniculum vulgare Mill. · Fennel

IT
2 records

Robekkie

Terminated

Lachenalia Jacq. f. ex Murr. · Cape Cowslip

NL
2 records

Rolene

Terminated

Lachenalia Jacq. f. ex Murr. · Cape Cowslip

NL
2 records

Odrín

Active

Allium porrum L. · Leek

CZ
2 records

Obelisk

Terminated

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

NL
2 records

Red Sky

Active

Allium cepa L. var. cepa · Onion

NL
3 records

Red Queen

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Red Pearl

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

Red Hunter

Active

Allium cepa L. var. cepa · Onion

NL
3 records

Prisma

Terminated

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

NL
2 records

Quattro

Terminated

Allium cepa L. var. cepa · Onion

NL
2 records

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