Variety traits
Allium cepa L. var. cepa
The main economically valuable organ of the onion, assessed by morphometric traits: size, weight, density, and shape index, which influence storage quality and suitability for mechanical harvesting.
In the reference 691 varieties crop Onion, where this is mentioned in the description.
For onions, the bulb is the primary object of evaluation, where the key parameters are size, determined by the maximum transverse diameter, and weight. Bulb shape is classified into six types — from flat to elongated — and is quantitatively expressed by the shape index, which represents the ratio of height to diameter.
Important agronomic characteristics include density and maturity, determined by the condition of the dry outer scales and the dried neck. Breeding also considers the trait of bulbil formation (nesting), where varieties that form a single bulb from the basal plate are preferred for commercial cultivation.
Technological quality indicators of the bulb include storability, determined by varietal traits, and dry matter content, which is important for industrial processing. Uniformity of bulbs in shape and weight is a critical factor for the efficiency of mechanical harvesting and grading.
General information about the subject — on the page Bulb.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Allium cepa L. var. cepa · Onion
Bejo Zaden BV (NL)
Allium cepa L. var. cepa · Onion
Nickerson Zwaan B.V. (NL)
Allium cepa L. var. cepa · Onion
Seminis Vegetable Seeds
Allium cepa L. var. cepa · Onion
Seminis Vegetable Seeds
Allium cepa L. var. cepa · Onion
ISHIHARA SEED CO.LTD.
Allium cepa L. var. cepa · Onion
Allium cepa L. var. cepa · Onion
Takii & Company LTD (JP)
Allium cepa L. var. cepa · Onion
TAKII EUROPE B V
Allium cepa L. var. cepa · Onion
Texas Agricultural Experiment Station
Allium cepa L. var. cepa · Onion
Seminis Vegetable Seeds
Allium cepa L. var. cepa · Onion
NUNZA BV
Allium cepa L. var. cepa · Onion
O'CONNOR DAVID
Allium cepa L. var. cepa · Onion
Hazera Seeds B.V.
Allium cepa L. var. cepa · Onion
Bejo Zaden BV (NL)
Allium cepa L. var. cepa · Onion
Nickerson Zwaan B.V. (NL)
Allium cepa L. var. cepa · Onion
Syngenta Seeds B.V.
Allium cepa L. var. cepa · Onion
Bejo Zaden BV, NL-1749 ZH Warmenhuizen
Allium cepa L. var. cepa · Onion
Hazera Seeds B.V.
Allium cepa L. var. cepa · Onion
Kees Broersen Zaden
Allium cepa L. var. cepa · Onion
Semenarna Ljubljana, SI
Allium cepa L. var. cepa · Onion
Takii & Company Ltd
Allium cepa L. var. cepa · Onion
Takii & Company LTD (JP)
Allium cepa L. var. cepa · Onion
Przedsiebiorstwo Nasiennictwa Ogrodniczego i Szkolkarstwa w Ozarowie Mazowieckim Spolka z o.o.
Allium cepa L. var. cepa · Onion
Takii & Company Ltd