Juvenility and bolting in shallot (<i>Allium cepa</i>L. var.<i>ascalonicum</i>Backer)

The aim of this study, conducted in the years 2010–2012, was to evaluate bolting and seed production of shallot depending on storage temperature of steckling bulbs with different diameters. The present study included 4 cultivars (‘Toto’, ‘Ambition F₁’, ‘Bonilla F₁’, and ‘Matador F₁’) and one local population (‘U’). Bulbs with the following diameters: 20–30 mm, 31–40 mm, 41–50 mm, and 51–60 mm, were stored from the first 10-day period of November (2010 and 2011) until the end of March (2011 and 2012) at a temperature of 0–1 ^oC, 4–6 ^oC, and 8–10 ^oC. After they were planted in the field (the second 10-day period of April), observations of bolting were carried out, while the weight of seed umbels and seed yield were determined only for the cultivar ‘Toto’ and the population ‘U’. The storage temperature of steckling bulbs in the range of 4–6 ^oC and 8–10 ^oC was most conducive to bolting, in particular in plants grown from large bulbs with a diameter above 40 mm. In the cultivar ‘Toto’, plants from bulbs with a diameter above 40 mm and stored at a temperature of 4–6 ^oC were characterized by the highest weight of seed umbels. This had an effect on obtaining the highest seed yield (on average 1604.16-2300.7 g per 100 m² of area). Shallot plants from the population ‘U’ grown from bulbs with a diameter of 20–30 mm were characterized by a distinctly lower percentage of bolting plants compared to the cultivars studied. For this reason, this population does not promise positive effects in shallot production for seed

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Juvenility and bolting in shallot (Allium cepaL. var.ascalonicumBacker)

Cited by 3 publications

References 25 publications

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Development of seed propagated shallot (Allium cepa L var. aggregatum) varieties in Ethiopia

Effect of Screening of Onion (Allium cepa) Ecotypes of Southern Iran on Bulb Yield and Bolting

The effect of storage temperature of steckling bulbs on seed stalk development and seed yield of shallot (Allium cepa L. var. ascalonicum Backer)

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