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Polska Bibliografia Naukowa

Issue 12 (6) 2013 pp. 57–66

Maria Tendaj, Barbara Mysiak

The effect of summer seedling planting dates on the development of seed stalks in shallot (Allium cepa L. var. ascalonicum Backer)

Abstract: Up-to-date production of shallots for commercial purposes was limited due to low supply of the seeding material as well as no breeding cultivars that would produce seeds. Local populations commonly grown in various countries are reproduced mainly in vegetative way, because they usually do not produce generative shoots nor seeds, or they are formed, but in a very reduced number. The aim of this study, conducted in the period 2009–2012, was to evaluate generative growth and seed production in shallot grown from seedlings planted in summer at different dates, without producing mother bulbs. The study included 4 shallot cultivars – ‘Toto’, ‘Ambition F1’, ‘Bonilla F1’, and ‘Matador F`1’. Seedlings (4 weeks old) were planted in the field on three dates – 3rd decade of July, 1st decade of August, and 3rd decade of August. In the second year of cultivation, after the plants had overwintered in the ground, losses in plants, the percentage of plants producing seed stalks and some traits of these stalks as well as seed yield in the true breeding cultivar ‘Toto’ were determined. Plants of the other cultivars were not allowed to produce seeds (inflorescence umbels were topped before flower opening), since these were hybrids and undesired cross-breeding could occur. The study showed that overwintering losses in plants were on average 26.3%, but they were the lowest in cv. ‘Toto’, in particular among plants obtained from the first date of planting seedlings. Irrespective of the cultivar, the largest amount of plants with developed seed stalks and with their highest number per plant were recorded in the treatments where the first planting date was used. A delay in planting seedlings in the first year of cultivation by 2–4 weeks had a significant effect on reducing the percentage of plants developing seed stalks in the second year, while in cv. ‘Toto” it resulted in a very high decrease in seed yield.
pub/12_6_57.pdf Full text available in Adobe Acrobat format:
http://www.hortorumcultus.actapol.net/volume12/issue6/12_6_57.pdf
Keywords: shallot cultivars, characteristics of seed stalks, seed yield

For citation:

MLA Tendaj, Maria, and Barbara Mysiak. "The effect of summer seedling planting dates on the development of seed stalks in shallot (Allium cepa L. var. ascalonicum Backer)." Acta Sci.Pol. Hortorum Cultus 12.6 (2013): 12.
APA Tendaj, M., & Mysiak, B. (2013). The effect of summer seedling planting dates on the development of seed stalks in shallot (Allium cepa L. var. ascalonicum Backer). Acta Sci.Pol. Hortorum Cultus 12 (6), 12.
ISO 690 TENDAJ, Maria, MYSIAK, Barbara. The effect of summer seedling planting dates on the development of seed stalks in shallot (Allium cepa L. var. ascalonicum Backer). Acta Sci.Pol. Hortorum Cultus, 2013, 12.6: 12.
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Streszczenie w języku polskim:
http://www.hortorumcultus.actapol.net/tom12/zeszyt6/abstrakt-57.html