The field and laboratory study of the collection samples of onion breed Allium cepa L.
Keywords:sample, Allium cepa L., bulb onion, morphological and biometric characteristics, essential oils, the parameters of the stomata of the leaves
Thirteen collection samples of Allium cepa L. of different ecology-geographical origin grown in the Crimea conditions are given. Morphometric characteristics of the bulbs - the form index, the diameter, the height, the weight, the thickness and the quantity of rich skins are analyzed. The greatest output of standart production (90 - 95.6%) was observed for all breeds. The biochemical values of the Allium cepa L. samples under study were examined by the traditional methods. It is marked that the dry substances, the sugars sum, the mono- and disaccharides in the majority of the samples exceed the standart (Yaltinsky rubin) on 14 - 39%, 11 - 48% and 36 - 150% correspondently. The samples with the high concentration of essential oil are singled out: Yaltinsky rubin (Crimea), Tavrichesky (Crimea), Blood red flat (Netherlands) and Brown Beauty (USA) - 4.5, 6.2, 5.6 and 4.4% correspondently. The microsculpture of Allium cepa L. leaf was studied by the method of raster electron mi-croscopy and the essential breed differences of the stomata quantity and their arrangement towards the leaf level were distinguished. The results of electron-microscopic research indicate the different level of Allium cepa L. samples adaptability. Allium cepa L. samples under study of the southern subspecies are recommended for the development of the new breeds with the advanced nutritional qualities.
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