Savory populations evaluated in this graduation thesis, originated from seeds collected from various wild growing populations in Slovenia. They were multiplied and transplanted to The Laboratory field of Biotechnical Faculty of University of Ljubljana with the aim of assessing the natural variations in essential oil content, and morphological characteristics of above ground plant parts among different populations and species. The variability was investigated on eight accessions of savory (Satureja spp.), one accession of Satureja subspicata Bartl. ex Vis.. And one accession of winter savory (Satureja montana L.). The essential oil content was determinated obtained by three hour water distillation with Clevenger apparatus. Due to nonexistence of morphological descriptors, the following parameters were defined: shrub length and height, stem shoot density, leaf and stem colour, width of inflorescence, flower petals colour, blooming percentage, gland density, plant grow habit and the possible presence of disease symptoms. Comparison of studied accessions showed following results: Satureja subspicata Bartl. ex Vis. significantly differs from savory and winter savory by flower petal colour. Satureja subspicata Bartl. ex Vis. and winter savory differ from savory by plant growth habitus. An inter- and intra- population as well as intraspecies variability were observed regarding blooming percentage. In 2017 the plants flowered from July to beginning of September. In 2018, on the other hand they flowered from July to late September. After drying, all accessions lost half of their weight. Essential oil content ranged from 0,47 to 21,19 mL/kg of dried mass.
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