Variety trial was conducted in year 2012 at four locations in two growing areas of Slovenia on different soils (Rakičan - heavy soil, Murska Sobota - light soil, Savinja Valley - medium heavy and heavy soil). Six varieties of Camelina (Camelina sativa (L.) Crantz): Slovenian landrace variety, Vega and Hoga (Danish varieties), Ligena and Calena (German) and organically produced seed of variety Calena = Bio Calena were investigated. Fat content of the seed was from 27 % to 35 % (w/w). At all locations, the variety with the highest or second highest fat content was Hoga. The highest fat content at all varieties was at the location Savinja Valley - heavy soil, probably due to higher water capacity of such soil in rather dry year. Variety Ligena has the highest oil yield at all locations. Fats composition among varieties differed, but the majority of different fat acids contents was within the expected limits. Eruca acid content was lower than 3.5 % in all varieties. Bio Calena has achieved the highest omega-3 fatty acids content (34.4 %), the lowest content was in variety Vega (28.3 %).
COBISS.SI-ID: 660620
In this work, quantitative correlations between the antioxidant properties and the total phenolic content of different oil cake extracts were studied, among them the oil cakes from linseed (Linum usitatissimum) and camelina (Camelina sativa), as potential sources of antioxidant compounds. Two solvents of different polarity were used to obtain the extracts, resulting in great variation in antioxidant activity. The highest phenolic content was observed for white mustard, followed by camelina, rapeseed and linseed. The antioxidant properties were evaluated by determination of their reducing capacity, free radical scavenging activity and metal chelating ability, by the β-carotene bleaching method and as the effectiveness of inhibition of conjugate diene and triene formation in the bulk oil. The methanolic extracts exhibited higher reducing power (max. rapeseed), DPPH• scavenging activity (max. rapeseed) and chelating ability (max. linseed), while the ethanolic extracts were more efficient in the β-carotene bleaching test (max. camelina). White mustard extracts inhibited conjugate diene and triene formation the most.
COBISS.SI-ID: 4048248
In feeding experiments on hen farm the impact of linseeds and Camelina seeds supplements on fatty acids composition of egg yolk lipids was investigated. For the first experimental group we prepared feed mixture with 5 % inclusion of extruded linseeds, the second group received 5 % supplement, third group combination of 2 % Camelina and 3% linseeds supplement. Control group was fed with standard feed mixture without linseeds and Camelina seeds supplement. With listed supplements eggs were enriched with omega-3 fatty acids 5 to 7 fold. The highest content of omega-3 fatty acids was achieved in the first group (with linseeds supplement), followed by a group fed with combination of linseeds and Camelina seeds, and then the group fed with Camelina seeds supplement. The lowest content had eggs of the control group. If we prepared linseeds to be fed at home, we have to heat and grind it. Because the grind linseed is very oxidative, unstable we have to feed it immediately or protect it with antioxidants. Otherwise, it oxidizes and loses its nutritional value. Industrial feed mixtures with linseed are heated and protected with antioxidants.
COBISS.SI-ID: 667276
At the end of May 2012, symptoms of downy mildew were observed on camelina plants grown within the project CRP V4-1138 on the location Savinja valley (Slovenia). The disease was found in 4 monitored fields (total area 3 ha), and the incidence ranged from 2 to 38% depending on the variety. Symptomatic plants showed whitish, abundant, and fluffy mycelia covering the stems, flowers, seed pods, and undersides of the leaves. Based on morphological characteristics, the causal agent was identified as Hyaloperonospora camelinae (1,3-5). DNA was extracted from mycelium and conidia collected from infected plants in two fields in the Savinja Valley (1HpC and 2HpC). Nuclear internal transcribed spacer (ITS) regions of ribosomal DNA (rDNA) were amplified by PCR assay from two isolates using the universal primers ITS4 and ITS5, and sequenced. Both samples yielded a 781 bp sequence, which showed 100% identity to H. camelinae ITS sequence JX445136 in the NCBI GenBank. The nucleotide sequence was assigned to GenBank Accession No. KJ768405. This is the first report of downy mildew caused by H. camelinae on C. sativa in Slovenia. The representative samples were deposited in the phytopatological herbarium of the Slovenian Institute of Hop Research and Brewing.
COBISS.SI-ID: 653708
The main product of camelina (Camelina sativa (L.) Crantz) is its high nutritional oil, but also its oilcakes contain high levels of proteins, carbohydrates, vitamins, minerals, and low level of phytochemicals such as glucosinolates (GLS) compared with other Brassica species. The aim of this study was to evaluate different camelina cultivars (Danish cultivars Vega and Hoga, German cultivars Calena, organically produced Calena (Bio Calena) and Ligena, and Slovenian autochthonous cultivar) grown in year 2012 on four different locations in Slovenia to find out the chemical composition of seeds and oilcakes as a by-product in oil production that could be used as feed for animals. The content of glucosinolates did not preclude the use of seeds and/or camelina oilcake in animal nutrition. Content of a particular GLS in seeds and consequently in oilcakes was strongly influenced by both environmental conditions during the growing period and by botanical origin. In seeds GLS-10 (6.9–28.5 mmol/g) was the most dominant GLS in all samples. The relative amount of GLS-10 (glucocamelinin) among all GLS was from 59 to 70 %. The second one was GLS-9 (glucoarabin; 1.3–15.3 mmol/g) followed by GLS-11 (11-(metilsulfonil) undecilglucosinolate; 1.5–7.6 mmol/g). The total amount of GLS in the samples ranged from 13.0 to 48.9 mmol/g (mean 24.8 mmol/g). At cultivars Vega and Hoga there was significantly lower content of GLS in oilcakes in comparison to seeds, while in all other cases the contents are comparable.
COBISS.SI-ID: 635020