Niklas Jeppsson's research while affiliated with Swedish University of Agricultural Sciences and other places

Publications (11)

Article
Plant breeding in black chokeberry (Aronia melanocarpa) is based mainly on seedlings derived from domesticated Russian plants. Previous studies have, however, demonstrated very low levels of phenotypic variation within this gene pool. The present investigation was undertaken in order to study the genetic structure in native populations growing in N...
Article
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We here report the results from two parsimony analyses of all 15 recognized taxa in Hippophae (Elaeagnaceae), one based on chloroplast DNA (cpDNA), and one based on a combined data set of morphological characters and cpDNA. The genera Elaeagnus and Shepherdia were used as outgroup taxa. In general, the results are congruent with a previous RAPD stu...
Article
Black chokeberry, Aronia melanocarpa, is a self-compatible, diploid species, which grows naturally in North America. It has been cultivated as a berry crop in Russia for several decades. The berries can be used for the production of natural food colourants. Recently, a plant breeding project based on seedlings derived from domesticated Russian plan...
Article
Different fractions of sea buckthorn fruits were investigated for antioxidant activity and its relationship to different phytonutrients. Capacity to scavenge radicals of the crude extract, like the phenolic and ascorbate extracts, decreased significantly with increased maturation. The changes were strongly correlated with the content of total pheno...
Article
Black chokeberry fruits are rich in anthocyanins and can be used as a raw material for the production of natural food colourants. Fruit quality was studied during maturation in three true black chokeberry cultivars and in three cultivars derived through hybridization between chokeberry and rowans (Sorbus spp.). For each trait studied, the three bla...
Article
Eight genotypes of true black chokeberry (Aronia melanocarpa) (TBC) and four Aronia x Sorbus hybrid (ASH) cultivars were characterised for various fruit quality parameters in 1995 and 1996. Mean berry weight, anthocyanin (Acy) content, soluble solids content (SSC), Acy composition and content of brown compounds (browning index, BI) were studied. In...
Article
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Genetic diversity has been investigated by the application of molecular markers in, for the first time, all the taxa recognised in recent treatises of the genusHippophae. RAPD (random amplified polymorphic DNA) analyses were conducted with 9 decamer primers, which together yielded 219 polymorphic markers. We found 16 fixed RAPD markers, i.e. marker...
Article
The effect of fertilizer rate on fruit quality parameters in the black chokeberry (Aronia melanocarpa [Michx] Ell.) cv. `Viking' was studied over three years. A combined N–P–K fertilizer was applied in different rates. Plant height, yield, berry weight, anthocyanin content, content of brown compounds, content of soluble solids, anthocyanin composit...
Article
Full-text available
Random amplified polymorphic DNA (RAPD) markers were used to characterize a part of a sea buckthorn gene bank collected for plant breeding purposes. Molecular markers were generated in 55 cultivars and accessions, representing five subspecies of Hippophae rhamnoides L. and intraspecific hybrids between different subspecies. Sixty-three markers were...
Article
The contents of kaempherol, quercetin and L-ascorbic acid in sea buckthorn berries were measured at different maturation stages using High Performance Liquid Chromatography (HPLC) methods. The content of ascorbic acid decreased over time with significant differences between sampling dates for the five cultivars studied. The mean decrease was 25% in...

Citations

... Süs çeşitlerinin hepsinin yenilebilir meyveleri olmasına rağmen meyveleri daha küçük ve verimleri meyve veren çeşitlerden daha düşüktür. Kırmızı meyveli (Aronia arbutifolia (L.) Elliot), mor meyveli (Aronia prunifolia Marsh), siyah meyveli (Aronia melanocarpa (Michx) Elliot) olarak en çok bilinen üç aronya türü bulunmaktadır (Hardin, 1973;Lehmann, 1982;Jeppsson, 2000). ...
... Other cultivar names exist, such as 'Aron' and 'Nero,' though random amplification of polymorphic DNA (RAPD) and inter-simple sequence repeat (ISSR) studies revealed that these other cultivars were genetically very similar or nearly identical to 'Viking' (Milosz et al., 2011;. This improved form is tetraploid and seedlings are all apogamous products of the same genotype (Persson et al., 2001;. ...
... Comparison of the present data on the time and dynamics of berry ripening suggests their compliance with the results of Hardin (1973), Rumińska (1991) and Brand (2010), who obtained that aronia berries ripen from July-September, but not with those of Kawecki and Tomaszewska (2006) and Andrzejewska et al. (2015) in Poland, nor with the findings of Jeppsson and Johansson (2000) in southern Sweden where aronia enters the harvested stage from mid-August to October. ...
... The average ascorbic acid content found in the sea buckthorn juice used in this study was 98.85 mg/100 g. Previous studies revealed extensive variations in vitamin C content, ranging from 28 to 310 mg/100 g in the berries from the European subspecies of H. rhamnoides [20,32]. The sea buckthorn juice had an intense orange color due to its high total carotenoid content (14.66 mg/100 g). ...
... Sea buckthorn (Hippophae) is a deciduous shrub belonging to family Elegnaceae. The genus comprises of seven species and eight subspecies and among these H. rhamnoides is widely distributed [1]. It is native to Europe and Asia [2] and is naturally distributed over the arid, semi-arid and high mountainous ecosystems of Asia and Europe like China, Russia, India, Nepal, Bhutan, Pakistan, Afghanistan, France, Britain, Finland, Sweden, Mongolia and Norway [3]. ...
... A number of attempts have been made by researchers worldwide to assess the genetic diversity and phylogeny of Hippophae sp. (8,18,(28)(29)(30)(31). ...
... In most cases, molecular phylogenetic analysis and morphological clustering are reliable methods for providing genetic relationships and predicting reproduction compatibility among plant species (Baral and Bosland, 2004;Kubota et al., 2012). Currently, several phylogenetic studies have provided credible insights for understanding the evolutionary relationships of Elaeagnus, and the consensus trees supported the monophyletic origin of the genus Elaeagnus and Hippophae (Bartish et al., 2002;Kim et al., 2020;Zhao et al., 2020). Son et al. (2014) provided the molecular phylogenetic relationships of nine common Asian Elaeagnus species based on nrDNA ITS sequences. ...
... Leaf length and width showed a negative correlation (p > 0.001), whereas the degree of thorniness (number of thorns per 10 cm) and leafiness (number of leaves per 10 cm) were positively correlated with the altitude. Our results support some of the previous studies (Bartish et al. 2000;Korekar et al. 2011;Singh 2002Singh , 2014. However, phenotypic variations existing in population are attributed to genetic background differences and variation in geographical conditions, including altitude, climate, and soil (Li et al. 2020). ...
... However, Papp et al. (1984) found that TSS of "Malling Exploit" floricane red raspberries decreased with high N fertilizer rates in Budapest, Hungary [31]. In addition, Stojanov et al. (2019) reported that pH and TA varied by fertilizer source and rate in "Meeker" red raspberries and Jeppsson (2000) found that the "Viking" black chokeberry TA differed by fertilizer rates, while Rizzi et al. (2019) and Milošević et al. (2018) found no differences in the pH and TA across different fertilization regimes in "Autumn Bliss" red raspberries and "Thornfree" blackberries, respectively [9,10,26,32]. Both Stojanov et al. (2019) and Milošević et al. (2018) observed that TSS/TA differed by fertilization regimes in "Meeker" red raspberries and "Thornfree" blackberries, respectively, whereas Rizzi et al. (2019) reported the similar SS/TA across fertilizer treatments in "Autumn Bliss" red raspberries [9,10,26]. ...
... Test results were expressed in terms of micromoles of Trolox per gram of dry weight. I Analysis of total phenolic content: The total phenolic content was determined by the Folin-Ciocalteu method [33]. The pomace extract (0.1 mL) was mixed with 2 mL of water and 0.2 mL of Folin-Ciocalteu reagent. ...