Dagmar Janovská

• PhD
• Curator of Minor Crops Collections at Czech Agrifood Research Center

Intercropping, the cultivation of two or more crops in the same field, is known to have numerous environmental and economic benefits. The success of such systems depends on geographical location, climatic conditions, and the choice of crop varieties, especially in organic systems. This study aimed to assess the effect of the sowing method, wheat va...

This study examines the impact of environmental conditions on the growth, yield, and biochemical composition of common buckwheat (Fagopyrum esculentum Moench.) across two locations in Central Europe over three consecutive growing seasons (2019–2021). Significant variations in meteorological conditions, including temperature fluctuations and rainfal...

Quinoa is a highly nutritious crop with diverse applications in the food industry. The study assessed the impact of various processing techniques, including microwaving, boiling, roasting, steaming, flaking, and germination, on the crude protein content (CP), total phenolic content (TPC), antioxidant activity (AA), and 12 phenolic compounds in quin...

Excessive use of synthetic herbicides can cause environmental and public health problems, as well as herbicide-resistant weeds, so it is imperative to find a more sustainable method of weed management. In this study, twenty-nine accessions of two buckwheat species (Fagopyrum esculentum Moench (common buckwheat) and Fagopyrum tataricum (L.) Gaertn....

Background Tartary buckwheat, Fagopyrum tataricum, is a pseudocereal crop with worldwide distribution and high nutritional value. However, the origin and domestication history of this crop remain to be elucidated. Results Here, by analyzing the population genomics of 567 accessions collected worldwide and reviewing historical documents, we find th...

Characterisation of genetic diversity is critical to adequately exploit the potential of germplasm collections and identify important traits for breeding programs and sustainable crop improvement. Here, we characterised the phenotypic and genetic diversity of a global collection of the two cultivated buckwheat species Fagopyrum esculentum and Fagop...

Understanding the diversity in morpho-phenological characteristics, as well as variations in nutrients and nutraceutical compounds among the different buckwheat genetic resources, plays an important role in their effective use and breeding purposes. In 2020 and 2021, a total of 23 buckwheat accessions were grown in the Slovenian environment. During...

Common buckwheat (Fagopyrum esculentum Moench) is an ancient crop with a world wide distribution. Due to its excellent nutritional quality and high economic and ecological value, common buckwheat is becoming increasingly important throughout the world. The availability of a high-quality reference genome sequence and population genomic data will acc...

Intercropping is a technique in which two or more crops are grown together that is reported to be soil and water friendly. Field trials were conducted at three different localities in the Czech Republic. Spring wheat was grown together with different legumes (Egyptian clover, crimson clover, red clover, white clover, common pea, dun pea, common vet...

Quinoa displays huge genetic variability and adaptability to distinct climatic conditions. Quinoa seeds are a good source of nutrients; however, the overall nutritional composition and nutrient content is influenced by numerous factors. This study focused on the nutritional and morphologic evaluation of various quinoa genotypes grown in the Czech R...

The effect of simultaneous intercropping of winter wheat (Triticum aestivum L.) with different legumes of faba bean (Vicia faba L.), pea (Pisum sativum L.), and purple clover (Trifolium incarnatum L.) on selected production and qualitative parameters of wheat was evaluated in field trials conducted both in organic and conventional cropping systems,...

Crop domestication usually leads to the narrowing genetic diversity. However, human selection mainly focuses on visible traits, such as yield and plant morphology, with most metabolic changes being invisible to the naked eye. Buckwheat accumulates abundant bioactive substances, making it a dual-purpose crop with excellent nutritional and medical va...

Environmental extremes and climatic variability have enhanced the changes in numerous plant stressors. Researchers have been working to improve “major” crops for several decades to make them more adaptable and tolerant to environmental stresses. However, neglected and underutilized crop species that have the potential to ensure food and nutritional...

Buckwheat is a nutritionally valuable crop, an alternative to common cereals also usable in gluten-free diets. The selection of buckwheat genotypes suitable for further breeding requires the characterization and evaluation of genetic resources. The main objective of this work was to evaluate selected phenotypic and morphological traits using intern...

Hulled wheats (emmer, einkorn, and spelt) have low yields but are suitable for organic and low-input agriculture under marginal or high-stress conditions. However, data on the composition of hulled wheats, often also called ‘ancient wheats’ is still scarce, especially on bioactive components such as vitamins. This chapter shows that einkorn, emmer...

Background: Consumer demand for organic spelt wheat has increased rapidly and production has expanded into semi-arid regions, where it was not traditionally grown. Methods: Here, we report the results of a factorial field experiment designed to compare the performance of four spelt varieties grown in rain-fed and irrigated, conventional and organic...

Resistance to Fusarium head blight (FHB) of spelt wheat was investigated in field trials carried out at three European locations between 2016 and 2018. Resistance was assessed after artificial inoculation by visual scoring of symptoms and the determination of the contamination of grains and glumes with the mycotoxin deoxynivalenol (DON). It was fou...

Previous studies reported higher antioxidant and mineral micronutrient concentrations in organic compared to conventional wheat flour, but the reasons are poorly understood. Here we report results from a long-term, factorial field experiment designed to assess effects of variety choice, supplementary irrigation and contrasting fertilization regimes...

Snake fruit (Salacca zalacca (Gaert.) Voss) is a fruit species traditionally cultivated in Indonesia and other Southeast Asian countries. The edible parts of the fruits contain a certain amount of total phenolic, flavonoid, and monoterpenoid compounds, proving them to be their perfect sources. The main goal of this work was to detect, quantify, and...

This study aimed to develop an efficient micropropagation protocol for Disanthus cercidifolius Maxim., an ornamental shrub. Sprouting buds of two genotypes (‘Trubaʼ and ‘PdSʼ) were used as an initial plant material. For the in vitro propagation experiment, the nodal segments were cultured on a MS medium supplemented with either N⁶-benzyladenine (BA...

Background Tartary buckwheat (Fagopyrum tataricum) is a nutritionally balanced and flavonoid-rich crop plant that has been in cultivation for 4000 years and is now grown globally. Despite its nutraceutical and agricultural value, the characterization of its genetics and its domestication history is limited. Results Here, we report a comprehensive...

The quantity and quality of protein and the rheological traits of wheat are crucial for processing flour in the baking industry, but there are few comparisons in the literature between old and modern wheat species. To help fill this gap, the baking quality characterization, gluten content, protein fraction composition, high molecular weight gluteni...

Spelt (Triticum spelta) is an ancient wheat which is attracting renewed interest with an increasing demand for wholegrains and ancient cereals in the diet. This study evaluates the yield and quality performance of four contrasting European spelt varieties (both landraces and modern cultivars) grown with different fertiliser types (cattle slurry, fa...

Fagopyrum cymosum is considered as most probable wild ancestor of cultivated buckwheat. However, the evolutionary route from F. cymosum to F. esculentum remains to be deciphered. We hypothesized that a hybrid species exists in natural habitats between diploid F. cymosum and F. esculentum. The aim of this research was to determine the phylogenetic p...

Sorghum is one of the most important cereal crop and ranks fifth among cereals after wheat, rice, maize and barley for economic importance. Because the demand of food is increasing, sorghum will increase in importance as a source of food, feed, fibre, and fuel; specially in the European continent where sorghum is little cultivated, mainly due to th...

Acreage of oat (Avena sativa L.) in Europe was steadily declining during the last century due to less breeding progress compared to other cereals. However, oat remains a valuable crop for food and feed, as well as for sustainable crop rotations. To unravel the genetic and phenotypic diversity in oat breeders’ germplasm collections, a diversity pane...

Main conclusion Emerging insights in buckwheat molecular genetics allow the integration of genomics driven breeding to revive this ancient crop of immense nutraceutical potential from Asia. Out of several thousand known edible plant species, only four crops-rice, wheat, maize and potato provide the largest proportion of daily nutrition to billions...

The study aimed at evaluating the total content of polyphenols (TPC) and phenolic acids (TPA) in grain of 4 spring einkorn, 4 emmer, 4 spelt and 4 common wheat genotypes cultivated under organic cropping system in two-year trials. The TPC and TPA were significantly affected both by genotype, wheat species and crop year (weather conditions). At the...

The occurrence of selected Fusarium species was studied in wheat sample collections that involved common wheat, einkorn, emmer and spelt genotypes. The study using PCR (Polymerase Chain Reaction) assays aimed to identify the Fusarium species occurring in hulls and grains of evaluated wheat samples separately and to assess the role of hull in Fusari...

A triennial evaluation of the content of titratable acids (TA) in grain was carried out on 12 varieties of proso millet ( Panicum miliaceum L.). The model variety, Mironovskoe 94, harvested in 2004, was used for the monitoring of sensory changes in TA content, in relationship to different storage conditions and the application of different grain pr...

Jasmonates (JAs) are plant hormones that induce many secondary metabolites accumulation, such as rutin in buckwheat, via regulation of JAs-responsive transcription factors (TFs). Here, we report on the identification of a clade of JAs-responsive subgroup 4 MYB TFs, FtMYB13, FtMYB14, FtMYB15 and FtMYB16, directly repressing rutin biosynthesis in Fag...

Fusarium Head Blight is caused by several Fusarium species. Infections can result in mycotoxin contamination on cereals and associated foods. Harvested products are contaminated due to its secondary metabolites. The aim was to analyse the occurrence of spike Fusarium and Alternaria spp. in hulled Triticum spelta L. wheat species via polymerase chai...

This chapter provides comprehensive information about buckwheat history, cultivation, and traditional and current utilization in the Czech territory. The last few decades have seen a significant increase in the utilization, demand, and growth of healthy buckwheat products. Nowadays, common buckwheat is one of the main cash crops in Czech organic pr...

Climate change is connected to many undesirable aspects which may strongly affect agricultural production in the future, not only in the Czech Republic but also in other countries in Central Europe. The most serious risks with the main impacts on agricultur‐ al production are the frequency and intensity of occurrence of extreme events. Prob‐ lems c...

In this study, the genetic diversity and relationships among eight millet genera were investigated by molecular and morphological data analyses. Sixty-nine millet accessions were analysed by using amplified fragment length polymorphism (AFLP) markers, and evaluated for morphological traits. Eight AFLP primer pairs were amplified successfully and 77...

Fusarium mycotoxins are frequent contaminants in cereals at temperate zone. Next to deoxynivalenol (DON), there are other masked forms of DON, deoxynivalenol-3-glucoside (D3G) or 3(15)-acetyl-deoxynivalenol (3(15)-ADON), but changes among these forms are still insufficiently known. All these forms were evaluated in germinating kernels of wheat and...

Cereals are the most growing crops under organic conditions. Cereals are supposed to be a source of mycotoxins produced by Fusarium species. Our research was led to describe the differences among natural Fusarium species occurrence in two localities and two growing systems – organic and conventional. The main differences were observed among years a...

Collection of spring form of spelt wheat, emmer wheat and einkorn wheat genetic resources from the Gene Bank of CRI Prague-Ruzyně, cultivated in exact field small-plot trials under organic farming conditions of three experimental localities (Prague-Ruzyně, Prague-Uhříněves and České Budějovice) was evaluated with the view of basic technological par...

The effect of Fusarium spp. infestation on rheological quality of rye flour in different growing systems (organic and conventional) was measured by the rheological system Mixolab. The content of mycotoxins (DON, D3G, 3-ADON and ZON) and standard technological quality parameters of grain were determined as well. Significantly worse technological and...

The genetic diversity among different millet genera is not very well known; therefore, an investigation was undertaken with Inter Simple Sequence Repeats (ISSR) markers to ascertain the possibility of using these DNA markers to reveal the genetic relationships among different millet genera/species. Twelve out of 30 screened ISSR primers amplified s...

It is difficult to produce high-quality certified organic seeds. Certified organic seeds are rare and organic farmers usually have to use conventional untreated seeds or farm saved seeds in order to establish their crop stands. For this reason, we studied and evaluated health and biological characteristics of two varieties of common oat and two var...

In laboratory and field experiments with two varieties of spring wheat (SW Kadrilj, Vinjett) influence of seed quality on field emergence and yield was tested in organic and conventional farming systems. Field trials were established from 2010 to 2013 at the Experimental Station in Prague Uhrineves. The differences were found between four categorie...

V. Zedek, R. Jandová and V. Holubec (eds.) The aim of this booklet is to review the importance of plants for nutrition and human health. Plants provide the main source of energy in food (such as sacharides, proteins and fats) for humans. These are basically taken from several main crops. Plants also provide a wide range of other compounds important...

Strong drought tolerance is an important objective in breeding new wheat varieties. We compared the drought tolerance of land races and modern varieties of various spring wheat forms. C-13 discrimination (CID) indicated how significantly the tested wheat varieties were inclined to drought tolerance. CID is a trait related to stomatal closure and co...

Demand for organic foods is partially driven by consumers' perceptions that they are more nutritious. However, scientific opinion is divided on whether there are significant nutritional differences between organic and non-organic foods, and two recent reviews have concluded that there are no differences. In the present study, we carried out meta-an...

Hulled wheat species (einkorn, emmer, spelt) are presumed to be an alternative to bread wheat in organic agriculture since the yield penalty is less pronounced under organic farming and generally higher prices can be achieved for specialty grains. The present study analysed differences between wheat species with respect to biomass production, harve...

Rancidity development was studied in 22 samples of selected millet species (Panicum miliaceum, Setaria italica, Pennisetum americanum, Echinochloa frumentacea and Eleusine coracana). Fat content was evaluated in the foxtail millet (Setaria italica) and proso millet (Panicum miliaceum) varieties. The effects of different storing conditions, three pr...

Our research has been aimed at an evaluation of the influence of seed health conditions on biological characteristics of seeds and a following seed generation (it was demonstrated on a model crop - oat). Exact small-plot trials were established on three different experimental certified organic parcels in the Czech Republic between 2010 and 2011. Tw...

In this work the agronomic characteristics related to the production of grain in 18 genotypes of amaranth cultivated at the Faculty of Agriculture, Universidad Nacional de la Pampa, Argentina were studied. They were compared: days to the emergency and to coverage of the space between furrows, diameter of stem, necessary days to come to anthesis, mi...

Amaranthus hybridus and Amaranthus mantegazzianus are commonly cultivated and the entire young fresh plants consumed as vegetables in regions of Africa and Asia. A. hybridus and A. mantegazzianus were cultivated at four sites in three climate regions of the world: Santa Rosa, Argentina; Lleida, Spain; and Prague and Olomouc, both in the Czech Repub...

In a cultivation experiment 18 different Amaranthus genotypes were cultivated in parallel in Argentina, Mexico, Spain and two different locations in the Czech Republic. The ripe seeds were analysed for their content of 11 polyphenols and the variations among genotype, species and location were analysed by principal component analysis (PCA). The fla...

Wheat is worldwide consumed and contributes significantly to the intake of antioxidants with beneficial healthy effects. In the precise two-year field experiments in 2008 and 2009 two varieties of wheat einkorn, two varieties of emmer wheat and three varieties of spring wheat and in 2009 in addition two other spring wheat varieties, three einkorn v...

A reverse-phase high-performance liquid chromatographic method for the determination of trans-resveratrol with spectrophotometric detection (306nm) and amperometric detection at carbon paste electrode (E=+1,2V) was developed and tested on real samples of grains, hulls and leaves of six varieties of common buckwheat (Fagopyrum esculentum Möench) and...

In order to simplify the identification of amaranth accessions in gene banks or seed laboratories, a comprehensive method based on band position and relative band intensity data from the glutelin patterns of the chip microfluidic electrophoresis was developed. Chip electrophoresis protein fraction patterns were compared with the patterns obtained b...

Wheat contributes significantly worldwide to antioxidant income with beneficial healthy effects. Two varieties of einkorn wheat (Triticum monococcum L. – Escana and Schwedisches Einkorn), two varieties of wild emmer [Triticum dicoccum Schuebl (Schrank)] (Rudico and Kahler Emmer) and three varieties of spring wheat (Triticum aestivum L. – Granny, Kä...

Microgreens from common and tartary buckwheat genotypes were evaluated for total flavonoid content (rutin, quercetine and kaempferol separately), bound phenolic acids content, carotenoids and -tocopherol content and antioxidant activity. The results have shown that in common and tartary buckwheat microgreens antioxidant activity was found. High lev...

Microgreens from common and tartary buckwheat genotypes were evaluated for total flavonoid content (rutin, quercetine and kaempferol separately), bound phenolic acids content, carotenoids and α-tocopherol content and antioxidant activity. The results have shown that in common and tartary buckwheat microgreens antioxidant activity was found. High le...

A triennial evaluation of the content of titratable acids (TA) in grain was carried out on 12 varieties of proso millet ( Panicum miliaceum L.). The model variety, Mironovskoe 94, harvested in 2004, was used for the monitoring of sensory changes in TA content, in relationship to different storage conditions and the ap- plication of different grain...

Genetic diversity of plant genetic resources for food and agriculture is a unique and irreplaceable source for further crop genetic improvement. The aim of this paper was the field evaluation of buckwheat genetic resources in the Czech Republic. In the case of the 77 common buckwheat (Fagopyrum esculentum Moench.) genotypes, most had reddishgreen s...

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Rutin is a natural antioxidant useful for human health. The aim of this study was to compare some analytical methods for rutin determination in a plant material - tartary buckwheat (Fagopyrum tataricum (L.) Gaertn.) - of different origin. The methods used were HPLC/UV and two spectrophotometries. Both spectrophotometric methods gave higher values t...

Rhaponticum carthamoides (Willd.) Iljin is a perennial herb, commonly known as a maral root or Russian leuzea, which has been used for centuries in eastern parts of Russia for its marked medicinal properties. This review based on 117 literary sources, with many of them being originally published in non-English languages (mainly in Russian), discuss...

The crude ethanol extracts of the aerial parts and roots of Leuzea carthamoides. DC., Leuzea centauroides. (L.) Holub, Leuzea longifolia. Hoffmgg. & Link, and Leuzea rhapontica. subsp. bicknellii. (Briq.) Holub have been investigated for their antibacterial activity. Growth inhibition using a broth tube dilution test was determined against Bacillus...

The antimicrobial activity of the dichloromethane extract from aerial parts of Leuzea carthamoides DC. was tested in vitro against 19 Staphylococcus aureus strains (ATCC 25923, CNCTC Mau 43/60, clinical isolates). The extract was fractionated by column chromatography on silica gel into six fractions (petroleum ether, toluene, dichloromethane, ethyl...

The antimicrobial activity of crude ethanolic extracts of 10 medicinal plants used in traditional Chinese medicine was tested against five species of microorganisms: Bacillus cereus, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans. Of the 10 plants tested, 5 showed antimicrobial activity against one or more spe...

The interest of growing common buckwheat and its consumption increase in Czech Republic. In this paper, four common buckwheat varieties registered in National List of Varieties of Central Institute for Supervising and Testing in Agriculture (CISTA) were evaluated for morphological, growth and agronomical traits. The experiment was launched in Pragu...

I Genetic diversity of plant genetic resources for food and agriculture (PGRFA) is unique and irreplaceable source for further genetic improvements of crops . One of types of PGRFA ex situ conservation is under regulated conditions in Gene Banks. Before storage in Gene Bank is the most important evaluation of PGRFA in field trials. This paper descr...

Rutin is a natural antioxidant beneficial to human health . The objective of the study was to compare the results of three analytical methods (HPLC and two spectrophotometric ones) used for the determination of rutin concentration in plant material that was represented by Tartary buckwheat from different countries of origin . The highest rutin conc...

Five tartary buckwheat genotypes were evaluated under conditions in Prague locality, Czech Republic. The accession marked 'Z5 I0000I' had the longest vegetative period (147 days) and the lowest WTS (12.5 g), but the highest yield (755 kg per ha). The highest rutin content (51.1-71.8 glkg d.m.) was determined in leaves in full flowering stage The co...

Název z obálky V tiráži vročení 2009

Název z obálky V tiráži vročení 2009