National Repository of Grey Literature 25 records found  beginprevious14 - 23next  jump to record: Search took 0.00 seconds. 
Development and validation of methods for GMO detection
Hodek, Jan ; Ovesná, Jaroslava (advisor) ; Konopásek, Ivo (referee) ; Pazlarová, Jarmila (referee)
The present work is focused on the issue of genetically modified organisms (GMOs) detection in the plants and derived products. Existing legislation in the European Union regulates monitoring of GMO and lays down rules for their labeling and traceability. The aim was to contribute to solving certain issues of critical points in GMO detection. The first point was DNA extraction. The problem was adressed to the example of DNA extraction from the fruit of papaya and candied papaya. For both food products the suitability of the selected extraction methods was verified and confirmed by amplification of a specific DNA sequence by PCR. The second critical point was related to PCR inhibitors. We observed the effect of real-time PCR inhibition due to the influence of the residual EDTA and the residual amount of heavy metal ions, which were present in laboratory plastic. In both examples, the inhibition affects the PCR efficiency. Another critical point in the GMO detection is use of screening elements. That work was focused on false positive results. Development of new methods for GMO detection was another goal of this work. We have developed the method for garden pea taxon-specific gene quantification by real-time PCR. The method was tested on 13 cultivars of garden pea and several related plants of...
The sampling methodology for GM plants unintentionally present in the environment
Ovesná, Jaroslava ; Kučera, Ladislav ; Sovová, Tereza ; Mitrová, Katarína ; Pouchová, Vladimíra
In this methodology, sampling of plants from agricultural crops(corn, soybean, canola and potato) is defined to assess the presence of unauthorized GM plants in the environment.The methodology is applied mainly in the field of inspection controls of the compliance with Act no.78/2004. The sampling and collected samples must represent to a maximum extent the crops of the controlled part of the field (land parcel or land parcel portion). The basic applications of the methodology include:(a) low portion of unauthorized GM plants(seed contaminated with GM plants unauthorized for cultivation), (b) monitoring of the presence of unauthorized GM plants on land parcel, where there was such an occurence recorded in previous years (for example, plants growing on the field from seeds or tubers from the so called "soil´s seed bank").
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The use of microsatellite analysis for the characterisation of onion
Mitrová, Katarína ; Ovesná, Jaroslava
The object of the methodology is the process characterizing the autenticity of varieties of onion put through microsatellite analysis (SSR- Single Sequence Repeats) for the characterization of varieties of garlic into the practice. This method allows to identify varieties of onion and characterize genetic resources using DNA markers and determine their genetic similarity based on the length variability of short repeating sequences (microsatellites) in the characterization of varieties of onion, Allium cepa L. The principle of the method is amplification of the genome containing the microsatelite locus by polymerase chain reaction (PCR) using specific primers and subsequent analysis of the lengtht of the products and the identification of the DNA profile to the declared variety.
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The use of microsatellite analysis for the characterisation of garlic
Mitrová, Katarína ; Ovesná, Jaroslava ; Svobodová, Leona
The object of the methodology is the process characterizing the autenticity of varieties of garlic put through microsatellite analysis (SSR- Single Sequence Repeats) for the characterization of varieties of garlic into the practice. This method allows to identify varieties of garlic and characterize genetic resources using DNA markers and determine their genetic similarity based on the length variability of short repeating sequences (microsatellites) in the characterization of varieties of garlic, Allium sativum L. The principle of the method is amplification of the genome containing the microsatelite locus by polymerase chain reaction (PCR) using specific primers and subsequent analysis of the lengtht of the products and the identification of the DNA profile to the declared variety.
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Methodology for analysis of dairy products and their soy analogues for the presence of RoundUp Ready soybean
Tesařová, Zuzana ; Šídová, Dana ; Vráblík, Aleš ; Hodek, Jan ; Ovesná, Jaroslava
Dairy products may be subject to adulteration, where there is a relatively expensive raw material (e.g. cream) replaced by the addition of vegetable fats. Milk can be replaced in dairy products for example by soybean extract. Because soy belongs among strong allergens and the incidence of allergy is rather high. Therefore it is necessary to have a method for its detection. This work introduces the method for detection of soy, including analysis of genetic modified RoundUp Ready soybean. Detection of soybean in dairy products is based on analysis of amplification products melting profiles by High Resolution Melting (HRM) method. Analysis of geneticaly modified RoundUp Ready soybean is based on DNA detection via Polymerase Chain Reaction(PCR).
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Zabezpečení laboratorní detekce geneticky modifikovaných organismů
Výzkumný ústav rostlinné výroby‚ Praha-Ruzyně ; Koucká, Petra ; Hodek, Jan ; Pouchová, Vladimíra ; Kučera, Ladislav ; Ovesná, Jaroslava
Podklady pro metodiku vzorkování rostlinných materiálů pro potřeby správních úřadů. Zpracování informací z ENGL pro potřeby ČIŽP. Shromažďování referenčních materiálů. Metodiky stanovení GMO. Svazek obsahuje sborník na téma Geneticky modifikované organismy - současnost, rozšíření a možné interakce s životním prostředím. Jednotlivé příspěvky ve sborníku: geneticky modifikované organismy - základní informace, Možnosti stanovení GMO, Křižitelnost plodin a planých druhů jako potenciál pro únik genetických modifikací, Šíření pylu v porostech lnu setého, Problematika GM hrachu v ČR, Perspektivy využití GMO, Problematika GM bramboru v ČR.
Informace o geneticky modifikovaných organismech
Vysoká škola chemicko-technologická v Praze, Praha ; Pazlarová, Jarmila ; Demnerová, Kateřina ; Kučera, Ladislav ; Ovesná, Jaroslava ; Káš, Jan
Publikace je záznamem přednášek ze dvou školeních pro inspektory České inspekce životního prostředí, které proběhly na VŠCHT v Praze v roce 2003. Jsou uvedeny přenášky, které přinášejí základní informace o problematice geneticky modifikovaných organismů, včetně metod jejich detekce a stanovení.
Zabezpečení laboratorní detekce geneticky modifikovaných organismů
Výzkumný ústav rostlinné výroby‚ Praha-Ruzyně ; Ovesná, Jaroslava
Metodika vzorkování rostlinných materiálů. Validační testy kvantitativního stanovení GMO pro JRC Ispra. Vzorkování - projekt KeLDA. Operativní stanovení přítomnosti GMO. Vedení pracovní skupiny "European Decision Tree" při ENGL. Čerpání financí.
PCR based assay for detection garden pea lec gene
Vráblík, Aleš ; Hodek, Jan ; Ovesná, Jaroslava
The method was developed and verified by staff of National reference laboratory for GMO identification and DNA fingerprinting suited for governmental control laboratories and private laboratories that analyze food and feed derived from various plant matrices. Method can be applied for quantification of GM pea in a sample, when reference gene is used as a standard. The method describe internal garden pea specific gene, lektin in this case, detection using PCR and real-time PCR. The general principle of the assay relies on lektin specific sequence presence that represents a species specific gene of garden pea. In many matrices DNA is damaged so amplification of short stretches of DNA is used. After amplification of target exploiting newly developer species specific gene primers PCR products are separated by electrophoresis in agarose gel. Resulting band is visualized by UV light and its position is compare with size standard. Alternatively, real-time PCR and ABI platform in combination with SYBR® Green can be used. Reaction parameters are described and specificity of reaction was verified. LOD as well as LOQ was defined.
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Qualitative analysis of transgenic rice line Bt 63 using PCR
Ovesná, Jaroslava ; Hodek, Jan ; Pavlátová, Lucie
Principle of the assay is to discover in the sample of DNA 83bp lenght specific nucleotide sequence of transgenic construct of Bt 63 rice in the border of Bt gene and the NOS terminator. After amplification of target DNA, the PCR products are separated by way of elektroforesis in agarose gel. The final 83bp lenght PCR product is visualizated in UV light as a shining strip on gel in certain position.
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National Repository of Grey Literature : 25 records found   beginprevious14 - 23next  jump to record:
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1 Ovesná, Jana
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