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Wyświetlanie 1-2 z 2
Tytuł:
Ascertaining optimal protocols for DNA extraction of different qualities of pike (Esox lucius) tissue samples - a comparison of commonly used solid phase extraction methods
Autorzy:
Eschbach, E.
Powiązania:
https://bibliotekanauki.pl/articles/363074.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
szczupak
Esox lucius
ekstrakcja DNA
ekstrakcja do fazy stałej
pike
DNA extractions
solid-phase extraction
Opis:
High quality DNA extractions are a prerequisite for genetic studies of a variety of organisms including fish. The current study focused on the applicability of different commercially available solid phase extraction (SPE) methods as the easiest and fastest methods for DNA extraction and their efficiency with different tissue qualities. These were represented by different kinds of pike tissues (fins, muscle, scales) preserved with different methods and stored at different temperatures over different periods of time (0.5 to 10.0 years). All DNA extractions were analysed according to their yield, purity, integrity and functionality in PCR based downstream analysis. Additionally mechanical pre-treatment of poor quality tissues (e.g. old or aged tissues) and efficient ethanol preservation of frozen bulk fin tissue were investigated. All SPE methods yielded functional DNA from very different qualities of pike tissues as shown by PCR analysis of small nuclear (microsatellite) and large mitochondrial (complete D-loop) DNA fragments. DNA from poor quality tissue can be extracted using single column SPE and in some cases mechanical pre-treatment even improved the yield. Good quality tissue as obtained e.g. from commercial fishermen as frozen bulk material is more efficiently preserved by thawing in ethanol at room temperature than at 2-8°C. DNA from these and air dried tissues was very efficiently prepared by applying reverse SPE in 96-well format, allowing for fast processing of a multitude of samples for high throughput analysis.
Źródło:
Environmental Biotechnology; 2012, 8, 1; 7-14
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gynogenesis in northern pike: UV-inactivation of spermatozoa and the heat shock inducing meiotic diploidization
Autorzy:
Luczynski, M. J.
Dabrowski, K.
Kucharczyk, D.
Glogowski, J.
Luczynski, M.
Szczerbowski, A.
Babiak, I.
Powiązania:
https://bibliotekanauki.pl/articles/363226.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
Esox lucius
gynogeneza
szok termiczny
szczupak pospolity
kontrola płci
UV
gynogenesis
heat shock
northern pike
sex control
Opis:
Gynogenetic northern pike (Esox lucius L.) were produced using UV irradiated sperm and heat shock applied to inseminated eggs shortly after gamete activation. Milt was diluted in immobilizing solution (1:9) and UV irradiated (6.4 W*m-2) for 2-20 min, with dosage in the range of 768-7680 J*m-2. Genetic inactivation of spermatozoa was most efficient when milt was irradiated for 8 min (3072 J*m-2). Insemination of eggs with irradiated milt yielded 100% haploid larvae with hatching rate at 72.1۪.8% (mean±SD), expressed as a percentage of inseminated eggs. Haploid embryo developed and most of them hatched (showing "haploid syndrome") but all haploid larvae died within 48 hours after hatching. After insemination with irradiated sperm the eggs were exposed to a thermal shock of 34°C or 34.5°C, lasting 3 or 5 min, applied 11-16 min after gamete activation. The efficiency of heat shock and survival in experimental groups significantly depended on the source (individual female effect) and quality of eggs. The time of application and duration of the heat shock also affected the survival of embryo and percentage of gynogenetic larvae. Gynogenetic larvae were obtained in all experimental groups with hatching rate as high as 24.2ۭ.6%.
Źródło:
Environmental Biotechnology; 2007, 3, 2; 39-43
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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