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Acta Botanica Hungarica
S. Esfandani-Bozchaloyi
M. Sheidai
, and
M. Hassanzadeh Kalalegh

The genus Geranium (Geraniaceae); with about 320 species throughout the temperate regions, is chemically characterised by the presence of tannins, flavonoids, anthocyanins and essential oils which interfere with the extraction of pure genomic DNA. It is necessary to optimise the extraction protocols to reduce the effects of the presence of these compounds to the lowest level.

The present study compares the plant genomic DNA extraction Kit (DNP™ Kit), CTAB DNA extraction method by Murray and Thompson and Sahu et al., from the extracting DNA point of view Geranium species. The results showed significant differences in DNA contents between the three methods. Quantity and quality of extracted genomic DNAs were compared by employing the spectrophotometer, Nano-Drop, agarose gel electrophoresis, and polymerase chain reaction (PCR) methods and molecular marker such as (ITS and trnL-F) and ISSR. The method of Sahu et al., provided the best results (200 ng/µL) in terms of quantity and quality of DNA, therefore, this method was taken and optimised for DNA extraction. Our results proposed that this method could be effective for plants with same polysaccharides, proteins and polyphenols components. The advantage of this method is that it omits the use of liquid nitrogen and toxic phenols which are expensive. The success of this method in obtaining high-quality genomic DNA has been demonstrated in the Geranium species group and the reliability of this method has been discussed.

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