3.2. PCR amplification
For molecular analysis, the so called barcoding region of the
mitochondrial genome encoding Cytochrome C Oxidase subunit I
was amplified using the ‘‘universal primers’’ LCO1490 and HCO
2198, as described by Folmer et al. [32]. The PCR system was set up
in a reaction volume of 25 ml including 160 mM dNTPs (GE
Healthcare), 10 pmol of each primer (Biospring, Frankfurt), 0.3 mg/
ml BSA (Sigma Aldrich), 1.5 U Taq DNA Polymerase (Sigma Aldrich)
and buffer provided by the manufacturer which included MgCl2
and 1 ml DNA.
For PCR amplification, a T3000 thermal cycler (Biometra) was
used. The parameters for amplification were applied according to
Boehme et al. [34].
The success of each amplification was confirmed by gelelectrophoresis
in a 3% agarose gel, stained with GelRed (Biotium,
Darmstadt) and visualized under UV light.