2.3. Random Amplified Polymorphic DNA (RAPD) analysis
RAPD–PCR was performed using 17 10-mer random primers
selected from the Operon kit (Table 2). PCR reactions were
carried out in 25 ll volumes containing 75 ng of template
DNA, 1· reaction buffer, 1.5 mM MgCl2, 200 lM dNTPs,
1.5 lM of the primer and 1 U of the Taq DNA polymerase
(Promega). PCR amplification was performed using Biometra
gradient Thermolcycler for 35 cycles at 94 C for 1 min, 30 C
for 1 min and 72 C for 1 min. The program was preceded by a
denaturation step at 94 C for 7 min and followed by an elongation
step at 72 C for 7 min. The PCR products were
separated on 1.5% ethidium bromide stained agarose gels
and were photographed on gel documentation system