Positive clones were screened (
restriction analysis) by isolation of recombinant plasmid following (Thermo scientific Miniprep Kit) manufacturer recommendations and results were visualized on 1% agarose gel.
In order to establish the dissimilarity between strains we conducted a
restriction analysis with PacI and PmeI (Table 2).
The positive clone after
restriction analysis was utilized for DNA sequencing (Sanger et al., 1977).
In addition various molecular characterization studies were also carried on different species, cultivars and accessions of Pistacia including RAPD (Kafkas and Perl-Treves, 2001; Kafkas and Perl- Treves, 2002; Katsiotis et al., 2003; Golan-Goldhirsh et al., 2004), AFLP (Katsiotis et al., 2003; Golan-Goldhirsh et al., 2004; Kafkas, 2006; Karimi et al., 2009), ISSR (Kafkas, 2006), SSR, SRAP (Talebi et al., 2012), IRAP (Ghaemmaghami et al., 2013) and
restriction analysis of chloroplast fragments (Parfitt and Badenes, 1997) in order to resolve the phylogenetic relationships.
Three restriction enzymes ( Hha I , BstU I, and Mbo I) were used in
restriction analysis.
The primers were synthetized by Bioneer Corporation, South Korea, and all other reagents used in PCR and
restriction analysis were purchased by Fermentas, Lithuania, part of Thermo Fisher Scientific.
The isolates from lungs, kidney, heart, intestine, liver, and bone marrow all harbored the same virulence-associated factors (iucD, colV, iss, mat, fimC, ompA, traT crl, csgA vgrG, and hcp), yielded the same band pattern in amplified ribosomal DNA
restriction analysis, and were allocated to the E coli Reference Collection group B1.
The
restriction analysis by PstI of the positive PCR samples further subcategorized into two genotypes (Fig.