Figure 4

Gel electrophoresis of PCR amplification results of Pterocarpus authentic wood samples using different extraction methods, (a,b) SDS-based method, (c,d) QIAGEN method, and (e,f) CCDB method. Red arrows indicate the amplicons of ITS2 (180 bp). Blue arrows indicate the amplicons of matK (200 bp). Yellow arrows indicate the amplicons of rbcL (250 bp). Green arrows indicate the amplicons of ndhF-rpl32 (167–173 bp).