Amplification was performed in a PTC-100 thermocycler that was programmed for an initial denaturation at 95 °C for 4 min; followed by 35 cycles at 94 °C for 45 s, 55 °C (trnL intron) or 60 °C (psbB-psbF and trnL-trnF) for 1 min, and 72 °C for 30 s; and a final extension at 72 °C for 10 min. The PCR products were sequenced in both directions using the primers for the amplification reactions and the ABI PRISM 3730 DNA sequencer.