Objective: To screen specific SNPs loci of Mentha haplocalyx and Mentha spicata,and then specific primers were designed to identify the two species and their mixture rapidly.
Methods: PsbA-trnH sequences of Mentha haplocalyx and Mentha spicata were obtained by PCR product sequencing and downloading from GenBank. SNPs in the psbA-trnH sequences of Mentha haplocalyx and Mentha spicata were found by ClustulW program and Bioedit software. Primers for authentication of the two species were designed according to the SNP loci, and PCR reaction system was optimized to identify the original plants.
Results: Multi-PCR reaction system was constructed. The 181 bp identification band for Mentha haplocalyx or(and) 288 bp identification band for Mentha spicata could be produced by a single PCR reaction,which showed good identification ability to the two species.
Conclusion: The multi-PCR reaction system can be applied to identify Mentha haplocalyx and Mentha spicata as well as their mixture.