*3.4. DNA Extraction and Quality Check*

Total genomic DNA was extracted from the silica-dried leaves of *L. yunnanensis* with a plant genomic DNA extraction kit containing RNase A (TransGen, Beijing, China), following the manufacturer's protocol. The integrity and quality of the genomic DNA was checked using 0.8% agarose gel electrophoresis. The DNA purity and concentration were determined using a NanoDrop 2000 spectrophotometer (Thermo Fisher Scientific, Wilmington, DE, USA), and samples were stored at −20 ◦C until used for SSR amplification.
