DNA Extraction and Concentration Identification
Genomic DNA was extracted from needles using a Plant Genomic DNA Kit
(AG, Hunan, China). The quality and quantity of DNA were analyzed by
agarose gel electrophoresis. Extracted DNA was quantified
spectrophotometrically (Nanodrop), diluted to 5 ng/µl, and cryopreserved
at -20℃.