DNA的提取和PCR扩增是分子生物学最基本的操作步骤之一。本文以贝母为研究对象,探讨不同DNA提取方法、不同扩增条件对PCR产物的影响,为生药的分子生物学鉴定提供参考贝母的分子生物学鉴定方法的研究@蔡朝晖@李萍@董婷霞@詹华强 DNA extraction and PCR amplification are one of the most basic steps in molecular biology. This article takes Fritillaria as the research object, discusses the effects of different DNA extraction methods and different amplification conditions on the PCR products, and provides a reference for molecular biology identification of crude drugs. Fructus Mica molecular biological identification method research Cai Zhaohui @ Li Ping @ Dong Tingxia @ Zhan Huaqiang