一些案件中指纹和掌纹蕴藏着重要的信息,以往常常因为残缺不能满足形态学比对要求而丧失证明价值。随着DNA分析技术的进步,对汗潜指纹和掌纹中脱落细胞进行基因分型成为可能。但由于提取DNA量极少,属于低拷贝模板(low copy number,LCN)[1],提高分型成功率成为研究的难点和热点 In some cases, fingerprints and palm prints contain important information that in the past often failed to meet the requirements of morphological match because of incompleteness and loss of proof value. With advances in DNA analysis technology, it is possible to genotype exfoliated cells in sweat latent fingerprints and palm prints. However, due to the small amount of extracted DNA, which belongs to low copy number (LCN) [1], increasing the success rate of typing becomes a research hotspot