The faecal DNA obtained was sufficiently pure to support reliable amplification, and was applied as template DNA to amplify a portion of the giant panda brain derived neurotrophic factor ( BDNF) gene and mitochondrial cytochrome b gene. 本实验PCR扩增了大熊猫脑源性神经营养因子(BDNF)基因和线粒体细胞色素b基因片段,并进行测序分析,证实了提取的可靠性。