Inherited genetic variation has a critical but as yet largely uncharacterized role in human disease . here we report a public database of common variation in the human genome : more than one million single nucleotide polymorphisms snps for which accurate and complete genotypes have been obtained in 269 dna samples from four populations , including ten 500 - kilobase regions in which essentially all information about common dna variation has been extracted 我们现在发表一个人类基因组常见遗传变异的公开资料库：这是一个对来自四个群体269个样品内的一百万个单核苷酸多态性( snps )进行了完整并准确的分析的研究成果；另外也确认了十个dna片段(每个片段含有五十万个碱基)的所有常见遗传变异资讯。
