近亲婚配是遗传病蔓延的“良好土壤”,在人类遗传学上具有重要的意义。因为近亲的个体携带相同有害等位基因的机会较非近亲者多,所以在子女中,常染色体隐性遗传缺陷发生率比非近亲婚配者高出14.4倍,给家庭和社会都带来了不幸。为了提高人口质量,改善人民素质,为防止近亲结婚提出理论依据,我们于1982年4～6月对宁夏回族人集居的泾源县泾北公社近亲婚 Inbreeding is a “good soil” for the spread of genetic disease and has important implications in human genetics. As close relatives have more chances of carrying the same unwanted allele than non-close relatives, the incidence of autosomal recessive defects among children is 14.4 times higher than that of non-relatives and brings misfortune to both families and society . In order to improve the quality of the population, improve the quality of the people, and to provide a theoretical basis for preventing the marriage of relatives, we married the Hui people in Jingyuan County, Jingbei Commune, who lived in Ningxia from April to June, 1982,