辽宁锡伯族和汉族睫毛与蒙古褶两种遗传性状的基因频率

The Gene Frequency of Eyelash and Mongolia Wrinkle in Xibo and Han Nationalities in Liaoning

目的对辽宁锡伯族和汉族睫毛与蒙古褶(内眦褶)两种遗传性状的基因频率及其分布进行研究,为人类群体遗传学研究提供资料。方法观察受试者睫毛的长度及蒙古褶的有无。睫毛长度在8mm以上是常染色体显性遗传;长度在5mm以下是常染色体隐性遗传。蒙古褶即上眼皮在眼内角向下延伸形成的皱褶,有蒙古褶的是常染色体显性遗传,没有蒙古褶的是常染色体隐性遗传。结果辽宁锡伯族和汉族短睫毛出现率分别为32.76%和19.70%,隐性基因频率分别为0.5724和0.4439;蒙古褶为无的出现率分别为15.41%和5.42%,隐性基因频率分别为0.3925和0.2328。结论两民族两种遗传性状的出现率性别间均无显著差异,锡伯族短睫毛和蒙古褶为无的出现率明显高于辽宁汉族,与其他群体相比较,辽宁锡伯族短睫毛出现率处于中间水平,而蒙古褶为无的出现率较高。

Objective To study the distribution of gene frequency of two kinds of genetic traits including eyelash and Mongolia wrinkle （ inner eanthus wrinkle） in Xibo and Han nationalities of Liaoning to provide data for genetic of human Anthropology. Methods To observe the length of eyelash and the existence of Monglia wrinkle. The eyelash longer than 8 mm belongs to autosomal dominant inheritance, eyelash shorter than 5 mm belongs to autosomal recessive inheritance. Mongolia wrinkle （down from the up eyelid＇ s internal angle） belongs to autosomal dominant inheritance, non Mongolia wrinkle belongs to autosomal recessive inheritance. Results The frequencies of short eyelash in Liaoning Xibe and Han nationalities were 32.76% and 19.70% respectively, the gene frequencies of autosoreal recessive inheritance were 0. 5724and 0. 4439 respectively. The frequencies of non Mongolia wrinkle were 15. 41% and 5.42%, the frequencies of autosomal recessive inheritance were 0.3925 and 0. 2328 respectively. Conclusion No significant sexual difference was found in the frequencies of two genetic traits between the two nationalities compared with Liaoning Han nationalities, Liaoning Xibe nationality has a higber frequency of short eyelash and no Mongolia wrinkle. Compared with other populations, Liaoning Xibo nationality has a middle frequency for short eyelash and a higher frequency for non Mongolia wrinkle.