Harris A
Division of Medical and Molecular Genetics, United Medical School, Guy's Hospital, London.
J Med Genet. 1990 Jan;27(1):39-41. doi: 10.1136/jmg.27.1.39.
Genetic analysis of the CF locus in the British Caucasian population has been extended using six DNA probes detecting nine polymorphic loci. Data are presented on (1) diagnostic usefulness of probes, and (2) allele frequencies for each probe in this population. For the probes pXV2C and KM19 (those closest to the CF locus) allele frequencies are further subdivided into male and female derived chromosomes 7. The allele frequencies for both probes on non-CF bearing chromosomes 7, but not on CF carrying chromosomes 7, are substantially different in males and females. Combined haplotypes for pXV2C and KM19 show that, as has been observed in other northern European populations, almost 90% of CF chromosomes in this population carry the pXV2C/KM19, 1/2 (2.1 kb/6.6 kb) haplo-type.
利用检测9个多态位点的6种DNA探针,对英国白种人群中的囊性纤维化(CF)基因座进行了基因分析扩展研究。本文给出了以下两方面的数据:(1)探针的诊断效用;(2)该人群中各探针的等位基因频率。对于探针pXV2C和KM19(最靠近CF基因座的探针),等位基因频率进一步细分为源自男性和女性的7号染色体。在非携带CF的7号染色体上,这两种探针的等位基因频率在男性和女性中存在显著差异,但在携带CF的7号染色体上则不然。pXV2C和KM19的联合单倍型显示,正如在其他北欧人群中所观察到的那样,该人群中近90%的CF染色体携带pXV2C/KM19,1/2(2.1 kb/6.6 kb)单倍型。