title: [Genetic polymorphism of D6S477, D9S1118, D18S865, D19S400, and D20S161 short tandem repeat loci in Qingdao Han population].
abstract: OBJECTIVE
  To illuminate the preliminary genotype and allele frequency distribution of D6S477 and the other four short tandem repeat(STR) loci in Chinese Han population in Qingdao area and to probe the possibility of their genetic application.
  
  
  METHODS
  Two hundred ACD-blood specimens were collected from the unrelated individuals in Qingdao. The DNA samples were extracted with Chelex method and were amplified by polymerase chain reaction technique. The PCR products were analyzed by polyacrylamide gel electrophoresis and displayed using silver staining.
  
  
  RESULTS
  The authors obtained the allele frequency distribution and preliminary genotype of D6S477, D9S1118, D18S865, D19S400 and D20S161 STR loci. No deviation from Hardy-Weinberg equilibrium was observed in the five loci.
  
  
  CONCLUSIONS
  All the five loci have higher chance of exclusion and discriminating power, and they will be useful markers for researches in genetics.
authors.affiliation: Department of Medical Genetics, Qingdao Research Institute for Family Planning, Qingdao, Shandong, 266071 PR China.
authors.forename: Qi-wei
authors.initials: QW
authors.lastname: Qi
authors.forename: Hong-yan
authors.initials: HY
authors.lastname: Zhang
authors.forename: Yun-fei
authors.initials: YF
authors.lastname: Chang
authors.forename: Li
authors.initials: L
authors.lastname: Xu
authors.forename: Shou-zhong
authors.initials: SZ
authors.lastname: Ma
mesh_terms: D044466:Asian People / Q000235:genetics; D002681:China; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D015810:Linkage Disequilibrium; D018895:Microsatellite Repeats / Q000235:genetics*; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic