[Genetic polymorphisms of three loci and implication to forensic medicine].
OBJECTIVE
To obtain population genetic data of short tandem repeat (STR) locus D2S1327, D1S1390, and D11S2008 and to investigate the disparity of allelic frequency distributions among populations from different regions.


METHODS
Blood samples of 300 unrelated individuals from Chengdu (Han), Bangkok (Thai) and Maint (Germany) were taken and analyzed with single PCR, polyacrylamide gel electrophoresis and silver staining.


RESULTS
In the three loci, 9, 6, and 8 alleles and 32,14, and 22 genotypes were found respectively. The observed heterozygosity of 79%-82%, 63.0%-74.3%, and 72.0%-74.3% and discrimination power of 87.8%-92.6%, 79.6%-82.5%, and 87.6%-89.0% were identified for the three loci respectively. The genotype distributions of the three loci in the three populations fitted well with Hardy-Weinberg equilibrium. There was no significant difference in allelic frequency distributions among the three populations.


CONCLUSIONS
The methods described in this paper are easy to perform and have high sensitivities. The discrimination power and exclusion chances of these three loci are desirable for forensic analysis and application.
Liu
Zhi-Yong
ZY
West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China.
Zhang
Bao-Hua
BH
Zhu
Yin-Hua
YH
Chen
Guo-Di
GD
Yu
Lin
L
Han
Jun-Ge
JG
Lü
Mei-Li
ML
Zhang
Lin
L
D002681:China; D005554:Forensic Medicine; D005787:Gene Frequency; D005828:Genetics, Population; D005838:Genotype; D006801:Humans; D018895:Microsatellite Repeats / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics*