Development of the nine X-STR loci typing system and genetic analysis in three nationality populations from China.
This study is to develop a new multiplex polymerase chain reaction (PCR) system that simultaneously amplifies the nine X-chromosome short tandem repeats loci in the same PCR reaction, and to explore their polymorphism and mutation rate among three nationality populations from China. These loci included DXS6854, DXS9902, DXS6809, GATA172D05, HPRTB, DXS7423, DXS6807, DXS8378, and DXS8377. The samples of 890 (484 males and 406 females) unrelated individuals from Guangdong Han population, Xinjiang Uigur, and Inner-Mongolia Mongol were successfully analyzed using this multiplex system. The allele frequencies and mutation rates of the nine loci were investigated, and the comparison of allele frequency distribution among different populations was performed. There were 87 alleles for all the loci, and six to 18 alleles for each locus observed by our new multiplex PCR system. Polymorphism information content was 0.4998-0.9101, and power of discrimination in females was 0.6518-0.9846. Five cases with mutation of above loci were detected in 5,310 meioses. Pair-wise comparisons of allele frequencies distribution showed significant differences for most loci among different populations. Our results indicate that this multiplex system is very useful for identification analysis, and that the information about polymorphism and mutation rate is necessary for forensic application in three nationality populations from China.
Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan 2nd Road, Guangzhou, 510080, People's Republic of China.
Qiu-Ling
QL
Liu
De-Jian
DJ
Lu
Xin-Guo
XG
Li
Hu
H
Zhao
Jian-Miao
JM
Zhang
Yun-Ke
YK
Lai
Ye-Fei
YF
Chen
D002681:China; D041321:Chromosomes, Human, X; D016172:DNA Fingerprinting; D005006:Ethnicity / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D006801:Humans; D008297:Male; D009154:Mutation; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic; D020080:Tandem Repeat Sequences