[Polymorphisms of 11 Y-chromosomal short tandem repeat loci in Chongqing Tujia ethnic group and genetic relationships with 16 populations].
OBJECTIVE
To investigate the genetic polymorphisms of 11 Y-chromosomal short tandem repeats (STR) loci in Chongqing Tujia population, and to evaluate their forensic application values and genetic relationships with the other 16 populations of China.


METHODS
Eleven Y-STR loci in 215 unrelated Tujia individuals from Chongqing were amplified with PowerPlex Y System, and the PCR products were analyzed by 310 Genetic Analyzer. Cluster analysis and phylogenic trees were applied to show the genetic distance among the populations.


RESULTS
A total of 195 haplotypes were identified and the overall haplotypes diversity for the 11 Y-STR loci was 0.9942. The gene diversity values (GD) for each locus ranged from 0.3757 (DYS391) to 0.9170 (DYS385a/b). Comparing with other 16 populations, the genetic distance between Tujia and Tibetan was the nearest (0.02467), that between the Tujia and Korean ethnic groups was the farthest (0.25350).


CONCLUSIONS
The genetic distribution of the 11 Y-STR loci in Chongqing Tujia population showed favorable polymorphisms. They are suitable for forensic identification and paternity testing in the local area. The study of genetic diversity among different populations is useful in understanding their origins, migrations and their relationships.
Shi
Mei-sen
MS
China University of Political Science and Law, Ministry of Education, Beijing, 100040 People's Republic of China. shimeisen2000@yahoo.com.cn
Bai
Ru-feng
RF
Wan
Li-hua
LH
Yu
Xiao-jun
XJ
D002681:China / Q000208:ethnology; D041322:Chromosomes, Human, Y; D005006:Ethnicity / Q000208:ethnology / Q000235:genetics*; D014644:Genetic Variation; D006801:Humans; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics*; D011110:Polymorphism, Genetic; D044382:Population Groups / Q000235:genetics*