Polymorphisms of mitochondrial DNA hypervariable regions HVR I and HVR II in Changdu Tibetan in China.
- Author:
Jianmin ZHAO
1
;
Longli KANG
;
Liqiang BIAN
;
Zong LA
Author Information
- Publication Type:Journal Article
- MeSH: Asian Continental Ancestry Group; genetics; Base Sequence; DNA, Mitochondrial; genetics; Ethnic Groups; genetics; Female; Genetic Variation; Genomics; Haplotypes; Humans; Male; Molecular Sequence Data; Mutation; Polymorphism, Genetic; Sequence Analysis, DNA; Tibet
- From: Chinese Journal of Medical Genetics 2008;25(5):588-592
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo analyze the sequence polymorphisms of mitochondrial DNA HVR I and HVR II in Tibetan population in Changdu area of Tibet.
METHODSmtDNAs obtained from 97 unrelated individuals were amplified and directly sequenced.
RESULTSOne hundred and eleven variable sites were identified, including nucleotide transitions, transversions, insertions and deletions. In HVR I region (nt16024-nt16365), sixty-eight polymorphic sites and 92 haplotypes were observed, and the genetic diversity was 0.9985. In HVR II region (nt73-nt340), forty-three polymorphic sites and 91 haplotypes were detected, and the genetic diversity was 0.9882. The random match probability of HVR I and HVR II regions were 0.0120 and 0.0118, respectively. When the sequence analysis of HVR I and HVR II regions were combined, ninety-seven different haplotypes were found. The combined match probability of two unrelated persons having the same sequence was 0.0103.
CONCLUSIONThere are some unique polymorphic loci in the Changdu Tibetan population. The results suggest that there are significant difference in the genetic structure in the mitochondrial DNA D-loop region between Changdu Tibetans and other Asian populations and Caucasians. Sequence polymorphism in mitochondrial DNA HVR I and HVR II can be used as a genetic marker for forensic individual identification and genetic analysis.
