[Association study of CNR1, GAD1 and BDNF polymorphisms with male heroin dependence in the Dai population in Yunnan].

In order to analyze the association of CNR1(Cannabinoid receptor 1), GAD1(Glutamate decarboxylase 1), and BDNF(Brain-derived neurotrophic factor) polymorphisms with male heroin dependence in the Dai population in Yunnan Province, an eight-SNP co-amplification protocol was established to genotype on the SNaPshot platform. A case-control study was performed with 8 SNPs from CNR1, GAD1, and BDNF genes in 165 heroin-dependent males and 170 healthy males of the Dai population. Statistical analyses were conducted with SPSS17.

[DNA polymorphism detection of Papaver somniferum L using fluorescent amplified fragment length polymorphism].

Objective: To detect DNA polymorphism of Papaver somniferum L using fluorescent Amplified Fragment Length Polymorphism.

Methods: Genomic DNA was isolated using the AxyPrep DNA Kit, double-digested by two restrictional endonucleases (Eco RI and Mse I) and ligated to oligonucleotide adapters. After Pre-amplification and selective amplification, the DNA fragments were separated by capillary electrophoresis using the CEQ8000 DNA Fragment Analyzer.

[The polymorphism of Y chromosome and mtDNA distribution among two Bai populations].

In the same ethnic group, people residing at different places may have genetic difference. The difference can be the results of migration and admixture events happened in history. To clarify the genetic relationship and micro-evolution of two Bai ethnic populations residing in Yunnan and Hunan province respectively,we investigated their genetic difference from paternal and maternal genealogy with six other ethnic groups as outgroups.

[Principal component analysis of Y-chromosome haplotype distribution in 18 ethnic groups in Yunnan Province].

Based on the historical records, 18 of the 26 ethnic groups in Yunnan Province are the descendant populations of three ancient tribes, Bai-Yue, Bai-Pu and Di-Qiang, linguistically belonging to the Daic, Austro-Asiatic and Tibeto-Burman, respectively. In order to trace the origins of these native ethnic groups, a total of 13 East Asian specific Y-chromosome biallelic markers were used to study the genetic structure of 20 local populations covering all the 18 ethnic groups in Yunnan Province. Haplotypes were analysis by PCR-RFLP method.

[Gene frequencies of 4 STR loci in Tibetan population of Yunnan province].

Objective: To investigate the gene frequencies of 4 STR loci in Tibetan population of Yunnan.

Methods: Multiple polymerase chain reaction (PCR), denaturing polyacrylamide gel electrophoresis and silver staining were used to detect D21S11, D8S1179, D16S539 and LPL loci. DNA samples collected from 105 unrelated Tibetan individuals in Yunnan province were analyzed.