Polymorphisms of 23 Y-chromosome STR Loci in A Han Population in Jiangsu Province.

Objective To investigate the polymorphisms of 23 Y-STR loci in a Han population in Jiangsu province. Methods Blood samples were collected from 4821 unrelated healthy Han males in Jiangsu province. DNA templates were amplified by PowerPlex Y23 kit,and the amplification products were detected by 3500xL genetic analyzer.

[Polymorphism of 17 short tandem repeat Loci of Tibetan minority ethnic group from Lhasa].

Objective: To investigate the polymorphism of 17 short tandem repeat (STR) loci of Tibetan minority ethnic group from Lhasa.

Methods: Blood samples were obtained from 132 unrelated Tibetan individuals from Lhasa. DNA templates were screened by home-made AGCU17+1 kit and 3130XL genetic analyzer.

[Comparative research of the influence factors of DNA extraction of bloodstain on the filter paper with Chelex-100 method].

Objective: To improve DNA extraction from bloodstain on the filter paper and to establish a rapid, simple, and cost-effective method for DNA extraction suitable for database construction.

Methods: Seven hundred and fifty two aged bloodstains on filter paper were randomly divided into four groups. The four different DNA extraction methods were compared with each other, and two DNA extraction methods used for 63 fresh bloodstains on filter paper were also compared with each other.