The screening of 13 short tandem repeat loci in the Chinese population

James Chun I. Lee, Chia Hwei Chen, Li Chin Tsai, Adrian Linacre, Jan Gowth Chang

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Population studies of 13 short tandem repeat (STR) loci were carried out on Chinese in Taiwan. The STR loci included HUMF13B, HUMF13A01, HUMFES/FPS, HUMFABP, HUMPLA2A1, HUMTPOX, HUMTH01, HUMVWFA31/A, HUMCSF1PO, HUMLPL, HUMGPP3A09, HUMCYAR04 and HUMCD4. DNA samples from 100 unrelated individuals were screened. The STR allele patterns were detected by the fluorescence detector of an automated DNA sequencer. Two PCR amplifications were performed for each STR locus in this study. The first PCR amplification strategy used 26 base pairs of the T7 sequence extension in the 5' end of the forward primer of each STR locus. The second PCR amplification used a dye-labeled T7 primer instead of the forward primer in the first PCR amplification, and the first PCR products as template to produce fluorescent dye-labeled PCR products. PCR products of different STR loci with overlapping allele sizes could be detected in the same lane of the polyacrylamide gel on an automated DNA sequencer using different colored dye-labeled T7 primers. There was no need to directly conjugate the fluorescent dye to individual STR primers. The PCR products were obtained using 2 ng of template DNA in 25 μl of PCR reaction mixture. No deviations from the Hardy-Weinberg equilibrium were observed for the 13 STR loci. The distributions of these STR alleles were different from those of Caucasians or Blacks. The probability of matching from the Combination of the 13 STR loci was 5.9 X 10 -10for ou Chinese population. However, HUMF13B, HUMLPL and HUMCD4 loci were not as highly polymorphic as observed in other populations.

Original languageEnglish
Pages (from-to)137-144
Number of pages8
JournalForensic Science International
Volume87
Issue number2
DOIs
Publication statusPublished - 6 Jun 1997
Externally publishedYes

Keywords

  • Dye-labeled T7 primer
  • Polymerase chain reaction
  • Short tandem repeat

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