Schröer K, Schmitt C, Staak M. Analysis of the co-amplified STR loci D1S1656, D12S391 and D18S51: population data and validation study for a highly discriminating triplex-PCR.
Forensic Sci Int 2000;
113:17-20. [PMID:
10978594 DOI:
10.1016/s0379-0738(00)00244-9]
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Abstract
A multiplex-PCR composed of the three highly variable STR loci D1S1656, D12S391 and D18S51 has been established. The non-overlapping fragment sizes allow allele detection using a monochrome automated laser fluorescent sequencer (A.L.F. express, Pharmacia Biotech). The typing results of the triplex-PCR showed no difference to those of singleplex-PCR. Allele frequencies were determined in a Western German population of 228 individuals from Cologne. The heterozygosities and exclusion chances (D1S1656, 0.982; D12S391, 0.979; D18S51, 0.97) are very high compared to other short tandem repeats used for forensic applications. No deviations from the Hardy-Weinberg equilibrium were found. Successful typing of DNA amounts down to 50-100 pg is possible. Mixtures of up to 1:10 can be identified. In conclusion, the high combined exclusion chance due to the well-balanced allelic distribution and its high sensitivity make this triplex-PCR a valuable tool for forensic casework.
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