Spanish and Portuguese-speaking Working Group of the International Society for Forensic Genetics

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Y-tetraplexes. Population data

Gusmão L., Sánchez-Diz P., Alves C., Quintáns B., García-Poveda E., Geada H., Raimondi E., Silva de la Fuente S. M., Vide M. C., Whittle M. R., Zarrabeitia M.T., Carvalho M., Negreiros V., Prieto Solla L., Riancho J. A., Campos-Sánchez R., Vieira-Silva C., Toscanini U., Amorim A., Carracedo A.; GEP-ISFG.( Aug 2003).

Results of the GEP-ISFG collaborative study on the Y chromosome STRs GATA A10, GATA C4, GATA H4, DYS437, DYS438, DYS439, DYS460 and DYS461: population data. Forensic Science International (2003) 135(2): 150-157.

The Spanish and Portuguese ISFG Working Group (GEP-ISFG) carried out a collaborative exercise in order to asses the performance of two Y chromosome STR tetraplexes, which include the loci DYS461, GATA C4, DYS437 and DYS438 (GEPY I), and DYS460, GATA A10, GATA H4 and DYS439 (GEPY II). The groups that reported correct results in all the systems were also asked to analyse a population sample in order to evaluate the informative content of these STRs in different populations. A total of 1020 males out of 13 population samples from Argentina, Brazil, Costa Rica, Macao, Mozambique, Portugal and Spain were analysed for all the loci included in the present study. Pairwise haplotype analysis showed the relative homogeneity of the Iberian origin samples, in accordance with what was previously found in the European populations for other Y-STR haplotypes (

As expected, the four non-Caucasian samples, Macao (Chinese), Mozambique (Africans), Costa Rica (Africans) and Argentina (Lara, Amerindians), show highly significant Fst values in the pairwise comparisons with all the Caucasian samples.

Haplotype and allele frequencies of these eight Y-STRs were estimated in all samples. The lowest haplotype diversity was

found in the Lara (Argentina) population (95.44%) and the highest (99.90%) in Macao (China).

FSI 135 Y tetrapexes-population-data