Portuguese Population Study with 16 Y-STR Loci

Geada, Helena; Baptista, Joana; Felgueiras, Miguel; Vieira Da Silva, Cláudia; Cruz, Carla; Lucas, Isabel; Ribeiro, Teresa; Espinheira, Rosa

http://hdl.handle.net/10400.26/44049

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Authors

Geada, Helena

Baptista, Joana

Felgueiras, Miguel

Vieira Da Silva, Cláudia

Abstract(s)

Although autosomal STRs are commonly used for forensic investigations, Y-chromosome STRs provide very useful information in paternity investigation cases without alleged father and investigation cases where paternal lineage identification can be assessed. The aim of this study is to present an extended 16 Y-STR Portuguese Population Database of 214 Southern Portugal individual samples for forensic purpose, including the 8 Y-STR minimal haplotype – DYS19, DYS389 I/II, DYS390, DYS391, DYS392, DYS393, DYS385 (Gusmão et al, 2001, D Syndercomb-Court, personal communication) and Y-STR loci included in the Y-Chromosome GEP-ISFG collaborative exercise – DYS437, DYS438, DYS439, DYS460, DYS461, GATA A10, GATA C4, GATA H4.When performing a 16 Y-STR study the genetic diversity was successfully increased. With the 8 Y-STR minimal haplotype, haplotype clusters can be detected involving several non-related individuals, whereas, with a 16 Y-STR haplotype, haplotype clusters involve only 2 or 3 non-related individuals. The 16 Y-chromosome STR haplotype seem to be extremely important to solve complex forensic cases and in population, studies to obtain unique paternal profiles and to determine specific population characteristics