The integrative relationship between population genetics and forensic biology allows for a thorough genetic characterization of extant human populations. This study aimed to genetically characterize 150 unrelated healthy donors from a general population in Iran both forensically and phylogenetically. The allelic frequencies of 15 STR loci (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D19S433, vWA, TPOX, D18S51, D5S818 and FGA) were generated. This constitutes the core of polymerase chain reaction (PCR)-based DNA genetic markers in the US Combined DNA Index System (CODIS) plus two additional loci (D2S1338 and D19S433) that together are consistent with several other worldwide database requirements. There were no deviations from Hardy-Weinberg expectations. Based upon the allelic frequencies, several important forensic parameters were calculated including: gene diversity (GD) index, power of discrimination (PD), polymorphic information content (PIC) and power of exclusion (PE). G-tests indicate the allelic frequencies of the Iranians are statistically non-significant compared to two Turkish populations yet, statistically different from the remaining 18 groups obtained from the literature and examined in this study. This suggests that the Iranian dataset may be forensically equivalent to the dataset from the Turkish region of Eastern Anatolia and the general population from Turkey. Phylogenetic analysis of our population with the full set of 15 loci indicate the Iranians occupy an intermediate position relative to the major Caucasian and East Asian clades on a global level. A regional phylogenetic analysis using 13 of the 15 loci indicate the Iranians segregate in a more compact association with groups from southeastern Spain, Arabs from Morocco and Syria, and especially with the general population from Turkey and those from Eastern Anatolia. These groups are flanked by highly differentiated populations from northern India and a Berber group from Tunisia on opposing ends of the regional phylogram. This report also demonstrates the necessity to thoroughly characterize the genetic composition of populations located in geographic intersections in order to choose the appropriate dataset on which to base forensic calculations, not only at an intra-population level, but also at an inter-population level as well.

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   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:15998573
   |texte=   Iranian STR variation at the fringes of biogeographical demarcation.
}}

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