Allele Frequencies of 13 Chromosome X STR in Arab Iraqi Population

Abstract

Short tandem repeat (STR) markers are highly being used for identification of human being in addition to
paternity and other forensic cases.The X-chromosome STR (X-STR) markers are a powerful supplementary
system particularly in deficiency paternity analysis. Several X-linked microsatellites have been assessed but
more studies are necessary to verify the population statistics. In our study, we report allele frequencies of 13
X-linked microsatellites (DXS8378, DXS9898, DXS8377, HPRTB, GATA172DO5, DXS7423, DXS6809,
DXS7132, DXS101, DXS6789, DXS9902, DXS6807, and DXS7424) in the Iraqi arab population. fifty
Blood samples were collected from healthy unrelated males. A total number of alleles were detected for for
all 13 X-STR loci were ( 83 ) and the related frequencies ranging from 0.0200 to 0.5000. Heterozygosity
ranged from 0.652 to 0.858. Large values were observed, at least 0.999999994, in combined powers of
discrimination. The results powerfully suggest that all the X-linked microsatellites defined here can possibly
support the autosomal systems that used in parentage analysis and different forensic case work.