Paternity Testing Research Today is a free monthly online journal that collates and summarizes the latest research about Paternity Testing, including details on accuracy, methods, procedure, dna testing. | ||||||
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Allele Frequency of VNTR Locus D1S80 Observed in Denizli Province of Turkey.Köseler A, Atalay A, Atalay EO Department of Biophysics, Faculty of Medicine, Pamukkale University, Denizli, Turkey, akoseler@pau.edu.tr. The variable numbers of tandem repeats (VNTR) locus D1S80, located on chromosome 1 (1p35-36), has a repeat unit 16 bp in length, and different numbers of these repeat units have been observed for populations of different origins and ethnicity. We used a molecular identification method based on capillary electrophoresis separation to analyze D1S80 locus polymorphism among 74 subjects from Denizli province, Turkey, finding an amplified fragment length size of 379-635 bp. Allele repeat numbers were deduced from these sizes and sequence comparison. The most common alleles were repeat units 24 (34.3%) and 18 (22.4%), with frequencies of 0.414 and 0.207, respectively. Other alleles were 25 (7.86%), 28 (5.71%), 22 (4.25%), and 29 (2.86%). The allele with 23 repeat units was not observed. Results were in Hardy-Weinberg linkage disequilibrium. Observed heterozygosity was 0.614, and expected heterozygosity was 0.787. Theta(k) value was 4.86 (95% confidence interval limits). Capillary electrophoresis is a powerful approach for accurate identification of VNTR loci, especially for low base pair units like D1S80, for prenatal diagnosis, linkage analysis, forensic identification, paternity testing, anthropological research, and phylogenetic studies. Published 8 June 2009 in Biochem Genet. Articles on Paternity Testing published 4 June 2009: In a minority of mammalian species, including humans, fathers play a significant role in infant care. Compared to maternal behavior, the neural and hormonal bases of paternal care are poorly understood. We analyzed behavioral, neuronal and neuropeptide responses towards unfamiliar pups in biparental California mice, comparing males housed with another male ("virgin males") or with a female before ("paired males") or after ("new fathers") the birth of their first ... [Abstract] [Full-text] Articles on Paternity Testing published 1 June 2009: Pollinator visitation patterns strongly influence among-flower variation in selfing rate. Ann Bot (Lond), 103(9): 1379-83. BACKGROUND AND AIMS: Adjacent flowers on Mimulus ringens floral displays often vary markedly in selfing rate. We hypothesized that this fine-scale variation in mating system reflects the tendency of bumble-bee pollinators to probe several flowers consecutively on multiflower displays. When a pollinator approaches a display, the first flower probed is likely to receive substantial outcross pollen. However, since pollen carryover in this species is limited, receipt of self pollen should increase ... [Abstract] [Full-text] Articles on Paternity Testing published 15 May 2009: Inferring unknown genotypes of sires at codominant deoxyribonucleic acid markers in half-sib families. J Anim Sci, 87(6): 1872-82. Deoxyribonucleic acid from sires is usually not available from experiments aimed at QTL mapping for traits of the dam in cow-calf operations and free range sheep populations. In this study, methods to reconstruct sire genotypes using genotype information from large half-sib progeny were developed. The methods are based on 1) all offspring genotypes are compatible with more than 1 genotype for the sire, but 1 of the genotypes is more likely than the others when comparing the proportion of the ... [Abstract] [Full-text] Articles on Paternity Testing published 7 May 2009: Heterozygosity and extra-pair paternity: biased tests result from the use of shared markers. Mol Ecol, 18(9): 2010-21. Recent studies of extra-pair paternity have found support for the idea that heterozygous males have an advantage in siring offspring. Most studies use DNA microsatellite loci to determine paternity and then use the same loci to estimate individual heterozygosity. However, because the likelihood of detecting extra-pair offspring depends on the combinations of parental alleles, it is possible that biases arise from particular allele combinations. This might produce false support for the influence ... [Abstract] [Full-text] Articles on Paternity Testing published 30 March 2009: Sequence alterations in the YBX2 gene are associated with male factor infertility. Fertil Steril, 91(4): 1090-5. OBJECTIVE: To investigate YBX2 gene alterations in men with severe defects in spermatogenesis, including azoospermia or severe oligozoospermia, and protamine deregulation. MSY2 has been identified as a central component in the regulation of spermatogenesis in mice, but the potential role of its human orthologue, YBX2 or "Contrin," in human infertility is not known. DESIGN: A prospective cohort study. SETTING: University infertility clinic and associated research laboratory. ... [Abstract] [Full-text] Articles on Paternity Testing published 27 March 2009: Plastic responses of male Drosophila melanogaster to the level of sperm competition increase male reproductive fitness. Proc Biol Sci, 276(1662): 1705-11. Evolutionary and plastic responses by males to the level of sperm competition (SC) are reported across widespread taxa, but direct tests of the consequences for male reproductive success in a competitive context are lacking. We varied male perception of SC to examine the effect on male competitive reproductive success and to test whether the outcomes were as predicted by theory. Exposure to rival males prior to mating increased a male's ejaculate investment (measured as mating duration); by ... [Abstract] [Full-text] Consistent male-male paternity differences across female genotypes. Biol Lett, 5(2): 232-4. In a recent paper, we demonstrated that male-female genetic relatedness determines male probability of paternity in experimental sperm competition in the Peron's tree frog (Litoria peronii), with a more closely related male outcompeting his rival. Here, we test the hypothesis that a male-male difference in siring success with one female significantly predicts the corresponding difference in siring success with another female. With male sperm concentration held constant, and the proportion of ... [Abstract] [Full-text] Articles on Paternity Testing published 24 March 2009: Dead man talking: sustained utility of data from archaic paternity tests. Transfusion. BACKGROUND: Almost all relationship analysts now use molecular (DNA) tests to obtain necessary genetic information, yet older blood group tests remain valid. Circumstances may provide blood test results from old reports to avoid trying to sample DNA from inaccessible sources. CASE STUDY: A mother recently claimed that a deceased man (alleged father [AF]) sired her child. Insurance investigation recovered two paternity test reports from an AABB-accredited laboratory. The 16- and 18-year-old ... [Abstract] [Full-text] © 2004-2009 Paternity Testing Research Today. All Rights Reserved. |
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