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https://www.readbyqxmd.com/read/29151121/impact-of-several-wearers-on-the-persistence-of-dna-on-clothes-a-study-with-experimental-scenarios
#1
Micaela Poetsch, Manuel Pfeifer, Helen Konrad, Thomas Bajanowski, Janine Helmus
The detection of DNA of a certain person on the inside of a piece of clothing involved in a crime scene is usually seen as confirmation that this person is the owner or bearer and therefore participated in this crime. However, besides the possibilities of secondary or even tertiary transfer of DNA, the accused often argues that he lent the garment to another person who by chance did not leave any DNA while committing the crime. Then, forensic genetic scientists have to answer the question how long DNA persists on an item used in daily routine and how long a piece of clothing must be worn to definitively leave detectable DNA behind...
November 18, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29150717/genetic-diversity-and-phylogenetic-study-of-the-chinese-gelao-ethnic-minority-via-23-y-str-loci
#2
Pengyu Chen, Yanyan Han, Guanglin He, Haibo Luo, Tianzhen Gao, Feng Song, Dengfu Wan, Jian Yu, Yiping Hou
Haplotype diversity for 23 Y chromosomal short tandem repeat (Y-STR) loci included in the PowerPlex(®) Y23 System was analyzed in the Chinese Gelao minority group of 234 unrelated males living in Daozhen Gelao-Miao Autonomous County in Guizhou Province, southwest China. A total of 216 different haplotypes were detected, of which 199 haplotypes were unique. The overall haplotype diversity (HD) and discrimination capacity (DC) were 0.9996 and 0.9231, respectively. The gene diversity (GD) ranged from 0.4159 (DYS438) to 0...
November 17, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/29024923/a-ghep-isfg-collaborative-study-on-the-genetic-variation-of-38-autosomal-indels-for-human-identification-in-different-continental-populations
#3
R Pereira, C Alves, M Aler, A Amorim, C Arévalo, E Betancor, D Braganholi, M L Bravo, P Brito, J J Builes, G Burgos, E F Carvalho, A Castillo, C I Catanesi, R M B Cicarelli, P Coufalova, P Dario, M E D'Amato, S Davison, J Ferragut, M Fondevila, S Furfuro, O García, A Gaviria, I Gomes, E González, A Gonzalez-Liñan, T E Gross, A Hernández, Q Huang, S Jiménez, L F Jobim, A M López-Parra, M Marino, S Marques, G Martínez-Cortés, V Masciovecchio, D Parra, G Penacino, M F Pinheiro, M J Porto, Y Posada, C Restrepo, T Ribeiro, L Rubio, A Sala, A Santurtún, L S Solís, L Souto, E Streitemberger, A Torres, C Vilela-Lamego, J J Yunis, I Yurrebaso, L Gusmão
A collaborative effort was carried out by the Spanish and Portuguese Speaking Working Group of the International Society for Forensic Genetics (GHEP-ISFG) to promote knowledge exchange between associate laboratories interested in the implementation of indel-based methodologies and build allele frequency databases of 38 indels for forensic applications. These databases include populations from different countries that are relevant for identification and kinship investigations undertaken by the participating laboratories...
September 22, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28983069/fine-scale-genetic-structure-in-finland
#4
Sini Kerminen, Aki S Havulinna, Garrett Hellenthal, Alicia R Martin, Antti-Pekka Sarin, Markus Perola, Aarno Palotie, Veikko Salomaa, Mark J Daly, Samuli Ripatti, Matti Pirinen
Coupling dense genotype data with new computational methods offers unprecedented opportunities for individual-level ancestry estimation once geographically precisely defined reference data sets become available. We study such a reference data set for Finland containing 2376 such individuals from the FINRISK Study survey of 1997 both of whose parents were born close to each other. This sampling strategy focuses on the population structure present in Finland before the 1950s. By using the recent haplotype-based methods ChromoPainter (CP) and FineSTRUCTURE (FS) we reveal a highly geographically clustered genetic structure in Finland and report its connections to the settlement history as well as to the current dialectal regions of the Finnish language...
October 5, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28946114/applying-massively-parallel-sequencing-to-paternity-testing-on-the-ion-torrent-personal-genome-machine
#5
Hui Li, Xueying Zhao, Ke Ma, Yu Cao, Huaigu Zhou, Yuan Ping, Chengchen Shao, Jianhui Xie, Wenbin Liu
Massively parallel sequencing (MPS) is a promising supplementary method for forensic genetics and has gradually been applied to forensic casework. In this study, we applied MPS to forensic casework on an Ion Torrent Personal Genome Machine to evaluate its performance in paternity testing with mismatched STR loci. A total of 15 samples from seven cases containing one mismatched locus by capillary electrophoresis typing were analyzed. Combined paternity index (CPI) and relative chance of paternity were calculated according to the International Society for Forensic Genetics guidelines and the Chinese national standards recommended for paternity testing...
September 12, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28938152/comparison-of-manual-and-automated-ampliseq%C3%A2-workflows-in-the-typing-of-a-somali-population-with-the-precision-id-identity-panel
#6
Suzanne van der Heijden, Susanne Juel de Oliveira, Marie-Louise Kampmann, Claus Børsting, Niels Morling
The Precision ID Identity Panel was used to type 109 Somali individuals in order to obtain allele frequencies for the Somali population. These frequencies were used to establish a Somali HID-SNP database, which will be used for the biostatistic calculations in family and immigration cases. Genotypes obtained with the Precision ID Identity Panel were found to be almost in complete concordance with genotypes obtained with the SNPforID PCR-SBE-CE assay. In seven SNP loci, silent alleles were identified, of which most were previously described in the literature...
September 14, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28934201/forensic-genetics-and-genomics-much-more-than-just-a-human-affair
#7
REVIEW
Miguel Arenas, Filipe Pereira, Manuela Oliveira, Nadia Pinto, Alexandra M Lopes, Veronica Gomes, Angel Carracedo, Antonio Amorim
While traditional forensic genetics has been oriented towards using human DNA in criminal investigation and civil court cases, it currently presents a much wider application range, including not only legal situations sensu stricto but also and, increasingly often, to preemptively avoid judicial processes. Despite some difficulties, current forensic genetics is progressively incorporating the analysis of nonhuman genetic material to a greater extent. The analysis of this material-including other animal species, plants, or microorganisms-is now broadly used, providing ancillary evidence in criminalistics in cases such as animal attacks, trafficking of species, bioterrorism and biocrimes, and identification of fraudulent food composition, among many others...
September 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28934125/optimized-mtdna-control-region-primer-extension-capture-analysis-for-forensically-relevant-samples-and-highly-compromised-mtdna-of-different-age-and-origin
#8
Mayra Eduardoff, Catarina Xavier, Christina Strobl, Andrea Casas-Vargas, Walther Parson
The analysis of mitochondrial DNA (mtDNA) has proven useful in forensic genetics and ancient DNA (aDNA) studies, where specimens are often highly compromised and DNA quality and quantity are low. In forensic genetics, the mtDNA control region (CR) is commonly sequenced using established Sanger-type Sequencing (STS) protocols involving fragment sizes down to approximately 150 base pairs (bp). Recent developments include Massively Parallel Sequencing (MPS) of (multiplex) PCR-generated libraries using the same amplicon sizes...
September 21, 2017: Genes
https://www.readbyqxmd.com/read/28858673/evaluating-the-statistical-power-of-dna-based-identification-exemplified-by-the-missing-grandchildren-of-argentina
#9
Daniel Kling, Thore Egeland, Mariana Herrera Piñero, Magnus Dehli Vigeland
Methods and implementations of DNA-based identification are well established in several forensic contexts. However, assessing the statistical power of these methods has been largely overlooked, except in the simplest cases. In this paper we outline general methods for such power evaluation, and apply them to a large set of family reunification cases, where the objective is to decide whether a person of interest (POI) is identical to the missing person (MP) in a family, based on the DNA profile of the POI and available family members...
August 12, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28837856/secure-and-robust-cloud-computing-for-high-throughput-forensic-microsatellite-sequence-analysis-and-databasing
#10
Sarah F Bailey, Melissa K Scheible, Christopher Williams, Deborah S B S Silva, Marina Hoggan, Christopher Eichman, Seth A Faith
Next-generation Sequencing (NGS) is a rapidly evolving technology with demonstrated benefits for forensic genetic applications, and the strategies to analyze and manage the massive NGS datasets are currently in development. Here, the computing, data storage, connectivity, and security resources of the Cloud were evaluated as a model for forensic laboratory systems that produce NGS data. A complete front-to-end Cloud system was developed to upload, process, and interpret raw NGS data using a web browser dashboard...
August 8, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28834547/high-resolution-melting-hrm-of-hypervariable-mitochondrial-dna-regions-for-forensic-science
#11
Alípio Dos Santos Rocha, Isis Salviano Soares de Amorim, Tatiana de Almeida Simão, Adenilson de Souza da Fonseca, Rodrigo Grazinoli Garrido, Andre Luiz Mencalha
Forensic strategies commonly are proceeding by analysis of short tandem repeats (STRs); however, new additional strategies have been proposed for forensic science. Thus, this article standardized the high-resolution melting (HRM) of DNA for forensic analyzes. For HRM, mitochondrial DNA (mtDNA) from eight individuals were extracted from mucosa swabs by DNAzol reagent, samples were amplified by PCR and submitted to HRM analysis to identify differences in hypervariable (HV) regions I and II. To confirm HRM, all PCR products were DNA sequencing...
August 23, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28766523/-the-morphological-diagnostics-of-the-toxic-effects-of-the-smoking-blends-in-the-cases-of-fatal-intoxication-with-pyrrolidinovalerophenone
#12
P G Dzhuvalyakov, Yu V Zbrueva, S S Kabakova, D V Bogomolov, M R Bekeshov
The objective of the present study was the development of the morphological criteria for the diagnostics of fatal intoxication with the herbal smoking blends (spices) using the samples of the biological materials obtained from the victims of pyrrolidinovalerophenone poisoning. The samples were taken from 13 autopsied cadavers of 11 men and 2 women at the age from 26 to 39 years based at the Astrakhan Regional Bureau of Forensic Medical Expertise during the period from 21011 to 2015. The diagnosis of pyrrolidinvalerpphenon poisoning was verified to the letter...
2017: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/28755626/the-use-of-forensic-dna-analysis-in-humanitarian-forensic-action-the-development-of-a-set-of-international-standards
#13
William H Goodwin
DNA analysis was first applied to the identification of victims of armed conflicts and other situations of violence (ACOSV) in the mid-1990s, starting in South America and the Balkans. Argentina was the first country to establish a genetic database specifically developed to identify disappeared children. Following on from these programs the early 2000s marked major programs, using a largely DNA-led approach, identifying missing persons in the Balkans and following the attack on the World Trade Center in New York...
September 2017: Forensic Science International
https://www.readbyqxmd.com/read/28743032/straf-a-convenient-online-tool-for-str-data-evaluation-in-forensic-genetics
#14
Alexandre Gouy, Martin Zieger
Population data in forensic genetics has to be checked for a variety of statistical parameters before it can be employed for case work. A lot of very powerful statistical tools are available for this task, most of them developed by labs having their research focus on population genetics or evolution. However, most of these programs require a substantial amount of experience. In addition, to our knowledge, none of the freely available programs calculates all the common parameters for a population study in forensic genetics at once, based on a single input file...
September 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28728056/sequence-based-diversity-of-23-autosomal-str-loci-in-koreans-investigated-using-an-in-house-massively-parallel-sequencing-panel
#15
Eun Hye Kim, Hwan Young Lee, So Yeun Kwon, Eun Young Lee, Woo Ick Yang, Kyoung-Jin Shin
As DNA databases continue to grow and international cooperation increases, forensic STR loci have expanded to increase the discriminatory power and inter-database compatibility. Current capillary electrophoresis (CE) and/or massively parallel sequencing (MPS)-based commercial STR analysis systems reflect such changing trends of expanding STR loci. Due to the general gains of larger multiplexing and the detection of sequence variation, the application of MPS technology to STR analysis has further improved discrimination and is expected to aid in mixture interpretation by increasing the effective number of alleles...
September 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28700963/application-of-dip-strs-to-sexual-physical-assault-investigations-eight-case-reports
#16
Fabio Oldoni, Vincent Castella, Diana Hall
DIP-STRs are compound markers formed by a deletion/insertion polymorphism linked to a microsatellite. They enable the deconvolution of unbalanced DNA mixtures from two individuals, up to 1000 fold excess of one contributor. In practice, this novel tool allows to test for the presence of a DNA of interest in traces appearing not useful because of the masking effect of the major DNA contributor. Thus far two sets of DIP-STRs have been published: the first set was described as proof-of-principle, while the second set was specifically developed for forensic applications...
September 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28697681/a-particularly-complex-case-of-matricide-by-means-of-plastic-bag-suffocation-case-report
#17
Arnaldo Stanislao Migliorini, Michele Boracchi, Guendalina Gentile, Francesca Maciocco, Andrea Piccinini, Riccardo Zoja
A rare case of homicide with plastic bag suffocation is presented in which forensic genetic investigations were carried out on the inner surface of a plastic bag placed over the head of an elderly woman, bedridden after a stroke. The results obtained suggested that she had been murdered and hinted at the perpetrator of the crime. In fact, it emerged that biological traces left by the victim matched those of her principal caregiver, her psychotic daughter, who later confessed to the crime. The old woman also had a son affected by a serious illness, whose genetic profile was found on the same bag...
July 2017: Medicine, Science, and the Law
https://www.readbyqxmd.com/read/28691916/social-and-ethical-aspects-of-forensic-genetics-a-critical-review
#18
REVIEW
R Williams, M Wienroth
This review describes the social and ethical responses to the history of innovations in forensic genetics and their application to criminal investigations. Following an outline of the three recurrent social perspectives that have informed these responses (crime management, due process, and genetic surveillance), it goes on to introduce the repertoire of ethical considerations by describing a series of key reports that have shaped subsequent commentaries on forensic DNA profiling and databasing. Four major ethical concerns form the focus of the remainder of the paper (dignity, privacy, justice, and social solidarity), and key features of forensic genetic practice are examined in the light of these concerns...
July 2017: Forensic Science Review
https://www.readbyqxmd.com/read/28631109/increasing-the-reach-of-forensic-genetics-with-massively-parallel-sequencing
#19
REVIEW
Bruce Budowle, Sarah E Schmedes, Frank R Wendt
The field of forensic genetics has made great strides in the analysis of biological evidence related to criminal and civil matters. More so, the discipline has set a standard of performance and quality in the forensic sciences. The advent of massively parallel sequencing will allow the field to expand its capabilities substantially. This review describes the salient features of massively parallel sequencing and how it can impact forensic genetics. The features of this technology offer increased number and types of genetic markers that can be analyzed, higher throughput of samples, and the capability of targeting different organisms, all by one unifying methodology...
June 19, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28589897/phylogenic-analysis-and-forensic-genetic-characterization-of-chinese-uyghur-group-via-autosomal-multi-str-markers
#20
Xiaoye Jin, Yuanyuan Wei, Jiangang Chen, Tingting Kong, Yuling Mu, Yuxin Guo, Qian Dong, Tong Xie, Haotian Meng, Meng Zhang, Jianfei Li, Xiaopeng Li, Bofeng Zhu
We investigated the allelic frequencies and forensic descriptive parameters of 23 autosomal short tandem repeat loci in a randomly selected sample of 1218 unrelated healthy Uyghur individuals residing in the Xinjiang Uyghur Autonomous Region, northwest China. A total of 281 alleles at these loci were identified and their corresponding allelic frequencies ranged from 0.0004 to 0.5390. The combined match probability and combined probability of exclusion of all loci were 5.192 × 10-29 and 0.9999999996594, respectively...
May 18, 2017: Oncotarget
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