RESUMO
The STRtyper-32G PCR Amplification Kit is a 6-dye multiplex system that combines the 30 autosomal STR loci with an Indel site (YIndel) and the sex-determinant locus Amelogenin. In addition to more loci, Master Mix has been optimized to amplify DNA on different substrates. The autosomal STR loci contained in this novel system meet the compatibility of requirements for databasing. In this study, the developmental validation study of the STRtyper-32G Kit followed the guidelines of SWGDAM (Scientific Working Group on DNA Analysis Methods), including PCR-based studies, species specificity, inhibitors, sensitivity, precision, repeatability, stutter, DNA mixtures, concordance studies, and population genetics studies. The validation results indicate that the new multiplex system is a robust tool for forensic database applications.
Assuntos
Reação em Cadeia da Polimerase Multiplex/instrumentação , Técnicas de Amplificação de Ácido Nucleico/métodos , Amelogenina/genética , Povo Asiático/etnologia , Povo Asiático/genética , Bases de Dados de Ácidos Nucleicos , Humanos , Mutação INDEL/genética , Repetições de Microssatélites/genética , Sensibilidade e Especificidade , Especificidade da EspécieRESUMO
Y- Changchun is the capital and largest city of Jilin Province in the northeast China. In this study, we genotyped and investigated haplotypes of 27 Y-STR loci in 1037 Changchun Han male individuals using commercially available AmpFlSTR Yfiler® Plus kit. We calculated the Gene diversity (GD) values and haplotype diversity (HD) as important forensic parameters. Furthermore, we observed genetic affinities between Changchun Han with other Northern Han Chinese populations and also Korans in Yanbian in the Multidimensional scaling and phylogenetic tree analysis.
Assuntos
Cromossomos Humanos Y/genética , Genética Forense , Genética Populacional , Haplótipos/genética , Repetições de Microssatélites/genética , Povo Asiático/genética , China , Loci Gênicos/genética , Variação Genética/genética , Técnicas de Genotipagem , Humanos , Masculino , FilogeniaRESUMO
BACKGROUND: The Yi-Luo valley witnessed the most significant socio-political transformation of China and was deeply implicated in several enormous migrations of the Han population. However, little has been done to clarify its paternal genetic variation or phylogenetic relationship, particularly concerning the genetic evidence of their migrations. AIM: This study aims to uncover the population genetic characteristics in the Yi-Luo valley and provide genetic evidence for its people's migrations. SUBJECTS AND METHODS: Seventeen Y-STR loci included in the AmpFlSTR®Yfiler™ were typed in 2,314 individuals from seven different regions along the Yi-Luo valley. A multidimensional scaling plot and neighbor-joining tree were constructed for nationwide genetic comparisons. Y-haplogroup frequencies and migration rates were estimated among the studied populations. Gene flows were detected by different migration models and directions. RESULTS: The predicted Y-haplogroups demonstrated the predominance of O2a2. Genetic affinities were observed among Han, Hakka, Danmin, and Bai. Anhui was shown to be the most crucial transfer spot for the Hakkas when they moved out of the Central Plains to South China. CONCLUSIONS: This study reveals the genetic landscape of paternal lineages living in the Yi-Luo valley and enriches our understanding of the great migration in Chinese history.
Assuntos
Cromossomos Humanos Y , Fluxo Gênico , China , Cromossomos Humanos Y/genética , Etnicidade , Frequência do Gene , Marcadores Genéticos , Genética Populacional , Haplótipos , Humanos , Repetições de Microssatélites/genética , FilogeniaRESUMO
Y-chromosome haplotypes of 527 non-related males (176 Han, 186 Tibetan, and 165 Yi) in the Tibetan-Yi corridor were analyzed using SureID® PathFinder Plus. In the populations of Han, Tibetans, and Yi, the haplotype diversity was 0.9989, 0.9981, and 0.9993, respectively, and the discrimination capacity was 0.9148, 0.8925, and 0.9576, respectively. Phylogenetic relationships among 12 studied ethnic groups and 7 other ethnic groups in the Tibetan-Yi corridor were investigated. Both multi-dimensional scaling analysis and phylogenetic reconstructions indicated that Tibetans appeared separated from the Han and Yi ethnic groups in the Tibetan-Yi corridor. Their genetic homogeneity or heterogeneity has not entirely been affected by their geographical distance and linguistic origin.
Assuntos
Povo Asiático/etnologia , Povo Asiático/genética , Cromossomos Humanos Y , Etnicidade/genética , Haplótipos , Repetições de Microssatélites , Alelos , Variação Genética , Genética Populacional , Humanos , Masculino , Filogenia , Tibet/etnologiaRESUMO
Aksay Kazakhs are the easternmost branch of Kazakhs, residing in Jiuquan city, the forefront of the ancient Silk Road. However, the genetic diversity of Aksay Kazakhs and its relationships with other Kazakhs still lack attention. To clarify this issue, we analyzed the non-recombining portion of the Y-chromosome from 93 Aksay Kazakhs samples, using a high-resolution analysis of 106 biallelic markers and 17 STRs. The lowest haplogroup diversity (0.38) was observed in Aksay Kazakhs among all studied Kazakh populations. The social and cultural traditions of the Kazakhs shaped their current pattern of genetic variation. Aksay Kazakhs tended to migrate with clans and had limited paternal admixture with neighboring populations. Aksay Kazakhs had the highest frequency (80%) of haplogroup C2b1a3a1-F3796 (previous C3*-Star Cluster) among the investigated Eurasian steppe populations, which was now seen as the genetic marker of Kerei clan. Furthermore, NETWORK analysis indicated that Aksay Kazakhs originated from sub-clan Kerei-Abakh in Kazakhstan with DYS448 = 23. TMRCA estimates of three recent descent clusters detected in C2*-M217 (xM48) network, one of which incorporate nearly all of the C2b1a3a1-F3796 Aksay Kazakhs samples, gave the age range of 976-1405 YA for DC1, 1059-1314 YA for DC2, and 1139-1317 YA for DC3, respectively; this is coherent with the 7th to the 11th centuries Altaic-speaking pastoral nomadic population expansion.
