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Journal Article Archive 2016-10-14T01:03:42+00:00

Journal Article Archive

Y chromosome markers and Trans-Bering Strait dispersals

Journal: American Journal of Physical Anthropology | Year: 1997

Abstract:

Five polymorphisms involving two paternally inherited loci were surveyed in 38 world populations (n = 1,631) to investigate the origins of Native Americans. One of the six Y chromosome combination haplotypes (1T) was found at relatively high frequencies (17.8–75.0%) in nine Native American populations (n = 206) representing the three major linguistic divisions in the New World. Overall, these data do not support the Greenberg et al., (1986) tripartite model for the early peopling of the Americas. The 1T haplotype was also discovered at a low frequency in Siberian Eskimos (3/22), Chukchi (1/6), and Evens (1/65) but was absent from 17 other Asian populations (n = 987). The perplexing presence of the 1T haplotype in northeastern Siberia may be due to back-migration from the New World to Asia.

Peoples: - | Places: - | Topics: - | DNA Type: Y-DNA

Y chromosome microdeletions are not associated with spontaneous recurrent pregnancy loss in a Sinhalese population in Sri Lanka

Journal: Human Reproduction | Year: 2010

Abstract:

Many advances have been made in reproductive medicine, yet the spontaneous loss of a pregnancy remains the most common complication of pregnancy. The aetiology of spontaneous recurrent pregnancy loss (RPL) is multifactorial. Y chromosome microdeletions are found in ?7% of men with low sperm counts and, compared with the general population, a higher frequency of spontaneous pregnancy loss occurs in infertile couples. The current study was designed to examine whether Y chromosome microdeletions were associated with RPL in a Sinhalese population in Sri Lanka.METHODS The subjects were 76 male partners of couples where the female partner had experienced three or more RPLs. One hundred and twenty random males from the general population were also analysed as a control group. DNA extracted from peripheral blood was tested for Y chromosome microdeletions in the azoospermic factor (AZF), AZFa, AZFb, AZFc regions using a multiplex PCR amplification system. Partial deletions within the AZFc region were also tested.RESULTS None of the men (76 with RPL, and the 120 controls) had any microdeletions in the AZFa, AZFb, AZFc regions or partial deletions in the AZFc region.CONCLUSIONS Y chromosome microdeletions do not appear to be important in the aetiology of RPL in this population in Sri Lanka.

Peoples: - | Places: - | Topics: - | DNA Type: Y-DNA

Y chromosome microsatellite genetic variation in two Native American populations from Argentina: Population stratification and mutation data

Journal: Forensic Science International: Genetics | Year: 2008

Abstract:

Two Native American populations from North and northwest regions of Argentina (Toba and Colla) were analyzed for 17 Y chromosome short tandem repeat loci (Y-STRs), namely, DYS19, DYS389I, DYS389II, DYS390, DYS391, DYS392, DYS393, DYS385, DYS437, DYS438, DYS439, DYS448, DYS456, DYS458, DYS635 and GATA H4.1. Over 357 allele transfers, two one-step mutations could be detected at DYS456 and GATA H4.1 loci. A new 16.1 ‘micro-variant' allele was observed for DYS385, characterized by an insertion at the fifth GAAA repeat. We also observed two alleles at the DYS448 locus in three samples (two from Toba and one from Colla). A total of 34 and 16 different haplotypes were detected for Toba and Colla, respectively, the former with a haplotype diversity value of 0.9769+/-0.01, whereas 0.9497+/-0.02 for the latter. Significant population differences were observed between Colla and Toba, at least in part, due to a more prevalent European input in the Colla. In agreement with this observation is the fact that the genetic distances between Colla and Iberian populations are lower than those observed between Iberian and any other Native American population. The results of multiscaling dimensional analysis and genetic distances (Rst) among Native American population samples also reflect this fact. The data show the existence of clear population stratification in the Argentina, a fact that should be taken into account in forensic casework.

Peoples: - | Places: - | Topics: - | DNA Type: Y-DNA

Y chromosome sequence variation and the history of human populations

Journal: Nature Genetics | Year: 2000

Abstract:

Binary polymorphisms associated with the non-recombining region of the human Y chromosome (NRY) preserve the paternal genetic legacy of our species that has persisted to the present, permitting inference of human evolution, population affinity and demographic history1. We used denaturing high-performance liquid chromatography (DHPLC; ref. 2) to identify 160 of the 166 bi-allelic and 1 tri-allelic site that formed a parsimonious genealogy of 116 haplotypes, several of which display distinct population affinities based on the analysis of 1062 globally representative individuals. A minority of contemporary East Africans and Khoisan represent the descendants of the most ancestral patrilineages of anatomically modern humans that left Africa between 35,000 and 89,000 years ago.

Peoples: - | Places: - | Topics: - | DNA Type: Y-DNA

Y chromosome STR allelic and haplotype diversity in a Rwanda population from East Central Africa

Journal: Legal Medicine | Year: 2012

Abstract:

We have analyzed 17 Y-chromosomal STR loci in a population sample of 69 unrelated male individuals of the Rwanda-Hutu population from East Central Africa using an AmpFlSTR® Yfiler™ PCR amplification kit. A total of 62 unique haplotypes were identified among the 69 individuals studied. The haplotype diversity was found to be 0.9970 for this population. The gene diversity ranged from 0.1130 (DYS392) to 0.7722 (DYS385). Comparison of populations in this study with twenty-five other national and global populations using Principal Co-ordinate Analysis (PCA) and phylogenetic molecular analysis using a genetic distance matrix indicates a delineation of all the African populations from other unrelated populations. The results of population pair-wise Fst p values indicate statistically significant differentiation of the Rwandan population when compared with 25 other global populations including four African populations (p = 0.0000). Analysis of Molecular Variance (AMOVA) of the Rwanda population with four other African populations indicated a 93% variance within populations and 7% variance among the five populations. A data base search of the 62 haplotypes yielded only one non-African haplotype match, suggesting these haplotypes are unique to the African continent.

Peoples: - | Places: East Central Africa and Rwanda | Topics: - | DNA Type: Y-DNA

Y chromosome STR allelic and haplotype diversity in five ethnic Tamil populations from Tamil Nadu, India

Journal: Legal Medicine | Year: 2010

Abstract:

We have analyzed 17 Y chromosomal STR loci in a population sample of 154 unrelated male individuals of the Tamil ethnic group residing in the state of Tamil Nadu, Southern India using AmpFlSTR® Yfiler™ PCR amplification kit. The population samples consist of the following castes: Kongu Gounder (KOG), Nadar Hindu (NAH), Agamudayar (AGA), Parayar (PAR) and other Tamil individuals (MCT) of mixed castes. A total of 152 unique haplotypes were identified among the 154 individuals studied. The haplotype diversity was found to be 0.9935 or higher for all the five groups. The results of population pairwise Fst p values indicate no statistically significant differentiation between the five populations in this study, but the results were highly significant when compared with 12 other global populations (p?

Peoples: Agamudayar, Kongu Gounder, Nadar Hindu, Parayar, and Tamil | Places: India and Tamil Nadu | Topics: - | DNA Type: Y-STR

Y chromosome STR haplotypes and allele frequencies in a southern Indian male population

Journal: Journal of Forensic Sciences | Year: 2008

Abstract:

None

Peoples: - | Places: - | Topics: - | DNA Type: Y-DNA

Y chromosome STR haplotypes in the Caribbean city of Cartagena (Colombia)

Journal: Forensic Science International | Year: 2007

Abstract:

Haplotype data were obtained from a sample of 173 unrelated male individuals from Cartagena (Colombia), for 16 Y-chromosome STRs (DYS19, DYS385, DYS389 I, DYS389 II, DYS390, DYS391, DYS392, DYS393, DYS437, DYS438, DYS439, DYS460, DYS461, DYS635, GATA H4 and GATA A10). No shared haplotypes were observed, demonstrating the usefulness and informative power of these Y-STRs in male lineage identification in Cartagena. Genetic distances were calculated using previously published haplotype data and the lowest values were found for the comparisons with samples of Iberian origin.

Peoples: - | Places: Caribbean, Cartagena, and Colombia | Topics: - | DNA Type: Y-STR

Y chromosome STR haplotypes of Tibetan Living Tibet Lassa

Journal: Forensic Science International | Year: 2007

Abstract:

Allele frequencies and haplotypes of the 17 Y-chromosome STRs loci, namely DYS19, DYS385a/b, DYS389I, DYS389II, DYS390, DYS391, DYS392, DYS393, DYS437, DYS438, DYS439, DYS448, DYS456, DYS458, DYS635 (YGATA C4), and YGATA H4 were determined in a sample of 131 healthy unrelated males from the Lassa area of Tibet Autonomy Region of China (SW China). In 131 samples 106 different haplotypes were encountered, of which 105 were observed only once. The overall haplotype diversity was 0.9998. The results demonstrate that these loci will be very useful for human identification in forensic cases and paternity tests in the Lassa region.

Peoples: - | Places: - | Topics: - | DNA Type: Y-DNA

Y chromosome variation in Europe: Continental and local processes in the formation of the extant gene pool

Journal: Annals of Human Biology | Year: 2007

Abstract:

The polymorphism of the male-specific portion of the Y chromosome has been increasingly used to describe the composition of the European gene pool and to reconstruct its formation. Here the theoretical grounds and the limitations of this approach are presented, together with the different views on debated issues. The emerging picture for the composition of the male gene pool of the continent is illustrated, but local peculiarities that represent departures from the main trends are also highlighted, in order to illustrate the main unifying feature, i.e. the overlay of recent patterns onto more ancient ones. A synopsis of the main findings and conclusions obtained in regional studies has also been compiled.

Peoples: - | Places: Europe | Topics: - | DNA Type: Y-DNA

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