Abstract:
:It is often assumed that Afrikaners stem from a small number of Dutch immigrants. As a result they should be genetically homogeneous, show founder effects and be rather inbred. By disentangling my own South African pedigree, that is on average 12 generations deep, I try to quantify the genetic heritage of an Afrikaner. As much as 6% of my genes have been contributed by slaves from Africa, Madagascar and India, and a woman from China. This figure compares well to other genetic and genealogical estimates. Seventy three percent of my lineages coalesce into common founders, and I am related in excess of 10 times to 20 founder ancestors (30 times to Willem Schalk van der Merwe). Significant founder effects are thus possible. The overrepresentation of certain founder ancestors is in part explained by the fact that they had more children. This is remarkable given that they lived more than 300 years (or 12 generations) ago. DECONSTRUCT, a new program for pedigree analysis, identified 125 common ancestors in my pedigree. However, these common ancestors are so distant from myself, paths of between 16 and 25 steps in length, that my inbreeding coefficient is not unusually high (f approximately 0.0019).
journal_name
Ann Hum Genetjournal_title
Annals of human geneticsauthors
Greeff JMdoi
10.1111/j.1469-1809.2007.00363.xsubject
Has Abstractpub_date
2007-09-01 00:00:00pages
674-88issue
Pt 5eissn
0003-4800issn
1469-1809pii
AHG363journal_volume
71pub_type
杂志文章abstract::Haplotype analysis is important for mapping traits. Recently, methods for estimating haplotype frequencies from genotypes of unrelated individuals based on the expectation-maximization (EM) algorithm have been developed. Our program estimates haplotype frequencies in the population and determines the posterior probabi...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1017/S0003480002001124
更新日期:2002-05-01 00:00:00
abstract::Statistical methods are developed for tracing quantitative measurements on human chromosomes from parents to offspring. Tests for transmission are briefly considered. ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1977.tb01963.x
更新日期:1977-07-01 00:00:00
abstract::Population samples from Liguria, Piacenza and Pavia provinces, and North Lombardy are compared for surnames and HLA gene frequencies. The genetic structure inferred from the principal coordinate analysis of surname frequencies is different from that inferred from HLA gene frequencies. The latter may represent ancient ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1046/j.1469-1809.1998.6230261.x
更新日期:1998-05-01 00:00:00
abstract::Klippel-Trenaunay syndrome (KTS) is a congenital vascular disorder comprised of capillary, venous and lymphatic malformations associated with overgrowth of the affected tissues. In this study, we report the identification of a de novo supernumerary ring chromosome in a patient with mild mental retardation, long taperi...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2004.00095.x
更新日期:2004-07-01 00:00:00
abstract::Uterine fibroids (UFs) are the most common benign neoplasms, but their pathogenesis is not completely understood. Thus far, alterations in the mitochondrial DNA (mtDNA) content and the mtDNA 4977-bp deletion level in UFs, as well as the corresponding nontumorous tissue, have remained elusive. To test whether large mtD...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/ahg.12303
更新日期:2019-07-01 00:00:00
abstract::Atypical hemolytic uremic syndrome (aHUS) is caused by several susceptibility genes. A registry including analyses of susceptibility genes, familial occurrence and genotype-phenotype correlation should provide classification insights. Registry data of 187 unrelated index patients included age at onset, gender, family ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.2009.00554.x
更新日期:2010-01-01 00:00:00
abstract::We analyzed commonly reported European and Asian obesity-related gene variants in a Mexican-Mestizo population through each single nucleotide polymorphism (SNP) and a genetic risk score (GRS) based on 23 selected SNPs. Study subjects were physically active Mexican-Mestizo adults (n = 608) with body mass index (BMI) ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/ahg.12190
更新日期:2017-05-01 00:00:00
abstract::Allelic transmission rates from parents to cases are frequently stratified by an environmental risk factor E and compared, with heterogeneity interpreted as gene-environment interaction or GxE. Though generally invalid, such analyses continue to appear. We revisit why heterogeneity is not equivalent to GxE in a range ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.2010.00599.x
更新日期:2010-09-01 00:00:00
abstract::A simple selection model (fitness 1, w, w2 for AA, Aa, aa) is employed to change the gene frequency of one population to another. The genetic distance is then defined as d = -log w between the two populations. The distance is symmetrical with respect to the two populations. It is additive: d13 = d12 + d23. The samplin...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1978.tb00922.x
更新日期:1978-05-01 00:00:00
abstract::This paper proposes family based Hotelling's T(2) tests for high resolution linkage disequilibrium (LD) mapping or association studies of complex diseases. Assume that genotype data of multiple markers or haplotype blocks are available for a sample of nuclear families, in which some offspring are affected. Paired Hote...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2004.00151.x
更新日期:2005-03-01 00:00:00
abstract::It has been suggested that an X-linked dominant allele operates in the genetic transmission of bipolar (manic-depressive) illness. Linkage studies with X-chromosome markers have remained inconclusive, showing both positive and negative results. Some of the ambiguity may be attributed to imprecise analytic methods and ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1982.tb00706.x
更新日期:1982-05-01 00:00:00
abstract::A crucial step beyond the identification of genetic linkage of a disease to a chromosomal region is the production of a physical map that will allow the identification of candidate genes. Although the process of physical map building has been facilitated by the flow of data released by the Human Genome Project, gather...
journal_title:Annals of human genetics
pub_type: 杂志文章,评审
doi:10.1017/S0003480001008594
更新日期:2001-05-01 00:00:00
abstract::Genome-wide association (GWA) studies have identified around 20 common genetic variants influencing the risk of type 2 diabetes (T2D). Likewise, a number of variants have been associated with diabetes-related quantitative glycaemic traits, but to date the overlap between these genes and variants has been low. The majo...
journal_title:Annals of human genetics
pub_type: 杂志文章,meta分析
doi:10.1111/j.1469-1809.2010.00607.x
更新日期:2010-11-01 00:00:00
abstract::Hereditary hearing impairment is the most genetically heterogeneous trait known in humans. So far, 50 published autosomal recessive non-syndromic hearing impairment (ARNSHI) loci have been mapped, and 23 ARNSHI genes have been identified. Here, we report the mapping of a novel ARNSHI locus, DFNB63, to chromosome 11q13...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.2006.00337.x
更新日期:2007-03-01 00:00:00
abstract::Determination of activity and electrophoretic mobility of GALT in patients with various chromosome 9 deletions and duplications confirms the assignment of its locus to 9p and suggests its locus is in the segment 9cen leads to p22. Two inversions of 9qh (inv(9)(p11q12)) did not alter GALT expression. ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1980.tb01568.x
更新日期:1980-05-01 00:00:00
abstract::Two closely linked structural loci, D and 'CcEe', are proposed as the basis of the Rh blood groups. Mutation and unequal crossing-over between the two loci at meiosis are considered as possible explanations for some rare Rh complexes. The theory predicts that complexes arising from unequal crossing-over would be expec...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1986.tb01045.x
更新日期:1986-07-01 00:00:00
abstract::Published data on the association between the methylenetetrahydrofolate reductase (MTHFR) gene A1298C (rs1801131) polymorphism and male infertility risk are inconclusive. To derive a more precise estimation of the relationship, a meta-analysis was performed. In this meta-analysis, a total of seven case-control studies...
journal_title:Annals of human genetics
pub_type: 杂志文章,meta分析
doi:10.1111/j.1469-1809.2011.00691.x
更新日期:2012-01-01 00:00:00
abstract::Except for subgroup A2 and minor A, O and B alleles (Ax, O2 and B(A)), which occur at low frequencies in the population, the major ABO alleles are considered to be homogeneous entities. The present study is the first demonstration of an extensive variability linked to the more common alleles of the blood A and O genes...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1996.tb01173.x
更新日期:1996-01-01 00:00:00
abstract::The robust sib-pair method introduced by Haseman & Elston (1972) is one of the most widely circulated allele-sharing methods for linkage analysis. The procedure evaluates linkage by significance testing of a regression coefficient and, hence, a standard t-test has traditionally been applied despite known violations of...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1046/j.1469-1809.1997.6110077.x
更新日期:1997-01-01 00:00:00
abstract::Specific language impairment (SLI) is defined as an inability to develop appropriate language skills without explanatory medical conditions, low intelligence or lack of opportunity. Previously, a genome scan of 98 families affected by SLI was completed by the SLI Consortium, resulting in the identification of two quan...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.2007.00361.x
更新日期:2007-09-01 00:00:00
abstract::In case-control association studies unobserved population stratification may act as a confounder, leading to an increased number of false positive results. Methods accounting for population structure by using additional genetic markers broadly follow one of two concepts: Genomic Control (GC) and Structured Association...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2005.00214.x
更新日期:2006-01-01 00:00:00
abstract::We analysed microsatellite genotypes sampled from the Pakistani and Indian communities in Nottingham, UK, to investigate the genetic consequences of substructuring mediated by traditional marriage customs. The application of a recently developed likelihood approach identified significant levels of population substruct...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2003.00062.x
更新日期:2003-11-01 00:00:00
abstract::The marriages contracted between 1600 and 1850 in the parishes Vang and Slidre in the mountain valley of Valdres in Norway were investigated, using the information in the genealogical and local history of the parishes and in various public archives. The parishes functioned as a marriage isolate, in spite of regular co...
journal_title:Annals of human genetics
pub_type: 历史文章,杂志文章
doi:
更新日期:1977-05-01 00:00:00
abstract::By biochemical characterization of glucose-6-phosphate dehydrogenase (G6PD) from the red cells of seventeen subjects of the population of Matera (Southern Italy) we have identified six genetically determined common variants. Among these, G6PD Metaponto and G6PD A(-) Matera had been already fully characterized. We have...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1990.tb00355.x
更新日期:1990-01-01 00:00:00
abstract::In the process of genetically mapping a complex disease, the question may arise whether a certain polymorphism is the only causal variant in a region. A number of methods can answer this question, but unfortunately these methods are optimal for bi-allelic loci only. We wanted to develop a method that is more suited fo...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2004.00129.x
更新日期:2005-01-01 00:00:00
abstract::The available simple mapping functions are surveyed, and a new mapping function that provides for positive interference within chromosome arms and no interference across the centromere is proposed, together with the corresponding formula for centromeric linkage. This new function is derived by assuming that all chromo...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1976.tb00175.x
更新日期:1976-11-01 00:00:00
abstract::Estimating haplotype relative risks in a family-based study is complicated by phase ambiguity and the many parameters needed to quantify relative risks for all possible diplotypes. This problem becomes manageable if a particular haplotype has been implicated previously as relevant to risk. We fit log-linear models to ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.2009.00515.x
更新日期:2009-05-01 00:00:00
abstract::Genetic variations in cardiac ion channels have been implicated not only as the causes of inherited arrhythmic syndromes, but also as genetic risk factors for some acquired arrhythmias. To elucidate the potential roles of genetic polymorphisms of the alpha subunit of the voltage-gated sodium channel type V (SCN5A) in ...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2005.00167.x
更新日期:2005-07-01 00:00:00
abstract::The aims of this study were to investigate the contributions of the mitochondrial DNA m.4216T > C and m.4917A > G variants, and also of the European-specific mitochondrial cluster J/T, to the development of type 2 diabetes mellitus in Caucasian-Brazilian patients from Southern Brazil. We analyzed 347 type 2 diabetes p...
journal_title:Annals of human genetics
pub_type: 杂志文章,多中心研究
doi:10.1111/j.1469-1809.2005.00249.x
更新日期:2006-07-01 00:00:00
abstract::The objectives of this study were to elucidate the genetic basis of human deoxyribonuclease II (DNase II) and to evaluate its usefulness as a genetic and/or diagnostic marker. We have devised a novel, specific and highly sensitive assay method for the urinary and leukocytic enzymes (Yasuda et al. 1991). The distributi...
journal_title:Annals of human genetics
pub_type: 杂志文章
doi:10.1111/j.1469-1809.1992.tb01125.x
更新日期:1992-01-01 00:00:00