There has been some controversy in the media and within the scientific research community concerning whether Icelanders are genetically homogenous or heterogeneous relative to other European populations.
Following an article published in Annals of Human Genetics in January 2003 by E. Árnason, who concluded that Icelanders were one of the most heterogeneous populations in Europe, researchers from deCODE Genetics and the University of Oxford, have published an article in Annals of Human Genetics (issue 67:4, July 2003) corroborating findings from earlier studies that Iceland is indeed home to one of the most homogenous gene pools in Europe.
This latest research article, ‘A Reassessment of Genetic Diversity in Icelanders: Strong Evidence from Multiple Loci for Relative Homogeneity Caused by Genetic Drift’ by A. Helgason, G. Nicholson, K. Stefánsson and P. Donnelly, both greatly expands sample sizes from individual populations and the number of genetic loci analysed, and uses population genetics simulations to demonstrate that genetic drift, not admixture (as claimed by E. Árnason), has been the overriding factor influencing patterns of genetic variation in Iceland. Moreover, these simulations also reveal that the summary statistics (gene diversity and mean pairwise mutational differences) used by E. Árnason, to argue for the relative genetic heterogeneity of Icelanders in his analysis of mitochondrial DNA (mtDNA) sequences, are poor comparative measures of genetic diversity in closely related populations such as those of Iceland and other European countries.
Melanie Johnstone | alfa
Gene therapy shows promise for treating Niemann-Pick disease type C1
27.10.2016 | NIH/National Human Genome Research Institute
'Neighbor maps' reveal the genome's 3-D shape
27.10.2016 | International School of Advanced Studies (SISSA)
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences