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
Biologists unravel another mystery of what makes DNA go 'loopy'
16.03.2018 | Emory Health Sciences
Scientists map the portal to the cell's nucleus
16.03.2018 | Rockefeller University
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
On 15 March, the AWI research aeroplane Polar 5 will depart for Greenland. Concentrating on the furthest northeast region of the island, an international team...
The world’s second-largest ice shelf was the destination for a Polarstern expedition that ended in Punta Arenas, Chile on 14th March 2018. Oceanographers from...
At the 2018 ILA Berlin Air Show from April 25–29, the Fraunhofer Institute for Laser Technology ILT is showcasing extreme high-speed Laser Material Deposition (EHLA): A video documents how for metal components that are highly loaded, EHLA has already proved itself as an alternative to hard chrome plating, which is now allowed only under special conditions.
When the EU restricted the use of hexavalent chromium compounds to special applications requiring authorization, the move prompted a rethink in the surface...
At the ILA Berlin, hall 4, booth 202, Fraunhofer FHR will present two radar sensors for navigation support of drones. The sensors are valuable components in the implementation of autonomous flying drones: they function as obstacle detectors to prevent collisions. Radar sensors also operate reliably in restricted visibility, e.g. in foggy or dusty conditions. Due to their ability to measure distances with high precision, the radar sensors can also be used as altimeters when other sources of information such as barometers or GPS are not available or cannot operate optimally.
Drones play an increasingly important role in the area of logistics and services. Well-known logistic companies place great hope in these compact, aerial...
16.03.2018 | Event News
13.03.2018 | Event News
08.03.2018 | Event News
16.03.2018 | Earth Sciences
16.03.2018 | Physics and Astronomy
16.03.2018 | Life Sciences