Vikings played a prominent role among the peoples of the North Atlantic, and the populations founded by them might be expected to be genetically similar and homogeneous. New research suggests that the Icelandic and Faroese people had distinctly different founding fathers. This result is consistent with a scenario in which the male population of the Faroe Islands was formed by a more diverse population from the more diverse Scandinavian population than from neighboring Icelanders. Furthermore, this study conclusively shows that there is no evidence of post-founder admixture between the Faroese and Icelandic gene pools.
The Faroe Islands consist of an archipelago of 18 small islands located in the North Atlantic Ocean between southern Norway, Iceland, and Scotland. As a result of their demographic history and relative geographical isolation, the Faroe Islands, like other North Atlantic island populations, are genetically homogeneous compared to mainland populations. Historical and archaeological sources report that the Faroe Islands were settled around 800 AD by Vikings, primarily from western Norway. However, increasing evidence suggests that these islands were settled earlier, perhaps by Celtic monks or other people from the British Isles. Carbon dating of peat moss and barley grain supports two pre-Viking periods of settlement, approximately 300-500 AD and 500-700 AD. More recently, scientists detected sheep DNA in archaeological deposits from 500 AD, and based on modern whole-genome data, the original founding of the Faroe Islands occurred between 50 and 300 AD. estimated that it may have been two to three centuries earlier than previously thought. Based solely on archaeological findings. Image credit: Oscar CR
From the 8th century to about 1050 AD, Vikings roamed the Atlantic in longships all the way to Newfoundland, Labrador, and Greenland, as well as exploring the Mediterranean and Eurasia.
Among the places they are known to have settled are the Faroe Islands, an archipelago of 18 islands in the North Atlantic Ocean.
They probably weren’t the first. Archaeologists have found evidence that these islands have been inhabited since about 300 AD, perhaps by Celtic monks or other people from the British Isles.
However, according to Fairinga Sagawritten around 1200, a Viking chieftain called Grimur Kamban settled in the Faroe Islands between about 872 and 930 AD. But where in Scandinavia did Grimur and his followers come from?
“We have strong evidence here that the Faroe Islands were colonized by a diverse group of male settlers from multiple Scandinavian populations,” said University of Louisville researcher Dr. Christopher Tillquist. .
In this study, Dr. Tillquist and his colleagues genotyped 12 “short tandem repeat” (STR) loci on the Y chromosome of 139 men from the Faroese islands of Bordoloi, Streymoy, and Suzloj.
They assigned each man to the most likely haplogroup. Each haplogroup has a different known distribution across Europe today.
They compared the genotype distribution to that found in 412 men from Norway, Sweden, Denmark, Iceland, and Ireland.
This allowed the team to reconstruct the source population of the founders of the Viking population.
Advanced analysis showed that the Faroe Islands sample range was similar to the broader Scandinavian genotype range, whereas the Icelandic genotypes were different.
The authors also developed a powerful and innovative genetic method called “variational distance from modal haplotype” to analyze SNP (single nucleotide polymorphism) variation within STRs.
This has led to the “founder effect” (vestiges of random loss of diversity during historical colonization by a small number of people) that remains in the genetic composition of male populations in the Faroe Islands and Iceland today. was able to clarify.
“Scientists have long thought that the Faroe Islands and Iceland were settled by similar Nordic peoples,” Dr Tillquist says.
“However, our new analysis showed that these islands were founded by people belonging to different gene pools within Scandinavia.”
“One group of diverse Scandinavian origins settled in the Faroe Islands, while a more genetically distinct group of Vikings colonized Iceland. They had separate genetic characteristics that continue to this day. Masu.”
“Despite their geographic proximity, there appears to have been no subsequent interbreeding between these two populations.”
“Our findings show that Viking expansion into the North Atlantic was more complex than previously thought.”
“Each longship that sailed to these distant islands carried a different genetic heritage, and not just Vikings.”
“We can now trace the separate journeys of conquest and settlement, revealing a more nuanced story of Viking exploration than is told in history books.”
of findings appear in the diary frontiers of genetics.
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Alison E. Mann others. 2024. Genetic evidence points to distinct patrilineal colonization of the Faroe Islands and Iceland. front. Genet 15;doi: 10.3389/fgene.2024.1462736
Source: www.sci.news
