Haplogroup Q-L804 is a Y-chromosome DNA haplogroup. Haplogroup Q-L804 is a subclade of Haplogroup Q-L54. Currently Q-L804 is Q1b1a1b below Q1b-M346. In 2000 the research group at Oxford University headed by Dr. Agnar Helgason first discovered the haplotype that was much later to become known as Q-L804. In 2000 the strange haplotype was called “branch-A” and it was found uniquely on Iceland and Scandinavia. Later studies completed the genetic bridge by determining that Q-L804 is related to Q-M242 populations of Native Americans, Turkmen and Siberian populations of the Selkup and Ket people.
Origin and distribution
The origin of Haplogroup Q-L804 is uncertain. However it is likely to have originated in Beringia c. 15000 to 17000 yBP since it is closely linked to Q-M3 and to other haplogroups linked to the indigenous peoples of the Americas. Today, Q-L804 is found mainly in Norway and Sweden and in regions of North West Europe of Viking Age Expansion. The Q-L804 is also found among descendants of Scandinavian immigrants to North America. Haplogroup Q-L804 is defined by the presence of the single-nucleotide polymorphism. Q-L804 occurred on the Q-L54 lineage roughly 10-15 thousand years ago as the migration into the Americas was underway. It is likely that the split between Q-M3 and Q-L804 happened in the ancestors of the indigenous peoples of the Americas.
Populations carrying Q-L804 are extremely thinly distributed throughout Northern Europe and among recent North European immigrants to North America. Since the discovery and definition of Q-L804 in 2014, three main subclades of Q-L804 bearing populations have been discovered in North Europe. The Q-Y9052 , the Q-JN14 and Q-Y7582. Of these three branches Q-JN14 has the widest distribution, ranging from Poland to Iceland, British Isles and France. Q-L804 is one of two subclades known as Q Nordic among genealogical communities. The Q-L527 is the other subclad of the Q Nordic.
Subclade distribution
Q-Y9052. This lineage is found in Sweden, Norway and Germany. Q-JN14 It has been found in Norway, Iceland, British Isles, Germany, France and Poland. Q-Y7582. This lineage has been found in Scotland, Iceland and England.
Q-L804 is defined by the SNPs L804 and L805 and E324.
Phylogentic tree and Subgroups
Current status of the polygentic tree for Q-L804 is published by pinotti et. al in the article Y Chromosome Sequences Reveal a Short Beringian Standstill, Rapid Expansion, and early Population structure of Native American Founders. Calibrated phylogeny of Y haplogroup Q-L804 and its relation to the other branches of Q-L54.
Q-L54
* Q-L330
* Q-MPB001
** Q-CTS1780
** Q-M930
*** Q-L804
*** Q-M3
**** Q-Y4308
**** Q-M848
Yfull.com's phylogenetic tree ver. 6.08.01 for for haplogroup Q-L804. Yfull's tree also include estimation of the age of the branches, and TMRCA
The subtree Q-BY387 is found on Iceland, Scotland and England. The Q-JN14 is widely distributed in North-west Europe, but most kits are from Norway. The subtree Q-BY459 is by FT DNA mainly found in Sweden and Norway.
