|Haplogroup I is found almost exclusively in Europe where it is represented
in about 20% of the population. Its strong geographic concentration
in northwestern Europe has led Hg I to be nicknamed the "Viking" haplogroup
(though some consider R1a to be the only true Viking haplogroup).
I1 is the most common subclade of Hg I. Geographically, it is
highly concentrated in northern Germany, Denmark, and southern Norway and
Sweden. Most individuals who are Haplogroup I1 will be I1*, that
is, root/ancestral I1. Only a few SNPs usefully divide Hg I1, namely
L22 and P109, which appear most freqently in Scandinavia and define I1d
and I1d1, repectively (see SNP table below).
Among European haplotypes, DYS455=8 is virtually exclusive to I1
and YCAIIa,b=19,21 is universal in I1 (table cells highlighted in red).
In lieu of useful SNPs (the search for which is ongoing), varieties of
I1 have been defined by Nordtvedt based on STR haplotypes. Another
useful marker in this subclade is DYS511 (highlighted in royal blue
in the tables), which has a value of 10 in the Norse and ultraNorse
varieties and a value of
9 in the AngloSaxon varieties — 11 is rare.
is similarly useful in separating AngloSaxon and Norse varieties and can
be ordered as an "Advanced" test from FTDNA.
|We have one member of the CARRICO project who is Haplogroup I1, and
deep SNP testing shows him to be L22+, that is, I1d. Cullen's predictor
gives him the highest probability of being I1d-NuN14. The Norse and
ultra-Norse varieties of I1d are most common in Norway.
Some researchers believe Hg I1 took refuge on the Iberian Peninsula
during the LGM (Last Glacial Maximum) ca. 18,000 yrs ago. Others
believe the emergence of I1 came much later. The current distribution
if I1 show it only barely represented in Iberia (see
map for European distribution of Hg I1).