| Haplogroup I is found almost exclusively in Europe where it is represented
in about 20% of the population, though subclade I2 is decidedly less common
than its sister clade, I1. It's difficult to generalize about I2
because it contains a number of geographically limited subgroups.
One group of I2a is concentrated in the Balkans and is called "Dinaric"
(for a mountain range there, the Dinaric Alps), while another group is
found around the Baltic and North Sea coastal areas, another in the British
Isles, and another in Sardinia and Iberia. The root clade of I2b
is uncommon, with a probable origin from an Iberian glacial refugium from
which it spread widely in western Europe. The main variety of I2b,
dubbed "Continental," is most common in northwestern Europe, southern Scandinavia,
and Britain. Another group is almost exclusive to the British Isles
with a concentration in Scotland.
So far, five members of Danish Demes are Haplogroup I2:
Unlike Haplogroup I1, which is universally 8 at marker DYS455, Haplogroup
I2 is usually 11 at this marker (sometimes 10 and very rarely 9). |
| Ken Nordtvedt is the guru researching Hg I subclades (see his Excel
spreadsheet; modals below are his). For a table showing modal
haplotypes for Hg I varieties
in FamilyTreeDNA marker order, please
also see my HTML
transcription of Nordtvedt's spreadsheet. |
The Y-DNA haplotree has undergone a major revision in 2008. For
Haplogroup I, the major change is the removal of old I1 based on the P38
SNP, which means all downstream clades have been "bumped up" a notch.
What that means for us is that everyone who was formerly I1b is now I2.
This change has been adopted by FTDNA,
ISOGG,
Nordvedt,
and by me here on these web pages (as of Aug 2008). FTNDA is not
recognizing the subclade defined by M223, so those who are I21b under the
ISOGG system will be I2b on their FTDNA member page.
| Nordtvedt's
Chart (2008) |
ISOGG Chart
(2008) |
FTDNA
Chart (2008) |
| Subclade |
Defining SNPs |
Subclade |
Defining SNPs |
Subclade |
Defining SNPs |
| I |
P19 P38 M170 M258 |
I |
P19 P38 M170 M258 P212 U179 |
I |
P19 P38 M170 M258 P212 U179 |
| I1 |
all of I and P30 P40 M253 M307 |
I1 |
all of I and P30 P40 M253 M307 |
I1 |
all of I and P30 P40 M253 M307 |
| I2 |
all of I and S31 |
I2 |
all of I and M438/P215/S31 |
I2 |
all of I and P215 |
| I2a |
all of I2 and P37.2 |
I2a |
all of I2 and P37.2 |
I2a |
all of I2 and P37.2 |
| I2a1 |
all of I2a and M26 |
I2a1 |
all of I2a and M423 |
I2a1 |
all of I2a and P41.2/M359 |
| I2a1a |
all of I2a1 and M161 |
I2a1a |
all of I2a1 and P41.2/M359.2 |
I2a2 |
all of I2a and M26 |
| I2a2 |
all of I2a and M423 |
I2a2 |
all of I2a and M26 |
I2a2a |
all of I2a2 and M161 |
| I2a2a |
all of I2a2 and M359/P41.2 |
I2a2a |
all of I2a2 and M161 |
|
|
| I2b |
all of I2 and S23 S30 S32 S33 |
I2b |
all of I2 and M436/P14/S33 P216/S30
P217/S23 P218/S32 |
I2b |
all of I2 and M223 P214
P216 P217 P218 P219 P220 P221 P222/U250 P223 |
| I2b1 |
all of I2b and M223 S24 |
I2b1 |
all of I2b and M223 P219/S24 P220/S119 P221/S120 P222/U250/S118
P223/S117 |
| I2b1a |
all of I2b1 and M284 |
I2b1a |
all of I2b1 and M284 |
I2b1 |
all of I2b and M284 |
| I2b1b |
all of I2b1 and M379 |
I2b1b |
all of I2b1 and M379 |
I2b2 |
all of I2b and M379 |
| I2b1c |
all of I2b1 and P78 |
I2b1c |
all of I2b1 and P78 |
I2b3 |
all of I2b and P78 |
| I2b1d |
all of I2b1 and P95 |
I2b1d |
all of I2b1 and P95 |
I2b4 |
all of I2b and P95 |
|
|