Y-DNA Haplogroup I Naming Nomenclature
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As the research in I subclades progresses, the scientific community routinely renames existing subclades to accommodate rapid growth of the Y-DNA phylogenetic tree.  That means that as research progresses, your I subclade will continuously be re-assigned the latest name using the latest naming system. 

If the name of your I Subclade changes, it does not mean that your results or SNPs have changed.  It simply means that the name of your I Subclade has been updated to keep up with the latest naming nomenclature in this field. 

Latest Updates:

February 27, 2009:  New Haplogroup Assignment.  The first batch of results for the new Haplogroup I subclade panel has now become available.  If you had previously taken Version 1 of the I Subclade panel (19 SNP markers), you will receive a complimentary upgrade to the new Version 2 which contains 22 SNPs (i.e. 3 new SNPs will be tested for you for free).  The results of the 3 new SNPs can be viewed from the Raw DNA section of your account (within the I Subclade panel).  If you test positive for one of the 3 new SNP markers, you may receive a further refinement to your I subclade.  Your I subclade will be automatically reassigned if the results of the 3 new SNPs provide further refinement in your situation. 

How will the results of the 3 new SNPs affect my subclade?
1.  If you test positive for L22 as your terminal SNP and had previously tested positive for M258 and M253, then you will be automatically classified as I1d.
2.  If you test positive for L69=T as your terminal SNP and had previously tested positive for M258, M438, P37.2 and M425, then you will be automatically classified as I2a2b.
3.  If you test positive for L38 as your terminal SNP and had previously tested positive for M258, M438, M436, then you will be automatically classified as I2b2.

Please note that if you test positive for L22 or L69=T or L38 but negative for the SNPs leading to the terminal SNP (i.e. upstream SNPs), then you will not be reclassified, even the one or more of the new SNPs is positive. 

February 27, 2009:  New naming nomenclature for I.  The I Subclade naming nomenclature has been updated according to the latest naming system.  All participants in the system will be automatically assigned the latest Subclade name using the new naming system.  Please refer to the following table to view the old and the new names for the various Subclades of Haplogroup I:

Y-DNA I Subclade

(Nomenclature v2.0)

Terminal Y-SNP

(I subclade panel)

Y-DNA I Subclade

(Nomenclature v1.0)

I*

M258 (2004)

I*

I1

M253 (2004)

I1

I1a

M21 (2001)

I1a

I1b

M227 (2004)

I1b

I1b1

M72 (2000)

I1b1

I1c

P259 (May 2008)

I1d

I1d

L22 (Dec 2008)

 

I1d1

P109 (May 2008)

I1c

I2

M438 (May 2008)

I2

I2a

P37.2 (2002)

I2a

I2a1

M26 (2004)

I2a2

I2a1a

M161 (2000)

I2a2a

I2a2

M423 (May 2008)

I2a1

I2a2a

P41.2 (2002)

I2a1a

I2a2b

L69=T (Jan 2009)

 

I2b

M436 (May 2008)

I2b

I2b1

M223 (2001)

I2b1

I2b1a

M284 (2004)

I2b1a

I2b1b

M379 (2006)

I2b1b

I2b1c

P78 (2005)

I2b1c

I2b1d

P95 (2005)

I2b1d

I2b2

L38 (Dec 2008)

 

The three new subclades defined by the 3 new SNPs are shown in "red" text in the table above.
Subclades that have received an updated name are shown in "blue" text in the table above.

I Subclade Assignment Table

The following table summarizes how the various subclades of I are currently assigned based on SNP results:

Subclade

Mutations

Previous nomenclature

I*

M258
(2004)

 

 

 

 

I*

I1

M258
(2004)

M253
(2004)

 

 

 

I1

I1a

M258
(2004)

M253
(2004)

M21
(2001)

 

 

I1a

I1b

M258
(2004)

M253
(2004)

M227
(2004)

 

 

I1b

I1b1

M258
(2004)

M253
(2004)

M227
(2004)

M72
(2000)

 

I1b1

I1c

M258
(2004)

M253
(2004)

P259
(May 2008)

 

 

I1d

I1d

M258
(2004)

M253
(2004)

L22
(Dec 2008)

 

 

 

I1d1

M258
(2004)

M253
(2004)

P109
(May 2008)

 

 

I1c

I2

M258
(2004)

M438
(May 2008)

 

 

 

I2

I2a

M258
(2004)

M438
(May 2008)

P37.2
(2002)

 

 

I2a

I2a1

M258
(2004)

M438
(May 2008)

P37.2
(2002)

M26
(2004)

 

I2a2

I2a1a

M258
(2004)

M438
(May 2008)

P37.2
(2002)

M26
(2004)

M161
(2000)

I2a2a

I2a2

M258
(2004)

M438
(May 2008)

P37.2
(2002)

M423
(May 2008)

 

I2a1

I2a2a

M258
(2004)

M438
(May 2008)

P37.2
(2002)

M423
(May 2008)

P41.2
(2002)

I2a1a

I2a2b

M258
(2004)

M438
(May 2008)

P37.2
(2002)

M423
(May 2008)

L69(=T)
(Jan 2009)

 

I2b

M258
(2004)

M438
(May 2008)

M436
(May 2008)

 

 

I2b

I2b1

M258
(2004)

M438
(May 2008)

M436
(May 2008)

M223
(2001)

 

I2b1

I2b1a

M258
(2004)

M438
(May 2008)

M436
(May 2008)

M223
(2001)

M284
(2004)

I2b1a

I2b1b

M258
(2004)

M438
(May 2008)

M436
(May 2008)

M223
(2001)

M379
(2006)

I2b1b

I2b1c

M258
(2004)

M438
(May 2008)

M436
(May 2008)

M223
(2001)

P78
(2005)

I2b1c

I2b1d

M258
(2004)

M438
(May 2008)

M436
(May 2008)

M223
(2001)

P95
(2005)

I2b1d

I2b2

M258
(2004)

M438
(May 2008)

M436
(May 2008)

L38
(Dec 2008)

 

 

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Y-DNA Haplogroup I Naming Nomenclature. Genebase Tutorials. Retrieved October 23, 2014, from http://www.genebase.com/learning/article/60
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