Age: 3,770.7 ± 2,142.5; CI=95% (Behar et al., 2012b)
Origin: Undetermined
Variants: A11065G G16145A
FTDNA Tree: Link
Parent Branch: I2
Descendant branch(s): I2a1 I2a2 I2a3

YFull Info

Name: I2a
Age: 15800 to 12900 ybp [95% CI]
Expansion: 14300 to 7200 ybp [95% CI]
 Variants: A11065G G16145A

Note: This information does not imply an endorsement of YFull or their methods. It is provided at the request of readers.

Haplogroup I2a is a branch on the maternal tree of human kind. Its age is between 1,600 and 5,900 years (Behar et al., 2012b).

mtDNA Haplogroup I2a Phylotree History

Phylotree.org is the maternal (mtDNA) tree of humanity. It is maintained by Dr. Mannis Van Oven. Each build is a major update to the tree. The current build is #17.

Build# Called Variants (Mutations) Notes
04 I2a 11065 Released 10 May 2009
05 I2a 11065 Released 8 Jul 2009
06 I2a 11065 Released 28 Sep 2009
07 I2a 11065 Released 10 Nov 2009
08 I2a 11065 Released 21 Mar 2010
09 I2a 3398 11065 16145 Released 20 Jun 2010
10 I2a 3398 11065 16145 Released 10 Aug 2010
11 I2a 11065 16145 Released 7 Feb 2011
12 I2a 11065 16145 Released 20 Jul 2011
13 I2a 11065 16145 Released 28 Dec 2011; Last Build to use the rCRS
14 I2a A11065G G16145A Released 5 Apr 2012; First version to use the RSRS
15 I2a A11065G G16145A Released 30 Sep 2012
16 I2a A11065G G16145A Released 19 Feb 2014
17 I2a A11065G G16145A Released 18 Feb 2016

mtDNA Haplogroup I2a Data Sources

GenBank Samples

GenBank is a database of genetic sequence data. It is run by the United States National Institute of Health. It serves as the main repository for mtDNA full sequence profiles. Samples come both from published academic literature and donations from genetic genealogy community members. In addition to GenBank samples, listings below may include other samples published but not submitted to GenBank such as those from the HapMap project.

Note: GenBank results currently use Phylotree build 16. I am working on changing results over to build 17.

Hg IDOriginPublicationHg BLD16 Hg BLD17 Hg YFullMissing VariantsAdditional Variants
Hap5004533 Behar et al., 2012b I2a I2a3 none I2a:309.1C, 315.1C, 491, 2835A, 3951, 16074
Hap5007846 - Greenspan et al., 2006 - 2016 I2a - none I2a:309.1C, 315.1C, 4216
Hap5007969 - Greenspan et al., 2006 - 2016 I2a - none I2a:309.1C, 315.1C
Hap5007985 - Greenspan et al., 2006 - 2016 I2a - I2a:207 I2a:309.1CC, 315.1C
Hap5013743 Denmark Raule et al., 2014 I2a I2a3 I2a:573.1XC I2a:309.1C, 315.1C, 2835A, 10667, 16074

Sources & Resources

Related Sources


Additional Resources

mtDNA Consultants

The following members of the community offer paid consulting for those seeking help with mtDNA results. Inclusion on this list is not a recommendation or endorsement of any service.


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