What is subclade testing?

Subclade testing can provide increased resolution of your placement on the Y-chromosome phylogenetic tree.  Before your subclade can be determined, you must first know what haplogroup you fall into.  Haplogroups are defined by a unique mutation event such as a single nucleotide polymorphism, or SNP.  These SNPs mark the branch of a haplogroup, and indicate that all descendents of that haplogroup at one time shared a common ancestor.  The Y-DNA SNP mutation has been passed from father to son over thousands of years.  Over time, additional SNPs may occur within a haplogroup, leading to a new lineage.  These new lineages are considered subclades of the haplogroup.  Each time a new mutation occurs, there is a new branch in the haplogroup, and therefore a new subclade.  By testing for the presence of SNPs that have been identified as being indicative of a subclade within a haplogroup, you can now determine which specific subclade you belong to within your previously determined haplogroup.

What are the Subclades of Haplogroup J?

The origin of Haplogroup J maps to the Middle East around the ‘Fertile Crescent’, an area also known as the ‘Cradle of Civilization’ since this area saw the birth of many technological advancements that helped humans move from nomadic hunter-gatherers to an agriculture-based society living in one place.  The sprouting of some the first cities and empires in human history were contingent on these developments and featured the proliferation of Haplogroup J.   

The further refinement of Y-chromosome ancestry can be obtained by using the Y-chromosome Haplogroup J Subclade Testing Panel from Genebase.  This panel is based upon a collection of 33 SNPs that identify 33 different subclades of Y-chromosome haplogroup J.   The phylogenetic relationships for the J subclade branches are also provided in the figure below.



Description of the panel

The Y-DNA Haplogroup J Subclade Test consists of a panel of 33 SNP markers.  These markers are used to define the 33 different subclades in Haplogroup J.  The location of the SNP, the actual mutation that is detected, and the subclade that they define is listed below for each of the markers in the panel.