Refining Your Haplogroup
To obtain more specific information about their haplotype, I and I1 participants can order a deep clade test through their personal page at FTDNA following the link for "Haplotree" in the left menu. Sometimes new markers (SNPs) are made available for testing as new branches are identified. Any further testing options currently available to refine your haplogroup will always show at your personal page under "Haplotree."
"I is the oldest haplogroup in Europe and in all probability the only one that originated there (apart from deep subclades of other haplogroups). It is thought to have arrived from the Middle East as haplogroup IJ around 35,000 years ago, and developed into haplogroup I approximately 25,000 years ago. This means that Cro-Magnons most probably belonged (exclusively?) to IJ or I. Nowadays haplogroup I accounts for 10 to 45% of the population in most of Europe. It is divided in four main subclades. The megalithic structures (5000-1200 BCE) of Europe were built by I people." [1]
"I1-M253 et al has highest frequency in Scandinavia, Iceland, and northwest Europe. In Britain, haplogroup I1-M253 et al is often used as a marker for "invaders," Viking or Anglo-Saxon. The I1b-M227 subclade is concentrated in eastern Europe and the Balkans and appears to have arisen in the last one thousand to five thousand years. It has been reported in Germany, Czech Republic, Poland, Estonia, Ukraine, Switzerland, Slovenia, Bosnia, Macedonia, Croatia, and Lebanon.
"I2-M438 et al includes I2* which shows some membership from Armenia, Georgia and Turkey; I2a-P37.2, which is the most common form in the Balkans and Sardinia; I2a2-M26 is especially prevalent in Sardinia. I2b-M436 et al reaches its highest frequency along the northwest coast of continental Europe. I2b1-M223 et al occurs in Britain and northwest continental Europe. I2b1a-M284 occurs almost exclusively in Britain, so it apparently originated there and has probably been present for thousands of years." [2]
Haplogroup I1 Distribution in Europe [3]
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1. Eupedia.com.
2. International Society of Genetic Genealogy (2010). Y-DNA Haplogroup Tree 2010, Version: 5.00, Date: 1 January 2010, http://www.isogg.org/tree/ 4 January 2010.
3. Eupedia.com.