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Date Posted: 09:20:32 04/18/11 Mon
Author: Ileana
Subject: STAM Line Info

I believe that Stam or Stem line is Mitochondrial DNA (mtDNA). In this case it is of the Friesian Horse passed along by the mares. (If anyone disagrees or has better information, I would welcome a reply).

If you google Mitochondrial DNA it states "Mitochondrial DNA (mtDNA) is contained in the cytoplasm of the cell, rather than the nucleus. This type of DNA is passed by a mother to both male and female offspring without any mixing, so the mtDNA is the same as the mother's mtDNA, which is the same as her mother's mtDNA. mtDNA changes very slowly so it cannot determine close relationships as well as it can determine general relatedness. If two horses have an exact match in their mtDNA, then there is a very good chance they share a common maternal ancestor, but it is hard to determine if this is a recent ancestor or one who lived hundreds of years ago. It is important to keep in mind with this test that a male's mtDNA comes only from his mother and is not passed on to his offspring."

A good site for Stam line information is http://www.signaturefriesians.com/motherlines.htm

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