The Norsemen of Scotland

Neil Macphail:

An Oxford University scientist has traced the Y-chromosome, which determines maleness, of the founder of Clan Donald - the great Somerled of Argyll, who was born around 1100 and drove out the Viking invaders.

Geneticist Bryan Sykes says this microscopic fragment of the fearsome fighter still lives on in the DNA of half a million clansmen throughout the world. Indeed Professor Sykes says the Y-chromosome of the Gaelic warrior, who it seems had Norse blood himself, is so prevalent it could be among the most successful in the world.

Prof. Sykes and his team made the discovery almost by accident while they were researching genetic links between the Scots and the Vikings and looking for Norse Y-chromosomes.

He and researcher Jayne Nicholson had taken thousands of DNA samples from men in the Highlands and Western Isles, and spotted a group that stood out.

They were at first puzzled, then Miss Nicholson looked at the donors' names. These revealed that among the men with the identical Y-chromosomes were MacDonalds, MacAlisters and MacDougalls.

Prof. Sykes said: "There didn't seem all that much in it until Jayne said quietly that these clans were related.

"The possibility that this Y-chromosome was inherited from the common ancestor of the MacDonalds, MacDougalls and MacAlisters was incredibly exciting.

They wrote to dozens of those clansmen throughout Scotland, enclosing a sampling brush for them to collect DNA from inside their cheeks. In the samples of those who replied, they found a single common Y-chromosome. To be double sure this was Somerled's, Prof Sykes embarked on a sensitive piece of research involving the living chiefs of the Clan Donald and their septs.

He said: "I wanted to see if the clan chiefs still alive, whose recorded genealogies descend from Somerled, also shared the same chromosome. This was a delicate task. We might find one or more of the chiefs did not have it - meaning one of their paternal ancestors might have been adopted, or had not been the biological father of his heir.

He approached Lord Godfrey Macdonald, Sir Ian Macdonald of Sleat, Ranald MacDonald of Clan Ranald, William McAlester of Loup and Ranald MacDonnell of Glengary, enclosing a DNA brush.

The result was conclusive: 'They all shared the same chromosome. There was now no dought we had identified the legacy of Somerled.'

Now the only one whose lineage is in doubt is Somerled himself. Tradition says he descended from the ancient Irish kings - but Prof. Sykes says the chromosome proves his Norse ancestry.

More on Scotland's Viking ancestry:

Viking gene blamed for women's cancer

MS Linked To Influx Of Scottish Settlers

Donegal Has High Levels Of Multiple Sclerosis