A total of 2110 unrelated European male subjects were examined for the p49a,f TaqI Y-haplotype X. The results showed a remarkable mean peak of haplotype X frequencies (46.9%) among subjects from Croatia, and similar elevated frequency values were also found in their counterparts from Slovenia (41.5%),
Bosnia (40.3%) and ex-Yugoslavia (36.7%). Frequencies of haplotype X decrease towards west (from 41.5% in Slovenia to less than 1% in northern Italy) and south (23.5% in Albania,
15.9% in Serbia, 7.5% in Greece and 2.1% in Crete), but retain relatively high frequencies in Romania (17.9%) and in Bulgaria (16.1%). Historical and genetic evidence allows us to demonstrate that haplotype X originated in Europe among descendants of men who have been associated with the Gravettian culture. During the Last Glacial Maximum the Western Balkan Peninsula constituted a “refuge” for haplotype X, the starting point of an expansion that spread this haplotype around the neighbouring populations in historical times.
http://www.springerlink.com/content/9622148v45547375/