TY - JOUR A1 - Pereira, Luísa A1 - Richards, Martin A1 - Goios, Ana A1 - Alonso, Antonio A1 - Albarrán, Cristina A1 - Garcia, Oscar A1 - Behar, Doron M. A1 - Gölge, Mukaddes A1 - Hatina, Jiři A1 - Al-Gazali, Lihadh A1 - Bradley, Daniel G. A1 - Macaulay, Vincent A1 - Amorim, António T1 - High-resolution mtDNA evidence for the late-glacial resettlement of Europe from an Iberian refugium Y1 - 2005/01/01 JF - Genome Research JO - Genome Research SP - 19 EP - 24 DO - 10.1101/gr.3182305 VL - 15 IS - 1 UR - http://genome.cshlp.org/content/15/1/19.abstract N2 - The advent of complete mitochondrial DNA (mtDNA) sequence data has ushered in a new phase of human evolutionary studies. Even quite limited volumes of complete mtDNA sequence data can now be used to identify the critical polymorphisms that define sub-clades within an mtDNA haplogroup, providing a springboard for large-scale high-resolution screening of human mtDNAs. This strategy has in the past been applied to mtDNA haplogroup V, which represents <5% of European mtDNAs. Here we adopted a similar approach to haplogroup H, by far the most common European haplogroup, which at lower resolution displayed a rather uninformative frequency distribution within Europe. Using polymorphism information derived from the growing complete mtDNA sequence database, we sequenced 1580 base pairs of targeted coding-region segments of the mtDNA genome in 649 individuals harboring mtDNA haplogroup H from populations throughout Europe, the Caucasus, and the Near East. The enhanced genealogical resolution clearly shows that sub-clades of haplogroup H have highly distinctive geographical distributions. The patterns of frequency and diversity suggest that haplogroup H entered Europe from the Near East ∼20,000–25,000 years ago, around the time of the Last Glacial Maximum (LGM), and some sub-clades re-expanded from an Iberian refugium when the glaciers retreated ∼15,000 years ago. This shows that a large fraction of the maternal ancestry of modern Europeans traces back to the expansion of hunter-gatherer populations at the end of the last Ice Age. ER -