There's a new paper, The Peopling of Korea Revealed by Analyses of Mitochondrial DNA and Y-Chromosomal Markers:
Methodology and Results We analyzed mitochondrial DNA...sequence variation in the hypervariable segments I and II...and haplogroup-specific mutations in coding regions in 445 individuals from seven east Asian populations...In addition, published mtDNA haplogroup data...mtDNA HVS-I sequences...Y chromosome haplogroup data...and Y chromosome STR da...were analyzed to elucidate the genetic structure of East Asian populations. All the mtDNA profiles studied here were classified into subsets of haplogroups common in East Asia, with just two exceptions. In general, the Korean mtDNA profiles revealed similarities to other northeastern Asian populations through analysis of individual haplogroup distributions, genetic distances between populations or an analysis of molecular variance, although a minor southern contribution was also suggested. Reanalysis of Y-chromosomal data confirmed both the overall similarity to other northeastern populations, and also a larger paternal contribution from southeastern populations. Conclusion The ...
