The following two figures summarize the new phylogenetic information:
The discovery of new haplogroup C7 in Italian is potentially important, since it may mean that haplogroup C --for which region-specific clades covering East Asia (with an American twig), South Asia, Australasia are known-- may have also been present natively in Europe. It will certainly be interesting to resolve occasional C chromosomes that have been occasionally found in West Eurasia at a finer level, and do some whole-Y sequencing on the different C clades to figure out exactly how they are phylogenetically related.
It is also interesting to note that the geographical origin of the human Y-chromosome phylogeny (NW Africa) is discordant with that of mtDNA (apparently in the Khoe-San of South Africa). This underscores the futility of trying to determine "where" modern humans originated in a geographically circumscribed area.
PLoS ONE 7(11): e49170. doi:10.1371/journal.pone.0049170
The discovery of new haplogroup C7 in Italian is potentially important, since it may mean that haplogroup C --for which region-specific clades covering East Asia (with an American twig), South Asia, Australasia are known-- may have also been present natively in Europe. It will certainly be interesting to resolve occasional C chromosomes that have been occasionally found in West Eurasia at a finer level, and do some whole-Y sequencing on the different C clades to figure out exactly how they are phylogenetically related.
It is also interesting to note that the geographical origin of the human Y-chromosome phylogeny (NW Africa) is discordant with that of mtDNA (apparently in the Khoe-San of South Africa). This underscores the futility of trying to determine "where" modern humans originated in a geographically circumscribed area.
Molecular Dissection of the Basal Clades in the Human Y Chromosome Phylogenetic Tree
Rosaria Scozzari et al.
One hundred and forty-six previously detected mutations were more precisely positioned in the human Y chromosome phylogeny by the analysis of 51 representative Y chromosome haplogroups and the use of 59 mutations from literature. Twenty-two new mutations were also described and incorporated in the revised phylogeny. This analysis made it possible to identify new haplogroups and to resolve a deep trifurcation within haplogroup B2. Our data provide a highly resolved branching in the African-specific portion of the Y tree and support the hypothesis of an origin in the north-western quadrant of the African continent for the human MSY diversity.
Link