Even if a very specialized detail, this lineage may help to shed light on the colonization of Oceania:
Chris A. Corser et al., The Q2 Mitochondrial Haplogroup in Oceania. PLoS ONE 2012. Open access → LINK [ doi:10.1371/journal.pone.0052022]
AbstractMany details surrounding the origins of the peoples of Oceania remain to be resolved, and as a step towards this we report seven new complete mitochondrial genomes from the Q2a haplogroup, from Papua New Guinea, Fiji and Kiribati. This brings the total to eleven Q2 genomes now available. The Q haplogroup (that includes Q2) is an old and diverse lineage in Near Oceania, and is reasonably common; within our sample set of 430, 97 are of the Q haplogroup. However, only 8 are Q2, and we report 7 here. The tree with all complete Q genomes is proven to be minimal. The dating estimate for the origin of Q2 (around 35 Kya) reinforces the understanding that humans have been in Near Oceania for tens of thousands of years; nevertheless the Polynesian maternal haplogroups remain distinctive. A major focus now, with regard to Polynesian ancestry, is to address the differences and timing of the ‘Melanesian’ contribution to the maternal and paternal lineages as people moved further and further into Remote Oceania. Input from other fields such as anthropology, history and linguistics is required for a better understanding and interpretation of the genetic data.
|Figure 2. Overview of the Q haplogroup.|
The dataset has 36 mitochondrial genomes including all eight Q3 sequences, 17 Q1, three Q2 genomes from Friedlaender et al. , one from Hudjashov et al. , together with the seven additional Q2a genomes reported here. The network has been proved the shortest possible (the minimum number of mutations) by using the techniques in Pierson et al. . Differences in branching between the four equally parsimonious trees occur in the Q3 subgroup.
See also in this blog:
- Ancient DNA... of chickens (Oceanian chickens, that's it)