Anfänger
14-02-19, 13:38
Since i could not find any thread related to my maternal lineage i am going to start this one.
This is what i have found so far :
Origin and spread of human mitochondrial DNA Haplogroup U7 (2017)
-https://www.nature.com/articles/srep46044
Some interesting parts from this paper:
Compared to other subclades of hg U, both the phylogenetic structure and the ancestral origin of hg U7 are rather obscure. This haplogroup is characterized by generally low population frequencies and limited sequence diversity, despite a geographic distribution ranging from Europe to India. Recently, it has been detected in skeletal remains from Southwest Iran dated ~six thousand years ago (kya) well as in remains from the Tarim Basin in Northwest China (3.5–4.0 kya). It has been previously shown that low-frequency mitochondrial haplogroups with relict distributions, similar to hg U7, can be disproportionately informative about ancient human dispersal events.
Another major episode of gene flow affecting the European gene pool appears to have occurred during the Late Neolithic and Early Bronze Age, from a source in the Pontic-Caspian Steppe region north of the Caucasus. It has been suggested that this migration resulted in a further substantial shift in the genetic profile of Europeans and was a major vehicle for the movement of Indo-European languages to Europe, and likely also to South Asia. Interestingly, the autosomal genetic component in Europeans considered to derive from the Steppe is almost fixed in two pre-Neolithic ancient genomes from the South Caucasus. This component is distributed eastwards towards South Asia as well, where it mimics the distribution of U7 (Pearson’s r = 0.65, p = 0.01). Our time estimates for the expansion and differentiation of hg U7 in the Near East, Central Asia, South Asia, and Europe, however, predate these putative late Neolithic-early Bronze Age migrations and thereby rule them out as a major vehicle for the spread of U7 to Europe and South Asia. In this respect, it is also noteworthy that Yamnaya herders of the Steppe so far analysed (n = 43) show no traces of U7 – and U7 is rarely found in this region today.
When i read Wang et al (2018) i found that there was indeed U7 mtDNA in the Steppe group, whereas it was not in the Caucasus group.
From wikipedia :
"Genetic analysis of individuals associated with the Late Hallstatt culture (https://en.wikipedia.org/wiki/Hallstatt_culture) from Baden-Württemberg Germany considered to be examples of Iron Age (https://en.wikipedia.org/wiki/Iron_Age) "princely burials" included haplogroup U7. Haplogroup U7 was reported to have been found in 1200-year-old human remains (dating to around 834), in a woman believed to be from a royal clan who was buried with the Viking Oseberg Ship (https://en.wikipedia.org/wiki/Oseberg_Ship) in Norway. Haplogroup U7 was found in 1000-year-old human remains (dating to around AD 1000-1250) in a Christian cemetery is Kongemarken Denmark. However, U7 is rare among present-day ethnic Scandinavians."
This is what i have found so far :
Origin and spread of human mitochondrial DNA Haplogroup U7 (2017)
-https://www.nature.com/articles/srep46044
Some interesting parts from this paper:
Compared to other subclades of hg U, both the phylogenetic structure and the ancestral origin of hg U7 are rather obscure. This haplogroup is characterized by generally low population frequencies and limited sequence diversity, despite a geographic distribution ranging from Europe to India. Recently, it has been detected in skeletal remains from Southwest Iran dated ~six thousand years ago (kya) well as in remains from the Tarim Basin in Northwest China (3.5–4.0 kya). It has been previously shown that low-frequency mitochondrial haplogroups with relict distributions, similar to hg U7, can be disproportionately informative about ancient human dispersal events.
Another major episode of gene flow affecting the European gene pool appears to have occurred during the Late Neolithic and Early Bronze Age, from a source in the Pontic-Caspian Steppe region north of the Caucasus. It has been suggested that this migration resulted in a further substantial shift in the genetic profile of Europeans and was a major vehicle for the movement of Indo-European languages to Europe, and likely also to South Asia. Interestingly, the autosomal genetic component in Europeans considered to derive from the Steppe is almost fixed in two pre-Neolithic ancient genomes from the South Caucasus. This component is distributed eastwards towards South Asia as well, where it mimics the distribution of U7 (Pearson’s r = 0.65, p = 0.01). Our time estimates for the expansion and differentiation of hg U7 in the Near East, Central Asia, South Asia, and Europe, however, predate these putative late Neolithic-early Bronze Age migrations and thereby rule them out as a major vehicle for the spread of U7 to Europe and South Asia. In this respect, it is also noteworthy that Yamnaya herders of the Steppe so far analysed (n = 43) show no traces of U7 – and U7 is rarely found in this region today.
When i read Wang et al (2018) i found that there was indeed U7 mtDNA in the Steppe group, whereas it was not in the Caucasus group.
From wikipedia :
"Genetic analysis of individuals associated with the Late Hallstatt culture (https://en.wikipedia.org/wiki/Hallstatt_culture) from Baden-Württemberg Germany considered to be examples of Iron Age (https://en.wikipedia.org/wiki/Iron_Age) "princely burials" included haplogroup U7. Haplogroup U7 was reported to have been found in 1200-year-old human remains (dating to around 834), in a woman believed to be from a royal clan who was buried with the Viking Oseberg Ship (https://en.wikipedia.org/wiki/Oseberg_Ship) in Norway. Haplogroup U7 was found in 1000-year-old human remains (dating to around AD 1000-1250) in a Christian cemetery is Kongemarken Denmark. However, U7 is rare among present-day ethnic Scandinavians."