Rare human mitochondrial HV lineages have played a significant role in shaping the population history of Eurasia, particularly through migratory events connecting the Near East to Europe following the Last Glacial Maximum (LGM). In a study utilizing 315 HV(xH,V) mitogenomes, including 27 newly identified contemporary lineages, distinctive genetic signatures were uncovered, highlighting movements from the Near East and South Caucasus towards Europe and South Asia. The phylogeographies of these rare HV(xH,V) subclades indicate connections between the Italian Peninsula and the South Caucasus, originating from multiple waves of migration post-LGM and during the Neolithic period. Many of these subclades trace back to a population ancestral to present-day Armenians and Assyrians. For instance, the HV1b-152 subclade supports a northern Mesopotamian origin for the Ashkenazi HV1b2 lineages, post-exile.
The haplogroup HV holds a pivotal position in human mitochondrial phylogeny, being the ancestral clade to haplogroup H, the most common clade in Europe. Comprising numerous sublineages, including HV0, HV1, HV4, and more, HV lineages are geographically dispersed across Eurasia and North Africa. While HV(xH,V) lineages are rare in northern and western Europe, they are more prevalent in southern and eastern regions, with peak frequencies observed in Belarus, Bulgaria, and Italy. The presence of HV(xH,V) in the Near East and Caucasus is notable, with the highest frequencies reported in Iran, Iraq, and South Caucasus countries like Armenia and Azerbaijan.
Examining the subclades within HV*(xH,V) sheds light on ancient migratory events and demographic patterns. The study revealed distinct patterns in the distribution and coalescence of subclades, with some lineages showing a connection between Italian and Near Eastern populations, while others are absent in Europe, primarily found in the Near East and South Asia. Notably, the phylogeography of subclades like HV1a1, HV1a2, and HV1b indicates post-Glacial migrations from the Near East to Europe, with potential routes from the South Caucasus or northern Mesopotamia. On the other hand, subclades such as HV1b3 and HV18 suggest a Neolithic expansion into Europe, possibly originating from populations in Anatolia and the Caucasus.
The study also delves into the migration patterns of non-European HV*(xH,V) subclades, particularly HV12 and HV14, revealing connections between the Iranian plateau and South Asia. The ages and geographic distributions of these subclades point to pre-Neolithic migrations from Iran to South Asia, offering insights into ancient human movements in the region. Furthermore, the exploration of specific subclades like HV1b2 provides clues to the origins of Ashkenazi Jewish lineages, suggesting ties to northern Mesopotamia and historical events like the Assyrian and Babylonian captivities.
In conclusion, the study showcases the intricate web of migration and genetic diversity captured within rare human mitochondrial HV lineages, highlighting the complex interplay of historical events, population movements, and genetic heritage across Eurasia and North Africa. By unraveling the phylogeography of HV*(xH,V) subclades, the research contributes to a deeper understanding of human population history and the intricate tapestry of genetic connections that span continents and millennia.
- The study uncovers distinctive genetic signatures in rare HV*(xH,V) lineages originating from the Near East and Caucasus.
- Migration patterns from the Near East to Europe post-LGM and during the Neolithic period are elucidated through phylogeographic analysis.
- Non-European HV*(xH,V) subclades reveal pre-Neolithic migrations from the Iranian plateau to South Asia.
- Insights into the origins of Ashkenazi Jewish lineages are provided, linking back to historical events in northern Mesopotamia.
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