17/08/2022

Original DFB – Migrations

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By tracking the mutations present in my DNA the Genographic Project can suggest something of the route that my antecedents must have taken. Once again the surprise is quite how far afield we Dentons have wandered.

My paternal migration route can be established by identifying where certain mutations first occurred. Modern humans emerged from the Rift Valley. Around 100,000 years ago and still in East Africa my first mutated marker occurs – P305. This is none too surprising as 99.99% of all of today’s paternal lineages have this marker.

My next paternal marker is the M42 version dated to around 80,000 years ago. This is still based in East Africa but those with M42 would migrate from there to the north, south and west. Some M42s have not migrated that far and remain the traditional hunter-gatherers in the eastern Congo, the Mbuti pygmies who live in the Itun tropical rainforest (just 30-40,000 remain), the western Congo BiAaka pygmies (also around 30,000 remain) and the north-central Tanzanian Hadza who live around Lake Eyasi in the central Rift Valley and Serengeti (only 1,000 remain) – all have the M42 marker.

Mitochondrial Eve’s female descendants experienced genetic mutations that established two new distinct lineages designated as LO and the rather inelegantly named L1’2’3’4’5’6 group. Both these descendant groups are found only in Africa. The L1’2’3’4’5’6 group however, after further mutation, led to the creation of the L3 haplogroup around 72,000 years ago. This is in my maternal lineage. It also started out in East Africa. Many with L3 lineage remained in Africa and proved predominant in the Bantu-speaking groups of west-central Africa along the Niger-Congo where there are some 650 Bantu languages and dialects. L3s also dispersed south via today’s Mali to South Africa.

But for our purpose it is the L3 haplotype group which is specifically present in all the northern migrations that led out of Africa. Much later there were enforced L3 migrations due to the Atlantic slave trade from West Africa to the Americas and Caribbean. For this reason L3 is present in many African-Americans too.

My paternal migration – map courtesy of scaledinnovation.com

The next mutation on my paternal side was the M168 marker occurring around 70,000 years ago in north-east Africa; my ancestor probably lived in Tanzania, Kenya or Ethiopia. M168 is present in every non-African man living today. This mutation occurred around the time there was a leap in human intellectual capacity that led us to develop tools and weapons and to evolve a language.

My paternal ancestors appear to have migrated from the Horn of Africa crossing the 30kms (20-mile) strait (at the junction of the Red Sea and the Gulf of Aden) from today’s Djibouti and Eritrea into Yemen. Named the Bab-al Mandeb strait, it means ‘Gate of Tears’ derived from an Arab legend of the many who died when an earthquake separated Ethiopia and Arabia. Today almost 10% of the oil moved by tankers passes through this strait.

I find it intriguing that my father spent time in Eritrea during WWII (as RAF ground crew), though he could not have known that he was tracing his ancestral roots. His stories of that time focused on the horros of the insects he encountered.

My paternal lineage then had a further mutation to create the P143 haplogroup at around 60,000 years ago. This was the first recorded to have happened outside Africa, if only just outside in the Jeddah, Mecca and Medina region of today’s Saudi Arabia.

Around 55,000 years ago the M89 mutation occurred in the Middle East. Many remained where they were, others travelled through today’s Iran to the Caucasus and the steppes of Central Asia. One small group went north and through Anatolia to the Balkans. My paternal ancestor went north to the Black and the Caspian Seas.

Plot of the mutation markers that describe the routes of my maternal antecedents (red) and paternal antecedents (blue) taken from Africa to Europe. (Note the above plot by scaledinnovations shows a different start point and a marginally different route for my paternal migration). The codes shown are the haplotypes, the numbers the approximate number of years ago they would have been in that region.

In the meantime my maternal ancestors (red arrows) had travelled up the Nile valley or beside the Red Sea and crossed into the Sinai Peninsula. Here these northern L3 migrants generated further mutations around 60,000 years ago to form two new haplogroups, M and N, which between them would maternally populate the rest of the world outside Africa.

Around 50,000 years ago the M578 marker occurred on the present-day Iraq-Saudi border. One group of these set off eastward populating India and Southeast Asia and eventually reaching Australia; these were also the ancestors of some of today’s Australian Aborigines.

My maternal lineage was the N haplogroup that originated around today’s Duba and Tabuk in Saudi Arabia. After a few thousand years settled in the Levant these ancestors once more pursued migration. Some migrated westward through present-day Turkey and the eastern Mediterranean, others went eastward through central Asia to be found in the Indus Valley. My maternal antecedents however spread north through today’s Jordan, Syria, Iraq and Iran. My mother’s ancestors then travelled up towards today’s Tabriz in north-west Iran where the next mutation happened some 55,000 years ago to generate the haplogroup R.

The next maternal mutation occurred at 47,000 years ago creating the U haplotype. These were my mother’s antecedents who continued northwards past the Caspian Sea to its west and through today’s Armenia, Azerbaijan and Georgia. They then turned westward passing above the Black Sea through today’s southern Russia.

The K haplotype occurred some 27,000 years ago in today’s Ukraine near Mariupol, followed by the K2 marker 21,000 years ago. The K2a marker happened around 11,500-6,800 years ago at the time when PPNA (Pre-Pottery Neolithic A) groups were emerging, the very beginnings of the archaeological record.

Meanwhile my paternal lineage had its next mutation, the P128 haplogroup, 45,000 years ago and some distance north of today’s Kabul on the Afghanistan-Tajikistan border. Half of all non-Africans derive from this lineage. The P128 haplotype then split three ways – into the O group that is the most common in East Asia, the Q group that is the major lineage in the Americas, and ‘my’ R group, the major lineage in Europe and Central Asia. My paternal lineage appears to have added the M526 mutation and continued eastward into western China some 42,000 years ago.

Some 35,000 years ago the M45 mutation saw my paternal lineage moving in small big-game hunting groups onto the open savannah, travelling north-west across Kyrgyzstan and Kazakhstan. M45 went on to create the Q and R groups (see above) that eventually populated the planet.

One M45 descendant group is mostly found in India – the Saora from Andhra Pradesh, the Bhumji from Assam, West Bengal, Odisha and Jharkhand and Muslim groups in the far north-east of Manipur.

Around 30,000 years ago the M207 marker would be the stepping stone to several important groups, though none of them mine –the R-M432 from which most western European men derive and R-L62 which is common in eastern Europe and India.

My paternal lineage went down the P231 route around 25,000 years ago as they travelled across southern Russia and Belarus into Europe collecting new markers as they went. Research is still ongoing and the next five markers in my male lineage present a confused picture:

  • M343 emerging 22,000-17,000 years ago represents 7% of Russian males (including Tsar Nicholas II), 13% of males in the Balkans, 21% of Eastern Europeans, 43% of Central Europeans and 55-58% of Western Europeans
  • M269 between 15,000 and 6,500 years ago is present in 5% of males in Kazakhstan, 6-8% of those in Turkey, 13-14% of Greeks, 32% of Germans, 85% of the Welsh and 90% of east-coast Irish
  • P310 is present in just 1-2% of males in Iran, Kazakhstani and Lebanon, 5% in Oman, 8% in Italy, 38% in Spain, 45% in France and 48-52% in Ireland
  • U106, from as early as 14,000 until 4,250 years ago, appears strong in Benelux – 14% presence in the Netherlands, 13% in Luxembourg and 12% in Belgium – just 6-9% in the UK, 4-5% in Cyprus and just 1-2% in Italy and Spain
  • L48, 7% of Belgian males, 4% of Netherlands, 3-4% in England, 3% in Denmark and Switzerland and 2-3% in Germany. The geneticists provide a ‘heat map’ that shows U106 is particularly present in Western Europe.

I don’t believe there is any way that I can seek to fill the gap from DNA’s 2,500 BCE to Sims of Yetherham in 935 CE. But these migration journeys are interesting.

I am editing this section during the Russian invasion of Ukraine (2022) and the devastation of the city of Mariupol is headline news, so the notion that my maternal antecedents were experiencing the K haplotype changes there 27,000 years ago is thought-provoking.

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