J1-M267 Y lineage marks climate-driven pre-historical human displacements

J1-M267 Y lineage marks climate-driven pre-historical human  displacements

Sergio Tofanelli et al.
The present day distribution of Y chromosomes bearing the haplogroup J1 M267*G variant has been associated with different episodes of human demographic history, the main one being the diffusion of Islam since the Early Middle Ages. To better understand the modes and timing of J1 dispersals, we reconstructed the genealogical relationships among 282 M267*G chromosomes from 29 populations typed at 20 YSTRs and 6 SNPs. Phylogenetic analyses depicted a new genetic background consistent with climate-driven demographic dynamics occurring during two key phases of human pre-history: (1) the spatial expansion of hunter gatherers in response to the end of the late Pleistocene cooling phases and (2) the displacement of groups of foragers/herders following the mid-Holocene rainfall retreats across the Sahara and Arabia. Furthermore, J1 STR motifs previously used to trace Arab or Jewish ancestries were shown unsuitable as diagnostic markers for ethnicity.

[j1.jpg]

One to add to the J page. I ‘ll have to access the paper later- so no deep insights on this one as yet. Take a month of sick and you do get behind with this stuff.

9 responses to “J1-M267 Y lineage marks climate-driven pre-historical human displacements

  1. Wow! This paper seems to be a jewel, pity it’s behind paywall.

    Not just Tofanelli’s claims about the old age of J1 are most intriguing and in agreement with what I do already suspect but the map you posted is most fascinating too:

    1. The apparent presence of J1 in SE Asia, notably in Vietnam and Cambodia, if accurate, makes the Semitic or even Neolithic origin most unlikely. Together with the oddly fragmented distribution of J2b (mostly European and South Asian but rare in West Asia) makes me thing of some ancient migrations at a time when all the southern Asian corridor was still very much entangled.

    2. The enclave of J1 in mainland Northern Europe is way too similarly looking to the area of highest concentration of I2b, so maybe they would have travelled together there.

    • I need to get my hand on the full text dammit!! I’ll add it to my J page when I can see the whole of it.

      I always suspected J1 was older than usually thought. But then that’s my claim for most Y chr dates, they are usually impossibly young. So much for a 60k Adam.

  2. I have the full text uploaded at anthroforum, Mathilda.

    http://anthroforum.com/showthread.php?p=130322#post130322

    The study is so-so. It doesn’t tell us much more than we already knew (and doesn’t test P58, unfortunately, which will likely cover most of what’s J1*-M267). The supplemental data is free and great, though:

    http://www.nature.com/ejhg/journal/vaop/ncurrent/suppinfo/ejhg200958s1.html

    • I have the full text uploaded at anthroforum, Mathilda

      Thank you Ezana. I’ll look at it when I don’t feel like crap.

  3. Wow, Ezana: great info!

    On one side it seems nearly all the J1 of this study is J1* – J1(xJ1a-e). This is quite interesting in itself because it means that the detected sublineages are not that meaningful.

    I have not yet taken a deep look at the table but within the apparent haplotypes marked by you, it seems interesting that there are two that looks Caucasian (red and dark red), another one that looks West Asian/North African/Portuguese (blue) and yet another one that looks mostly Italian (yellow, but connected with Kurdistan and Ethiopia somehow).

  4. naturescorner1

    It is not that hard to explain-Southwest Asia is part of the Arab Middle East-J1 could have easily made an apearance in South East Asia through Arab/Muslim trade and intermingling. Since J1 predominates in the Middle East more so than in South East Asia, I would be very surprised to fin the flow from South East into South West Asia(MiddleEast).

  5. P58- SNP test is a must, logic agrees with the below study

    A predominantly Semitic origin of Halpgroup J1 (M267) in North Africa

    Yonan et al. 2008

    Abstract
    Northwest Africa & the HOA, both regions that provide a suitable region for examination of the demographic impact of the semitic speakers in contrast to non semitic speakers, because its complex recent history of both regions involved a permanent co-existance of two different populations with distinct geographical origins and their own particular languages -North African berbers and Somali/Oromo speakers in contrast to Arabic/Amharic semitic speakers. To address this issue, we analyzed Y chromosome haplotypes of 735* Semitic & non-Semitic speaking males from Northwest Africa & the HOA. While the data clearly shows that the bigger portion of the Semitic population adapted their haplotypes from the native genepool it also shows a minor contribution into the non-semitic speaking north Africans ruling out the theory of a predominant neolithic origin of J1 (M267) in North Africa.

    Results: J1-M267 frequency shows a positive correlation with Ethno-Semitic populations

    Semitic Speakers

    Algerians J1 = 35.0%
    Tunisians J1 = 31.0%
    E-Amhara J1 = 33.3%
    Non-Semitic Speakers

    Berbers J1 = 7.2%
    E-Oromo J1 = 2.6%
    Somalis J1 = 2.5%
    *Data obtained from: Arredi et al. (2004), Bosch et al. (2001) Cruciani et al. (2002), Semino et al. (2004), Sanchez et al. (2005)

  6. Don’t agree with you naturescorner1. SE Asia and SW Asia are as different as can be like you from a Hottentot. You overrate the Muslims, and Arabs particularly Arabian Arabs as distinct with the other Heinz 57 variety Arabs of different races and hues. The Arabs have nothing on SE Asia. It was mostly the influence of China, and India there racially and ethnically plus a residual Australoid groups that make up the whole of SE Asia. The Arabs are no more than small change, peanuts and of no consequence. The Muslim influence in SW Asia (outside of Arabia, the Levant, and Mesopotamia and of course North Africa in Africa) had more to do with the Turkic groups and the Mongols than with Arabians. Even the Anatolian Turks are Muslim because of Turkic speakers like the Seljuk Turks and Ottoman Turks imposing their religion on the natives of Anatolia. As I have implied, the Arabs are boring nonentities vastly overrated even in Europe where most of the Muslims who invaded Europe were native North African Berbers who spoke a pidgin of Arabic.

    Southwest Asia which includes Iran and Afghanistan is not really Arab influenced, otherwise they would speak some type of Semitic language based loosely on Arabic like Tunisians or Egyptians. The Arabs did not extend much beyond the trade ports of what is now Pakistan, India and Zanzibar. The Dutch and Portuguese had more effect in SE Asia, and contributed to the spread of Christianity there and mixed race groups. Indonesia was Islamised from India as it was previously Buddhist then Hindu from India. Check the Malay/Indonesian languages to see the large number of words from Indian languages.

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