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Thread: What was the amount of the genetic input of Arabs in North Africa?

  1. #61
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    Quote Originally Posted by cali View Post
    Underfitted model. There is no European reference to capture the European ancestry in Tunisians, and therefore the additional layer of West Med. The program has to compensate for this by developing a bias for Samaritans. Hence, with all due respect, the model in every practical sense is misleading. When you start to add European references to capture the European ancestry in Tunisians, the results tend to look like this:

    [1] "distance%=0.42 / distance=0.0042"

    Tunisian


    Mozabite 34.10
    Saudi 33.20
    Samaritan 11.45
    Basque_Spanish 11.10
    Mende_Sierra_Leone 6.85
    Yoruba 3.30

    [1] "distance%=0.4427 / distance=0.004427"

    Tunisian


    Mozabite 34.40
    Saudi 33.20
    Spanish_Cataluna 12.35
    Samaritan 10.15
    Mende_Sierra_Leone 6.75
    Yoruba 3.15
    These results cannot be taken literally. R on the first hand is not a genetic program. R is a statistical programming language. These models presented do not consider any alleles. They consider the scored amount of various calculators (I assume Basal Rich K7) and try do get the lowest mathematical distance. Some people are making conclusions like "Samaritan is used as a population by the program, so that indicates "Iran Chalcolithic" like ancestry which shows that they have a Near Eastern input.", that is not the reason why Samaritan is taken (also not why Saudi is taken), the reason is the high shared amount of the same component (the "Basal" (or Natufian) component.

    Clearly NAs have recent Near Eastern input, however the amount is not as shown in the model (which would be more than 40%).
    Last edited by mephisto; 02-01-2018 at 06:01 PM.

  2. #62
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    Quote Originally Posted by cali View Post
    Underfitted model. There is no European reference to capture the European ancestry in Tunisians, and therefore the additional layer of West Med. The program has to compensate for this by developing a bias for Samaritans. Hence, with all due respect, the model in every practical sense is misleading. When you start to add European references to capture the European ancestry in Tunisians, the results tend to look like this
    I dunno if they really have that much Iberian admixture but thanks for the share. I really did think the Samaritan score was too high and your amounts make a little more sense, I suppose. Also helps explain what was missing in the fit (was wondering why the fit was as high as 0.6). Thanks for the share.

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  4. #63
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    if arabs exist in the maghreb do they come from 11th invasion ? and today be mixed with natives berbers population ?

    Arab-Berber articles on english wikipedia (sorry but i couldn't post complete link on the thread maybe a bug )

    en.wikipedia.org/wiki/Arab-Berber

    "in addition, Banu Hilal and Sulaym Arab tribes originating in the Arabian Peninsula invaded the region and intermarried with the local rural mainly Berber populations, and were a major factor in the linguistic, cultural and ethnic Arabization of the Maghreb."
    Last edited by dark-mysterio; 03-11-2018 at 08:56 PM.

  5. #64
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    distance%=0.649 / distance=0.00649

    Tunisian

    Samaritan 42.20
    Mozabite 39.25
    Saudi 8.30
    Mende_Sierra_Leone 7.60
    Dinka 2.65

    [1] "distance%=0.42 / distance=0.0042"

    Tunisian

    Mozabite 34.10
    Saudi 33.20
    Samaritan 11.45
    Basque_Spanish 11.10
    Mende_Sierra_Leone 6.85
    Yoruba 3.30

    [1] "distance%=0.4427 / distance=0.004427"

    Tunisian

    Mozabite 34.40
    Saudi 33.20
    Spanish_Cataluna 12.35
    Samaritan 10.15
    Mende_Sierra_Leone 6.75
    Yoruba 3.15
    Bottomline, North Africans hold an undeniable genetic input from the Middle East; you take the Samaritan genetic away; Saudi genetic replace it; you take the Saudi genetic away; Samaritan genetic replace it; Middle Eastern genes is embedded into modern North Africans and these results prove it. If anything E-M81 might have originated in the Levant rather than East Africa.
    Last edited by Missouri1455; 09-16-2018 at 05:47 PM.

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