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  1. #1
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    España y Portugal en modelos simples

    Hola, chicos!


    I will be posting in english since it's easier for me to do so without butchering grammar too much, and also because it opens the topic to whoever might be interested in contributing and discussing. I was interested in making a simple study about the variation of different sources of ancestry within non-Basque Iberian populations, so I made a simple model in nMonte3 using regular/unscaled G25 coordinates with the standard penalty, as advised by Huijbregts. Some people prefer scaled coordinates, but I'm sticking to my guns.

    I'm not striving for exact ancestry proportions, but rather on how these vary across the peninsula. There are multiple ways of making these models, I decided to go by populations from around the Iron and Bronze Ages, however since there are no IA samples form Iberia avaliable, I used a few others as proxies. I'm not dogmatic about the model choice, if you feel these populations should be changed, and a few others added feel free to give your input or post your own models (G25 unscaled, pen=0.001). I'll make a quick explanation of why I used these references before moving on to the results.

    • Italy_Medieval_Collegno_o1 - Since Ryu's report about the Italian study placed the bulk of Imperial Roman samples around modern day South Italians/Sicilians/Greeks, I'm using these individuals as a proxy for Imperial Roman ancestry. It might not be perfect, but it should be close enough for its purpose;
    • Hallstatt_Bylany - Proxy for Celtic-like ancestry in Iberia, I'm keeping this reference for the bulk of Steppe-related ancestry in the model. I'm not expecting pre-Roman Iberians to be exactly like Hallstatt Celts of the Czech Republic, so I'll add something else to compensate;
    • Iberia_Central_CA - So I chose this one. I suppose any Bronze Age Iberian samples without Steppe ancestry would work too, but for some reason I'm getting slightly better fits with this one, hence my choice. I'd wager Hallstatt+Iberia_CA to represent pre-Roman ancestry in Iberia without extra Mediterranean ancestry;
    • Levant_BA_North - Proxy for Levantine ancestry, it's more recent and contains higher Armenia_EBA (which I won't be using in the model) ancestry than Levant_BA_South;
    • Iberomaurusian - I was actually really torn between using this or the Guanche11 sample. The latter is identical to modern Moroccans, but would probably make a lot of sense given it's dated from the 8th century. However it contains Steppe and EEF ancestry, and as a consequence Guanche11 score would vary depending on the other references. I decided to use Iberomaurusian simply because it's a North African-specific source of ancestry and and not related to other groups at all.



    As I said, I'm not dogmatic about this choice of references, it's just a way to start.

    Below are the results for different regions of the peninsula. Keep in mind that some/most references were built with only 3 or 4 samples, so it's best not to take the results too literally. Besides there's personal variation to account for, and so few references doesn't do it enough justice.


    Code:
    [1] "distance%=1.3894"
    
             Portuguese
    
    Hallstatt_Bylany,55.8
    Italy_Medieval_Collegno_o1,24.8
    Iberia_Central_CA,15
    Iberomaurusian,4.4
    
    
    
    [1] "distance%=1.6827"
    
             Spanish_Galicia
    
    Hallstatt_Bylany,54.8
    Italy_Medieval_Collegno_o1,20.6
    Iberia_Central_CA,17.6
    Iberomaurusian,4
    Levant_BA_North,3
    
    
    
    [1] "distance%=1.2435"
    
             Spanish_Extremadura
    
    Hallstatt_Bylany,55.4
    Italy_Medieval_Collegno_o1,21.4
    Iberia_Central_CA,16
    Iberomaurusian,4.4
    Levant_BA_North,2.8
    
    
    
    [1] "distance%=1.5468"
    
             Spanish_Castilla_Y_Leon
    
    Hallstatt_Bylany,65.6
    Italy_Medieval_Collegno_o1,16.6
    Iberia_Central_CA,13.2
    Iberomaurusian,4.2
    Levant_BA_North,0.4
    
    
    [1] "distance%=1.3953"
    
             Spanish_Castilla_La_Mancha
    
    Hallstatt_Bylany,60.4
    Italy_Medieval_Collegno_o1,18.8
    Iberia_Central_CA,17.2
    Iberomaurusian,1.8
    Levant_BA_North,1.8
    
    
    
    [1] "distance%=1.4491"
    
             Spanish_Andalucia
    
    Hallstatt_Bylany,56.8
    Italy_Medieval_Collegno_o1,24.8
    Iberia_Central_CA,15.8
    Iberomaurusian,2.6
    
    
    
    [1] "distance%=1.8151"
    
             Spanish_Cantabria
    
    Hallstatt_Bylany,63.6
    Iberia_Central_CA,20
    Italy_Medieval_Collegno_o1,14.6
    Iberomaurusian,1.8
    
    
    
    [1] "distance%=0.9897"
    
             Spanish_Murcia
    
    Hallstatt_Bylany,53.6
    Italy_Medieval_Collegno_o1,23
    Iberia_Central_CA,18.8
    Iberomaurusian,2.4
    Levant_BA_North,2.2
    
    
    
    [1] "distance%=2.1694"
    
             Spanish_Valencia
    
    Hallstatt_Bylany,66.2
    Italy_Medieval_Collegno_o1,14.8
    Iberia_Central_CA,13.6
    Levant_BA_North,3.4
    Iberomaurusian,2
    
    
    
    [1] "distance%=1.4463"
    
             Spanish_Cataluna
    
    Hallstatt_Bylany,63
    Iberia_Central_CA,17.6
    Italy_Medieval_Collegno_o1,17
    Iberomaurusian,2.4
    
    
    
    [1] "distance%=1.6205"
    
             Spanish_Aragon
    
    Hallstatt_Bylany,61.8
    Iberia_Central_CA,18.6
    Italy_Medieval_Collegno_o1,17
    Iberomaurusian,2.6
    
    
    
    [1] "distance%=1.4115"
    
             Spanish_Baleares
    
    Hallstatt_Bylany,57
    Italy_Medieval_Collegno_o1,28.4
    Iberia_Central_CA,13.6
    Iberomaurusian,1
    
    
    
    [1] "distance%=1.8168"
    
             Spanish_Canarias
    
    Hallstatt_Bylany,54.8
    Italy_Medieval_Collegno_o1,21.2
    Iberia_Central_CA,15.2
    Iberomaurusian,7.8
    Levant_BA_North,1


    Guess that some people are scoring Levant_BA_N by getting a lower amount of Collegno (or the other way around), so I'm not too happy about this choice in particular, it might not be very useful to begin with.
    Hallstatt seems to be highest in the north and dropping as you move away - although I suspect some "Basque effect" might be in play, as they would score high Hallstatt aswell, but because of higher HG ancestry, not necessarily Steppe-related one.
    On the other hand the Roman proxy is clearly higher in the south, and around coastal areas, the Baleares in particular seem to score a very high amount of it.
    And finally, as expected, North African-specific ancestry is higher in the West, and gradually lowers as you move East.

    A simplistic analysis indicates the Portuguese reference as perhaps the least autochthonous of the bunch, increasing as you move close to the north/northeast, although as you'll see below personal variation rules a simple scenario out of the window. It may be a trend, but hardly a rule.



    Edit: Made a list with Colegno+Levant_BA_North for all the above regions
     
    Portugal 24,8
    Galicia 23,6
    Extremadura 24,2
    Castilla y León 17,0
    Castilla La Mancha 20,6
    Andalucia 24,8
    Cantabria 14,6
    Murcia 25,2
    Valencia 18,2
    Catalonia 17,0
    Aragón 14,0
    Baleares 28,4
    Canarias 22,2

    Same, but with the supposed pre-Roman references (Hallstatt+Iberia)
     
    Portugal 70,8
    Galicia 72,4
    Extremadura 71,4
    Castilla y León 78,8
    Castilla La Mancha 77,6
    Andalucia 72,6
    Cantabria 83,6
    Murcia 72,4
    Valencia 79,8
    Catalonia 80,6
    Aragón 80,4
    Baleares 70,6
    Canarias 70,0





    Below I'll post a few results for Portuguese forum members and relatives, just for fun. If you are Iberian and want to be added, just post your G25 unscaled coordinates.
    For reference:
    Ruderico - North-centre
    MrsRuderico - East (next to Extremadura)
    rxavierflima - Northwest
    elisabetenjoaquim - West
    Lusitano - Centre

    Code:
    [1] "distance%=2.4744"
    
             Ruderico
    
    Hallstatt_Bylany,67.2
    Italy_Medieval_Collegno_o1,15.8
    Iberia_Central_CA,13
    Iberomaurusian,3.8
    Levant_BA_North,0.2
    
    
    
    [1] "distance%=1.886"
    
             MrsRuderico
    
    Hallstatt_Bylany,58.2
    Iberia_Central_CA,19.2
    Italy_Medieval_Collegno_o1,15.4
    Iberomaurusian,5.8
    Levant_BA_North,1.4
    
    
    
    [1] "distance%=2.0812"
    
            rxavierflima
    
    Hallstatt_Bylany,60.6
    Italy_Medieval_Collegno_o1,24.6
    Iberia_Central_CA,10.8
    Iberomaurusian,4
    
    
    
    [1] "distance%=1.4475"
    
             elisabetenjoaquim
    
    Hallstatt_Bylany,65.4
    Italy_Medieval_Collegno_o1,15.6
    Iberia_Central_CA,9.8
    Iberomaurusian,4.6
    Levant_BA_North,4.6
    
    
    
    [1] "distance%=2.0187"
    
             Lusitano
    
    Hallstatt_Bylany,62.2
    Italy_Medieval_Collegno_o1,21.6
    Iberia_Central_CA,11.6
    Iberomaurusian,4.6
    Edit2: Same Collegno+Levant_BA_North as above
     
    Ruderico 16,0
    MrsRuderico 16,8
    rxavierflima 24,6
    elisabetenjoaquim 20,2
    Lusitano 21,6

    And Hallstatt+Iberia
     
    Ruderico 80,2
    MrsRuderico 77,4
    rxavierflima 71,4
    elisabetenjoaquim 75,2
    Lusitano 73,8
    Last edited by Ruderico; 02-08-2019 at 07:33 PM. Reason: Added Castilla La Mancha, sorry Manchegos
    YDNA E-Y31991>PF4428>Y134097>Y134104>Y168273>FT17866 (TMRCA ~1000AD) - Domingos Rodrigues, b. circa 1690 Hidden Content , Viana do Castelo, Portugal - Stonemason, miller.
    mtDNA H20 - Monica Vieira, b. circa 1700 Hidden Content , Porto, Portugal

    Hidden Content
    Global25 PCA West Eurasia dataset Hidden Content

    [1] "distance%=1.5077"

    Ruderico

    Iberia_IA,41.2
    Gaul_Velaux_IA,39.8
    Berber_EMA,11.6
    Roman_Colonial,7.4

  2. The Following 16 Users Say Thank You to Ruderico For This Useful Post:

     Camulogène Rix (02-16-2019),  Canarioguanche (02-11-2019),  Cascio (07-29-2021),  Coldmountains (02-12-2019),  Dragan Kjitanoski (10-26-2021),  Drewcastle (02-11-2019),  El Prudente (02-21-2020),  E_M81_I3A (02-08-2019),  Helgenes50 (02-08-2019),  Jessie (02-12-2019),  JMcB (03-21-2019),  Lusitano (06-23-2019),  rxavierflima (02-08-2019),  Shadogowah (02-08-2019),  sweuro (02-08-2019),  Trelvern (03-21-2019)

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