That's really bizarre... I mean, did Morocco_LN completely lack the indigenous North African componente that was found already in Iberomaurusian (Upper Paleolithic) and is still found in reasonable proportions even today in the Maghreb? Where was it hiding in the Neolithic then? I would expect a lot of Maghrebi ancestry to pull the sample quite a bit away from the Aegean/East Mediterranean populations, let alone Mycenaeans. What is Morocco_LN made of? Is it full of CHG/Iranian and EEF (with WHG included) like the Mycenaeans? What about the minor but non-negligible steppe ancestry pulling Mycenaeans a bit northward toward BA Europe?
I went back to the original paper discussing these samples, Rosa Fregel et al. It is discussed here, and there's a link to the original paper as well.
https://www.eupedia.com/forum/threa...-from-Levant-and-Europe?highlight=Rosa+Fregel
We have to keep in mind that Fernandes is using the samples labeled KEB to measure "North African" ancestry.
"IAM individuals are similar to North African Later Stone Age samples from the Taforalt site in Morocco, dated ∼15,000 y ago (Fig. 2 and SI Appendix,Supplementary Note 6). When projected, IAM samples are halfway between Taforalt and modern North Africans, in the Levantine corner of the PCA space (Fig. 2).
Southern Iberian Neolithic individuals from TOR cluster withSardinians and with other Anatolian and European Neolithicsamples. Moreover, KEB samples are placed halfway between the IAM and Anatolian/European farmer clusters, in close proximity to Levant aDNA samples and also to Guanche samples."
"IAM is composed of the North African component observed in Mozabites. KEB is placed in an intermediate position, with ∼50% each of European Early Neolithic and North African ancestries. It is worth
mentioning that, compared with current North African samples, IAM and KEB do not show any sub-Saharan African ancestry in the MEGA-HGDP ADMIXTURE analysis, suggesting that trans-Saharan migrations occurred after Neolithic times."
So, as far as North Africa is concerned, there seems to be a back migration from the Near East into North Africa, then large amounts of Levant farmer in the Neolithic. There's another pulse from there in the Muslim era, followed by large amounts of SSA at some point, so much so that modern North Africans can be up to 25-30% SSA depending on the era. (There are some who have much less.)
These KEB samples are modeled as about half IAM and half Anatolian farmer.
Now, according to the paper the area inhabited by these people was Morocco and the signal gets weaker as you go east in North Africa, i.e. toward Egypt.
My hesitancy about this is based on the fact that we have no way of knowing how similar the North Africans of the Iron Age or, later, the early Medieval period, were to these KEB people, especially when, in the case of Italy and the Muslim invasion, you're talking about Tunisia. Now, were they KEB like, or modern Amazegh like, or were they modern Mozabite like, or somewhere in between all of those.
As I stated somewhere above, this may also explain the "Levantine" signal in Sicily which has so enthralled some internet pop gen people. It makes a lot more sense than some phantom migration of "Byzantines" from the Levant, of which there is no historical record, just as the high levels of Iran Neolithic in the Bronze Age also negate the need to "blame" this on high levels of migration from this same "Byzantine" migration.
And no, not "everyone" failed to see that migration from the Balkans, in particular Greece, could have, and probably did bring quite a bit of "Iran Neolithic" to Sicily in the Bronze Age. I certainly saw it, and posted about it often. In fact, I proposed even late Neolithic/Bronze Age, and there's some evidence it was already in Sicily in the early Bronze, although it increased over time.