I can't figure it out where does it 12,6% R1a at Albanians comes from? It does not appear to be slavic since at Slavs the ratio I:R1a is aproximately 2:1. In this case for Macedonians is 27.50:14.20. For Albanians in Macedonia the ratio is 1.80: 12.60. Also Albs appear to have about 10% northern linage
I think I2a-Din was the dominant medieval Slavic lineage, however, R1a also participated back to back. Kind of like E-V13 and J2b for modern Albanians. From what I have read, Gimbutas suspects M458 originated with the Baltic peoples, and was later consumed by Slavic and Germanic tribes.
When it comes to R1a, the most dominant in South Slavs seems to be Z280. M458 has decent proportions in Dalmatia. M458 is believed to correlate to the early Slavic tribes during the great migration and maybe earlier, that was mostly assimilated into Byzantium(in the case of Greece and Albania). M458 is highest in Bulgarians as far as southern Balkans is concerned. If the Avaro-Slavs are responsible for it, then it would have to be either the Baiounitai(settled in central and southern Albania, including northern Greece). Or the Dragouvitai, which settled in Macedonia and North-East Greece. Both were defeated and assimilated by the Byzantines, whilst other slavic tribes became the modern south slavs.
I recently tested FullGenomes as was confirmed M458-L1029*. The asterisk denotes basal L1029, negative downstream. My TMRCA with closest FGC matches was 2350ypb(2 Germans). My closest match is still an Albanian with 1000ypb TMRCA, from Gostivar. We are suspected to form an "Albanian" cluster within L1029.
Personally, from what I have read of historical tribal movements(regardless of Balto-Slavic origins originally) is that East Germanic tribes like Ostrogoths, and Bastarnae, spread throughout east europe of to the Balts. They could have absorbed and brought L1029 much earlier. You also have M458* popping up in Balkars and Nogai in North Kavkaz. It could have come with Avars and Volga Bulgars too. Another possibility is the Varangian Guard, which were "Vikings" hired from the Viking settlment in Kievan Rus. They were eventually conscripted from Russia to the Baltics to Scandinavia. L1029 pops up in England too, which could easily be from Pomeranian Vikings.
My branch is kind of on its lonesome, I have 25 unique SNPs discovered, and one SNP(though very unstable) is suspected to form a novel clade upstream of YP263 which seems more commonly found in Scandinavians, Germans, English(per yfull). Per R1a project admin, YP263 is over represented on Yfull, and that supposedly more samples come from East Europe. YP263(which I am negative for) is considered to be predominantly East Balkan.
Personally I think the science is too early to make any conclusions. Dacians which were still active in the early middle ages, spread up to the Balts. Thracian and Dacian shares some elements with Proto-Baltic as well. I can't see how M458-L1029 was "walled up" like some ******* white walkers in Game of Thrones, and only decided to pop up out of nowhere in the middle ages with Slavs. Seems a tunnel vision view of this line.
Im sure within the coming years as the branches grow, and ADNA starts popping up we will know more. If a study of Arberesh is anything to go by, Modern Albanian Y-DNA distribution changed significantly in the short 500 years. Imagine 2000 years how much these lines changed. Per Arberesh, they had practically no J2b, V13 is still highest, but nothing by comparison to modern distributions. R1b-M269 and I2 and R1a are significantly higher in Arberesh than modern Albanians.
I think alot of what people go off of is fragmented factual science mixed with a shit ton of speculation.
Heres me on yfull btw: My ancestors are from Okshtun i Vogel, very isolated part of Diber Vogel in Albania.