Genetic Genealogy & Ancient DNA (DISCUSSION ONLY)

[Riverman]

I don't think R-Z2103 played any significant role in Dacians at all, as their link to Yamnaya is very weak.
The connection to Noua-Sabatinovka-Coslogeni however is real, since those steppe pastoralists first conquered Wietenberg and were afterwards themselves conquered and assimilated by Gava-Holigrady.
That's where Thracian R-Z93 was coming from. We find it in South Thrace and Himera, side by side with E-V13 with a South Thracian and a Caucasian autosomal profile.
The original ones are known anthropologically and genetically to be very steppe.

Proto-Thracians were not R-Z93 or linked to Noua culture because they were not Iranic-speakers but Balkan Yamnaya speakers.

I don't know if we'll find R-Z2103 among the historical Dacians, although BA Transylvania is irrelevant for this question because Thracians/Dacians are unrelated to it. In any case, Proto-Thracian/Dacians should have R-Z2103.

There is no Proto-Thracian candidate culture with lasting Yamnaya influence. Such a candidate doesn't exist.
As for Transylvania, that depends on whether or not E-V13 will be found there in the Bronze Age.