IMO, either R1a were always there at Srubnaya but were not elite and overthrew the R1b just in time to gallop off towards India per AIT, or else, R1a arrived there (from where?).A discontinuity between earlier and later steppe populations is also suggested by the shift from an R1b Y-chromosome gene pool into an R1a-dominated one in the Srubnaya (Supplementary Data Table 1). We caution that this does not mean that new populations migrated into the steppe as R1a was also detected in Eneolithic Samara and an outlier Poltavka individual (Supplementary Data Table 1); it is possible that R1a males continued to abide in the Samara region but were not included in the rich burials associated with the Yamnaya and Poltavka elites in the intervening period
Here's the R1b:
Code: Select all
Unique ID Archaeological culture Date (2-sigma) Min Date Max Date Y haplogroup
RISE546 Yamnaya_Kalmykia .. .. .. R1b1a2
RISE548 Yamnaya_Kalmykia .. .. .. R1b1a2a2
I0429 Yamnaya_Samara 3339-2917 BCE 5354 4932 R1b1a2a2
RISE550 Yamnaya_Kalmykia 3334-2635 BCE 5349 4650 R1b1a2
I0439 Yamnaya_Samara 3305-2925 BCE 5320 4940 R1b1a2
I0370 Yamnaya_Samara 3300-2700 BCE 5315 4715 R1b1a2a2
I0443 Yamnaya_Samara 3300-2700 BCE 5315 4715 R1b1a2a
I0444 Yamnaya_Samara 3300-2700 BCE 5315 4715 R1b1a2
I0438 Yamnaya_Samara 3021-2635 BCE 5036 4650 R1b1a2a2
I0231 Yamnaya_Samara 2910-2875 BCE 4925 4890 R1b1a2a2
RISE547 Yamnaya_Kalmykia 2887-2634 BCE 4902 4649 R1b1a2
I0440 Poltavka 2885-2665 BCE 4900 4680 R1b1a2a2
I0371 Poltavka 2875-2580 BCE 4890 4595 R1b1a2
I0126 Poltavka 2867-2484 BCE 4882 4499 R1b1a2a2
I0374 Poltavka 2800-2200 BCE 4815 4215 R1b1a2a