I noticed this interesting slide called “Caught red-handed”, at approximately 45m 17s, where David Reich asserts that sampled Corded Ware populations had many “close cousins” with Yamnaya-related populations “within generations”. The method could also be used, always according to Reich, to identify “who the Yamnaya mixed with to form groups like Corded Ware”.
NOTE. Notice also the the number of new sampled individuals from Khvalynsk, Ekaterinovka, and new Yamnaya groups from Chelyabinsk, Urals, Volga, Don, Moldova, and Romania.
The article refers to the common Meso-Neolithic basis of Ukrainian ancient Indo-European cultures (Mariupol, Serednii Stih) and Central Europe (Funnel Beaker and Globular Amphorae cultures) of the fourth millennium BC. Archaeological materials show that the common cultural and genetic substrate of the earliest Indo-Europeans in Europe was forming from the sixth to the fourth millennia BC due to migration of the Western Baltic Mesolithic population to the east through Poland and Polissia to the Dnipro … Read the rest “Archaeological origins of Early Proto-Indo-European in the Baltic during the Mesolithic”