This is the genetic distance from the gene pool of the population of culture. Nothing written about the Y-DnaThose are Y DNA maps. Eastern Yamnaya was a relative of Bell Beaker not an ancestor, which is Yamnaya carried differnt Y DNA. Yamnaya's R1b is a brother to Bell Beaker's R1b not an ancestor.
I mean, that genetically modern Western Europeans are more like corded ware, and not to the eastern yamnaya, according by Balanovsky map. Although, culturally also. In the late BB there is a corded ornament, burial is dead body on its side.CW had R1a, which is only popular in Eastern Europe and
.Scandinavia(Corded Ware territory).
I do not argue with this and do not rule it out.I, and I think most people who believe Bell Beaker R1b is from the Steppe, don't think necessarily Yamnaya contributed ancestry to Europeans. We think close relatives of Yamnaya or Yamnaya did.
Natural selection can change pigmentation. Therefore, pigmentation isn't good evidence. A pigmentation change is documented in Baltic countries. Baltic Corded Ware was relatively dark, but their descendants 2,000 years later were as pale as modern Balts.
This is the result of sexual selection, according to anthropologist Peter Frost. This is a unique event that occurred in a short time in the late Paleolithic among mammoth hunters. With a shortage of men, lighter women, which more sexually attractive and preferred, and therefore give more offspring.
http://www.ehbonline.org/article/S1090-5138(05)00059-0/abstract
Hence the variety of colors among descendants of these populations. There are no other such cases. Therefore, there is no reason to think that a dark pigmentaion of the Yamnaya will suddenly turn out fair.