"The Corded Ware culture, which is associated with the expansion of Y-haplogroup R1a from the steppes to Central Europe and Scandinavia, yielded samples belonging to H1ca1, H2a1, H4a1, H5a1, H6a1a and H10e. Ancient DNA from the Catacomb culture, strongly associated with Y-haplogroup R1a, yielded samples belonging to H1, H2a1 and H6. "