Distribution of the 'Yamnaya' genetic component in the populations of Europe (data taken from Haak et al., 2015).

https://www.cambridge.org/core/journals/european-journal-of-archaeology/article/discussion-are-the-origins-of-indoeuropean-languages-explained-by-the-migration-of-the-yamnaya-culture-to-the-west/9E34F625389AF81B7EC16012F1D21FD9