«This confirms previous findings that wild horses were used to restock the population of domesticated horses during the domestication process. (sciencedaily.com)
Following the methods of Durand et al. (30) and Cahill et al. (34), and assuming instantaneous admixture, we can estimate that at least 12.9 — 17.8 % of the genomic variation present in domesticated horse genomes, and potentially as much as 29.4 — 60.7 %, could result from such predomestication admixture or postdomestication restocking (SI Appendix, section S2.7.3 and Table S19). (pnas.org)
The earliest herded horses were ancestors of feral Przewalski's horses but not of modern domesticated horses. (science.sciencemag.org)