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. 2019 May 30;177(6):1419–1435.e31. doi: 10.1016/j.cell.2019.03.049

Figure 7.

Figure 7

Influence of Native Iberian Horses within DOM2 Domesticates

(A) Estimates of native IBE ancestry in DOM2 horses, based on the fraction of polymorphisms shared between IBE and DOM2 horses relative to Botai and Borly4 horses, and the level of polymorphisms shared between two IBE horses relative to Botai and Borly4 horses. The ratio of these values approximates a minimal boundary for the fraction of genomic ancestry present in DOM2 genomes pertaining to IBE or a closely related lineage. Consistent estimates are retrieved when replacing Botai with Borly4 horses, an ∼5,000 years-old group directly descending from Botai.

(B) Admixture tests. The f4-statistics in the form of (outgroup,[IBE,(DOM2,Botai-Borly4)]) and (outgroup,[E. lensensis,(DOM2,Botai-Borly4)]) are provided. Negative values indicate excess of shared derived polymorphisms between IBE (or E. lenensis) and DOM2. More negative values indicate a more likely contribution of IBE (than E. lenensis) into DOM2. Testing all DOM2 individual genomes provided negative values, except two samples (Saadjave_Saa1_1117 and Friesian_0296A_0), which are not represented and for which other unidentified ancestry components could be present.