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Fig. 1 | BMC Genomics

Fig. 1

From: Ancestry inference using principal component analysis and spatial analysis: a distance-based analysis to account for population substructure

Fig. 1

a Selection of Admixtures. In a model with 3 admixtures, L2 is the shortest distance between sample A and a centroid of known population (Pop2). Then compare two other closest populations; Pop1 and Pop3 with the distances, S1 and S2, between the closest Pop2 and two other closer ones; Pop1 and Pop3. If S1 and S2 are longer than L1 and L3, respectively, then keep Pop1 and Pop3 in the 3 admixture model. Pop4 has longer distance than other three populations then the Pop4 is not included. b After selecting the closest population (Pop1) to sample B, compare two other closest populations (Pop2 and Pop3). In this case, S1 and S2 are shorter than L2 and L3. Then Pop2 and Pop3 would not be included in the 3 admixture model

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