Table 3. STRUCTURE analyses based on 21 introns and associated ΔK values (highest in bold) calculated using the method of Evanno et al. [57], as well as the optimal K value(s) deduced from the “plateau” method of Pritchard et al. [51] (underlined) (Our conclusions based on the results of both methods are highlighted in grey).
| Ancestry Model | Popdata | Allele Frequency | ΔK K = 2 2Sa/b hypotheses |
ΔK K = 3 3S hypothesis |
ΔK K = 4 4S hypothesis |
|||
|---|---|---|---|---|---|---|---|---|
| λ = 1.0 | λ = 0.45 | λ = 1.0 | λ = 0.45 | λ = 1.0 | λ = 0.45 | |||
| Admixture | - | correlated | 31.5 a, b | 27.3 b | 2.2 | 116.5 | 49.7 | 18.3 |
| Admixture | POPID | correlated | 28.7 b | 29.9 a, b | 1736.4 | 4.24 | 17.1 | 691.2 |
| Admixture | LOCPRIOR | correlated | 30.6 a | 31.0 b | 614.4 | 465.9 | 10.9 | 81.3 |
| Admixture | - | independent | 24.8 a | 27.1 b | 4.6 | 4.4 | 154.9 | 14.7 |
| Admixture | POPID | independent | 25.1 b | 26.6 a | 4.8 | 4.5 | 0.8 | 5.9 |
| Admixture | LOCPRIOR | independent | 28.8 a, b | 28.8 b | 1.7 | 3.7 | 13.2 | 13.7 |
| No Admixture | - | correlated | 12.7 a, b | 14.7 a | 0.3 | 0.3 | 0.3 | 2.3 |
| No Admixture | POPID | correlated | 28.0 b | 26.7 a | 1556.3 | 4.2 | 797.8 | 703.9 |
| No Admixture | LOCPRIOR | correlated | 30.8 a | 53.0 a | 1.3 | 1.1 | 4.4 | 3.1 |
| No Admixture | - | independent | 24.0 a | 25.8 a | 585.9 | 2.3 | 14 | 22.9 |
| No Admixture | POPID | independent | 25.5 b | 25.3 b | 4.4 | 3.0 | 5.2 | 11.7 |
| No Admixture | LOCPRIOR | independent | 28.5 a | 27.8 a b | 1.0 | 1.2 | 2.6 | 2.3 |
POPID = subspecies assignment for each individual; LOCPRIOR = consideration of sampling location; “XX”: K = 2 or 3; “XX”: K = 3; “XX”: K = 4; “XX”: K = 3 or 4; “XX”: K = 2, 3 or 4
a: affiliation of the subspecies tippelskirchi and thornicrofti to G. camelopardalis (2Sa hypothesis)
b: affiliation of the subspecies tippelskirchi and thornicrofti to G. giraffa (2Sb hypothesis).