Table 3 Population genetic differentiation (Fst), isolation-by-distance (IBD) and correlations between Fst and altitude differences between populations at eight polymorphic SSR loci in six populations

From: Mating system and population structure in the natural distribution of Toona ciliata (Meliaceae) in South China

Locus

Fst (p-value)

a (p-value)

b (p-value)

R square

\(r ({F}_{st}\), altitude)

TCR17

0.599 (0.0000)

− 4.202 (0.021)

3.155 (0.003)

0.647

0.370 (0.262)

TCR18

0.268 (0.0000)

− 0.433 (0.010)

0.367 (8.81 × 10–5)

0.706

0.382 (0.160)

TCR20

0.302 (0.0000)

− 0.403 (0.027)

0.394 (1.39 × 10–4)

0.685

0.347 (0.205)

TCR26

0.167 (0.0000)

− 0.055 (0.358)

0.102 (0.002)

0.537

0.297 (0.283)

TCR51

0.005 (0.6215)

0.001 (0.767)

0.003 (0.015)

0.403

0.334 (0.244)

TCR78

0.622 (0.0000)

− 4.635 (0.028)

3.497 (0.004)

0.620

0.404 (0.218)

TCR83

0.246 (0.0000)

− 0.255 (0.047)

0.265 (2.44 × 10–4)

0.657

0.366 (0.179)

TCR122

0.207 (0.0000)

− 0.090 (0.265)

0.141 (0.002)

0.550

0.287 (0.296)

Over loci

0.345 (0.0000)

− 0.682 (0.0007)

0.576 (1.68 × 10–6)

0.826

0.349 (0.202)

  1. IBD test was based on the regression of Fst/(1 − Fst) = a + b ln(geographical distance), where a is the intercept and b is the regression coefficient.
Back to article page