Table 2 Estimates of spatial genetic structure (SGS) and gene dispersal parameters for two local populations from Cameroon

From: History of the fragmentation of the African rain forest in the Dahomey Gap: insight from the demographic history of Terminalia superba

Local populations

N

F (1)

b LD (s.e.)

Sp

D (ind / km2)

Nb

σ g (m) (De = D/2)

σ g (m) (De = D/4)

σ g (m) (De = D/10)

PSWC

70

0.047 *

−0.009* (0.002)

0.009

88.5

80 (13–136)

400 (326–474)

517 (467–567)

817 (488–1150)

PSEC

57

0.018 *

−0.004* (0.001)

0.004

311

197 (67–367)

–

470 (320–620)

670 (549–791)

  1. SGS parameters: N: Number of individuals genotyped, F (1): Pairwise kinship coefficient between individuals separated by the first distance class F(d < 1 km), b LD: regression slope of kinship coefficient values on the logarithm of the spatial distance between individuals, Sp: Intensity of SGS. P-value of Mantel tests between the matrices of genetic and geographic distances: * for p < 0.05
  2. Gene dispersal parameters: D: Density of mature trees t (dbh > 40 cm); Nb: Wright’s neighbourhood size (95% confidence interval); σ g: characteristic gene dispersal distance (square root of half the mean squared parent–offspring distance) (95% confidence interval)
Back to article page