Table 5.
Spatial genetic structure, Sp statistics and estimates of gene flow distances in four eastern white cedar populations
| Region | Population | ^F1 | ^F2 | ^F3 | ^F4 | ^F5 | b-log (^bF) | Sp | Nb | σg (m) (De/D = 0.1) | σg (m) (De/D = 0.5) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Core | ED | 0.047* | -0.013* | -0.001 | -0.001 | -0.008 | -0.017* | 0.018 | 56.73 | 98.29 | 43.96 |
| PA | 0.015* | 0.004 | 0.006 | 0.008 | -0.013 | -0.009* | 0.009 | 106.41 | 119.98 | 53.66 | |
| Peripheral | CL | 0.045* | 0.023* | 0.003 | -0.008 | -0.005 | -0.015* | 0.016 | 64.00 | 167.32 | 74.83 |
| RL | 0.070* | 0.027* | 0.026* | 0.015* | 0.014* | -0.029* | 0.031 | 32.08 | 103.14 | 46.13 | |
| Average core | 0.031 | 0.004 | 0.003 | 0.004 | -0.011 | -0.013 | 0.014 | 81.57 | 109.14 | 48.81 | |
| Average peripheral | 0.057 | 0.025 | 0.015 | 0.004 | 0.005 | -0.022 | 0.023 | 48.04 | 135.23 | 60.48 |
^F1, ^F2, ^F3, ^F4 and ^F5: mean kinship coefficient (Fij) [57] between individuals belonging to the first (0-15 m), second (15-30 m), third (30- 45 m), fourth (45-60 m) and fifth (60-75 m) distance classes, respectively; b-log (^bF): Slope of the regression of kinship with ln(dist); Sp: statistic defined by the ratio _^bF/(1 - ^F1), where ^bF is the regression slope of the autocorrelogram; ^F1 is the mean kinship coefficient (Fij) between individuals belonging to the first (0-15 m) distance class [20]; Nb Wright's neighbourhood size; σg, estimate of gene flow distance from Sp, assuming different ratios of effective (De) to census density (D); *, significant (P < 0.05)
ED, Edmundston; PA, Perth Andover; CL, Cedar Lake; RL, Rockland