Higher fine-scale genetic structure in peripheral than in core populations of a long-lived and mixed-mating conifer - eastern white cedar (Thuja occidentalisL.)

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	σ_g (m) (De/D= 0.1)	σ_g (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

ISSN: 2730-7182