Table 3.

Comparison of genetic diversity and population differentiation between Upper Guinea, Dahomey Gap and Lower Guinea for several forest tree species

	Nb. nSSR	Population genetic diversity (H e)				Pairwise genetic differentiation (F ST)
Species		UG	DG	LG	GCR	UG/DG	UG/LG	DG/LG
Terminalia superba (1)	14	0.810	0.752	0.749	0.778	0.022	0.072	0.069
Distemonanthus benthamianus (2)	11	0.522	0.553	0.633	0.689	0.20	0.35	0.22
Symphonia globulifera (3)	5	–	0.770	0.786	0.860	–	–	0.266
Milicia excelsa + Milicia regia (4)	7	0.683	0.600	0.478	0.643	0.15	0.20–0.25	0.12–0.16
Pentadesma butyracea (5)	7	0.57	0.45	0.59	0.69	0.32	0.26	0.42
Erythrophleum suaveolens (6)	9	–	0.651	0.658	–	–	–	0.21
Erytrophleum ivorense (6)	9	0.745	–	0.677	–	–	∼0.09	–

UG Upper Guinea, DG Dahomey Gap, LG Lower Guinea, GCR Guineo-Congolian region

H _e: Expected heterozygosity

(1) This study: for LG we have grouped the three LG genetic clusters (wLG, eLG and sLG)

(2) Demenou et al. (2016): the underlined value is an average over three genetic clusters

(3) Budde et al. (2013): underlined values are average over two genetic clusters; GCR: He value was computed without UG

(4) Daïnou et al. (2014): M. regia occurs solely in UG (He value for UG is here for this species only); the DG population (M. excelsa) here includes a few individuals from the semi-deciduous forests of the UG; the underlined value is an average over two genetic clusters

(5) Ewédjè (2012)

(6) Duminil et al. (2013): Cluster SW (in Duminil et al. 2013) associated with DG here is centred on the DG but extends well beyond into the UG and LG. Underlined values are averages over two genetic clusters