Table 2. Summary statistics of diversity for 13 nuSSR markers in a) 345 Andean and Mesoamerican accessions of common bean from America and Europe and b) in ‘pure’ (not admixed) Andean and Mesoamerican common bean accessions as identified on the basis of both chloroplast and nuclear markers and by STRUCTURE analysis.

Gene pool	a) All European & American accessions							b) Only American & European “pure” accessions
	n	Na	Rs	ΔRs	I	He	ΔHe	n	Na	Rs	ΔRs	I	He	ΔHe
American
Andean	43	43	3.16		0.65	0.33		37	41	3.01		0.65	0.33
Mesoamerican	46	36	2.61		0.56	0.31		41	36	2.61		0.56	0.31
America all	89	55	4.07		0.97	0.52		78	52	3.94		0.94	0.52
European
Andean	173	44	3.03	0.04	0.67	0.36	-0.08	102	41	2.87	0.05	0.61	0.31	0.06
Mesoamerican	83	42	2.99	-0.13	0.56	0.29	0.06	51	33	2.36	0.10	0.41	0.22	0.29
Europe all	256	48	3.41	0.16	0.89	0.51	0.02	153	47	3.43	0.13	0.90	0.51	0.02
Andean all	216	51	3.63		0.69	0.36		139	44	3.29		0.64	0.33
Mesoamerican all	129	47	3.52		0.63	0.34		92	41	3.03		0.57	0.31
Total	345	59	–		0.93	0.52		231	49	–		0.92	0.52

n, number of samples; Na, total number of alleles; R_s, allelic richness; ΔR_s, loss of alleles calculated as ΔR_s = 1- (R_s Europe/ R_s America), if R_s Europe > R_s America the parameter was calculated as ΔR_s = - [1- (R_s America/ R_s Europe)]; I, Shannon’s information index; H_e, expected heterozygosity; ΔH_e, loss of genetic diversity calculated as ΔH_e = 1- (H_e Europe/America), if H_e Europe > H_e America the parameter was calculated as ΔH_e = - [1- (H_e America/ H_e Europe)].