Table 3.

Spatial distribution of mating types for selected PAC populations

Species	Study site	Number of strains	Fraction of grid points with only one strain	Number of grid points with > 1 strain	Number of grid points and identified mating types			Association	chi-test	significance1
					MAT1-1	MAT1-2	both	[Q]
P. europaea	Bödmeren	28	0.65	6	7	8	2	0.33	18.75	*
	Creux du Van	135	0.26	35	21	15	11	-0.03	4.41	*
	Zürichberg	129	0.24	42	20	21	14	-0.22	3.60	n.s.
	Scatlé	35	0.21	11	2	6	6	0.94	14.54	*
	Derberence	186	0.19	51	9	30	24	-0.01	5.11	*
P. helvetica	Zürichberg	40	0.64	10	20	6	2	-0.13	12.16	*
P. subalpina	Bödmeren	80	0.46	22	5	25	11	0.49	4.92	*
	Derberence	36	0.70	7	9	12	2	-0.03	12.80	*
	Scatlé	115	0.30	30	17	11	15	0.43	3.61	n.s.
CSP13	Creux du Van	43	0.61	9	7	13	3	0.25	12.06	*

¹ * = significant at p < 0.05; n.s. = not significant