Table 2. Number of AFLP differences and results of the test assessing whether AFLP differences observed between hosts can be explained without an effect of host change.

AMF lines	Number of AFLP differences	Error rate (Er)	Comparison of AFLP differences between hosts
			Expected proportion (Pdiff)	Observed proportion (Pobs)
S3	33	0.011	0.0002	0.0275a
S3a	65	0.025	0.0012	0.0542a
S3b	43	0.012	0.0003	0.0358a
S3c	43	0.007	0.0001	0.0358a
S3d	51	0.008	0.0001	0.0425a
S3e	52	0.027	0.0013	0.0433a
S3f	40	0.016	0.0005	0.0333a
S4	14	0.012	0.0003	0.0117a
S4a	30	0.011	0.0003	0.0250a
S4b	50	0.005	0.0001	0.0417a
S4c	30	0.004	0.0000	0.0250a
Sc1	18	0.018	0.0006	0.0150a
Sc1a	42	0.010	0.0002	0.0350a
Sc1b	34	0.018	0.0006	0.0283a
Sc1c	41	0.014	0.0004	0.0342a
Sc1d	20	0.015	0.0005	0.0167a
Sc1e	22	0.026	0.0013	0.0183a
Sc1f	45	0.008	0.0001	0.0375a
Sc2	31	0.021	0.0008	0.0258a
Sc2c	30	0.008	0.0001	0.0250a
Sc2d	44	0.014	0.0004	0.0367a
Sc2e	26	0.007	0.0001	0.0217a
Sc2f	27	0.011	0.0002	0.0225a

Abbreviations: AFLP, amplified fragment length polymorphism; AMF, arbuscular mycorrhizal fungi.

^aThe probability of P_obs>P_diff is lower than 0.05, in which case we consider that genotypic divergence due to a shift of host must have occurred within an AMF line.