Table 4. The effect of field site, year, growth stage and cultivar on soil ascomycete, basidiomycete and glomeromycete diversity for different taxonomic levels.

		Field		Year		Growth stage		Cultivar*		GM-parent*
		F	P	F	P	F	P	F	P	F	P
Ascomycota	OTUs	0.005/0.004	0.94/0.94	7.80/3.89	<0.001/0.02	12.76/9.16	<0.001	0.65/0.32	0.66/0.91	2.67/0.49	0.11/0.49
	Orders	0.33/0.009	0.57/0.92	7.44/3.56	<0.005/0.03	10.8/13.22	<0.001	0.59/0.52	0.64/0.76	2.74/1.58	0.10/0.21
	Classes	9.30/9.50	0.03/0.02	10.80/9.64	<0.001	6.78/5.76	<0.001	15.58/34.61	<0.001	2.97/2.31	0.09/0.31
Basidiomycota	OTUs	1.803/0.523	0.18/0.47	9.49/6.64	<0.001/0.002	13.84/9.37	<0.001	1.24/1.41	0.29/0.23	0.03/0.02	0.87/0.90
	Orders	0.04/0.002	0.85/0.97	21.85/17.86	<0.001	8.99/6.48	<0.001	1.85/2.08	0.13/0.09	0.19/0.37	0.67/0.54
Glomeromycota	OTUs	14.67/15.04	<0.001	24.48/20.72	<0.001	3.01/2.76	0.03/0.04	1.91/1.63	0.09/0.15	1.91/1.40	0.17/0.24
	Orders	38.22/35.98	<0.001	12.50/9.99	<0.001	2.29/2.13	0.08/0.09	1.91/1.89	0.09/0.10	1.17/1.59	0.19/0.21

^*Only samples where plant was present are included in the analyses.

All diversities were calculated using both Shannon H’ and Simpson diversity indexes and presented in the table as Shannon H’/Simpson diversity. If both P-values are the same, only one value is presented. Diversity index for classes was not calculated for basidiomycetes and glomeromycetes due to low numbers or unevenness of classes. Significant P-values are marked with bold.