Table 2.

Proportion of rhizosphere microbiota variance explained by the indicated variables and corresponding statistical significance.

Factor	R2	Pr(> F)
Weighted Unifrac
Microhabitat	0.285	< 0.001
Eco-geographya	0.168	< 0.001
Bray–Curtis
Microhabitat	0.221	< 0.001
Eco-geographya	0.129	< 0.001

Levels of the factor Microhabitat are either ‘Bulk soil’ or ‘Rhizosphere’. Levels of the factor Eco-geography are the groups ‘Coast 1′; ‘Coast 2′; ‘Desert 1′; ‘Desert 2′; ‘North’; and ‘Elite’, respectively.

^aAnalysis performed in rhizosphere samples only.