Adding the block by host species interaction improved the fit (e (AICmin-AICi)/2 = 5.21 x 10–13) but the proportion of variance explained by this component (4.91% + 2.42%, Additional file 7 : Table S7) was only marginally significant.
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Specialization-generalization trade-off in a Bradyrhizobium symbiosis with wild legume hosts.
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