Neighbor-joining phylogenetic tree showing the relationship among the AMF sequence types obtained in this study and sequences from cultured AMF species. Bootstrap values of >70% are indicated at the nodes (1,000 replicates). The cultured AMF species that are most closely related to each sequence are included. Individual clones are identified by turf sample (a, turf sample A; b, turf sample B; c, turf sample C), plant species (f, F. ovina; p, P. lanceolata; h, H. pilosella; l, L. corniculatus; t, T. repens; o, O. repens), and plant organ (r, roots; n, nodules). The total number of clones attributed to each sequence type on the basis of their RFLP patterns is indicated in parentheses.