Figure 4.

Results of the nested cladistic analysis of geographical distance for pP89 haplotypes of Rhizoctonia solani AG-3 from potato. The haphotype designations are given at the top and are boxed together to reflect one-step nested design. Higher-level clade designations are given as moving down the figure, with boxed grouping indicating the nesting structure. Immediately below each clade designation is the clade (D_c) and nested clade (D_n) distances respectively. An S indicates the distance is significantly small at the 5% level, and an L indicates that it is significantly large. For nested clades in which the tip/interior status is known and for which both tips and interior exists within the same nesting groups, the clade name and distances are shaded for interior clades and are left unshaded for tip clades. At the bottom of the boxes that indicate the nested groups containing both tip and interior clades the lines indicated by (Int - Tip)_c and (Int - Tip)_n give the average difference in distances between the interior clades and tip clades within the nested group for clade distances and nested clade distances, respectively. NA stands for non-applicable. The chain of inference for clades with significant historical pattern (e.g. clades 1-1 and total cladogram for pP89 haplotypes) follows the key provided in the Appendix of Templeton [34].