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Somatic incompatibilities in confrontations between fungal symbionts from sympatric Acromyrmex and Atta colonies plotted against genetic distances calculated using AFLP (A) and microsatellite (B) markers. The size of circles is proportional to the number of times that particular combinations were found. Correlations were not significant (microsatellites: Mantel r = 0.1518, p = 0.2064; AFLP: Mantel r = −0.1034, p = 0.7063). All tests were performed with 99,999 permutations.
