Fusarium pseudocircinatum is identified as the primary cause of big-leaf mahogany malformation disease (BLMMD) in mahogany trees in Mexico, significantly impacting this valuable timber species.
The study assessed genetic diversity among F. pseudocircinatum isolates collected from 611 mahogany trees across four Mexican states, finding high overall genetic variability with 87 unique multilocus genotypes identified.
The high genetic diversity (average 0.147) and significant variation within genotypes suggest ongoing genetic flow and possible historical dispersion routes, particularly between isolates from Colima and Michoacán.