August 20, 2025Phytopathology

Population Genomics of Pseudocercospora griseola Reveals New Groups in the Middle American Clade and the Presence of the Endophytic Bacterium Achromobacter xylosoxidans

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Pathogenicity testing identified ten races of Pseudocercospora griseola from Puerto Rico with moderate differentiation.
Sequencing of 48 isolates revealed distinct subpopulations and high pairwise Fst values up to 0.95 among them.
Phylogenomic analysis utilized 1,260 SNPs, showing significant population genetic structure across the geographical samples.
Detection of Achromobacter xylosoxidans in mildly virulent isolates hints at its interaction with Pseudocercospora griseola and the common bean.

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Population genomics reveals new subgroups of Pseudocercospora griseola in Middle America, suggesting links with Achromobacter xylosoxidans.

Serrato-Díaz et al. (2025) studied this question.

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Population genomics reveals new subgroups of Pseudocercospora griseola in Middle America, suggesting links with Achromobacter xylosoxidans.