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Complete mitochondrial genome of the ectomycorrhizal fungus Suillus collinitus (Suillaceae, Boletales)

Summary

Scientists have successfully sequenced the complete genetic code of a mushroom species called Suillus collinitus, which forms important partnerships with pine trees. This mushroom’s mitochondrial genome is about 77,700 base pairs long and contains genes necessary for cellular energy production. The study reveals that this species belongs to the Boletales group of fungi and provides valuable genetic information that can help researchers better understand fungal evolution and relationships.

Background

Suillus is an important genus of ectomycorrhizal fungi that forms symbiotic relationships with Pinaceae plants and comprises 113 recognized species. Despite their ecological significance, genomic data for Suillus remain scarce, with mitogenome data unavailable until recently.

Objective

To sequence and characterize the complete mitochondrial genome of Suillus collinitus, a taxonomically complex species showing genetic diversity and phenotypic plasticity. This study addresses the paucity of genomic data available for resolving intraspecific discrepancies in S. collinitus.

Results

The circular S. collinitus mitogenome is 77,697 bp with 20.3% GC content, encoding 14 protein-coding genes, 2 rRNA genes, 26 tRNA genes, and 6 non-conserved ORFs. The genome contains 19 group I introns in five genes, with intronic sequences accounting for 32.7% of the entire mitogenome.

Conclusion

Phylogenetic analysis based on mitochondrial proteins clearly places S. collinitus within Suillaceae family of order Boletales, providing molecular evidence for evolutionary relationships. This mitogenome resource supports future phylogenetic reconstructions and species boundary assessments in this taxonomically complex genus.
  • Published in:Mitochondrial DNA B Resources,
  • Study Type:Genomic characterization study,
  • Source: 10.1080/23802359.2025.2576505, PMID: 41169749
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