Whole-Genome Sequencing and Comparative Genomics Analysis of the Wild Edible Mushroom (Gomphus purpuraceus) Provide Insights into Its Potential Food Application and Artificial Domestication

Summary

Scientists sequenced the complete genetic code of Gomphus purpuraceus, a wild mushroom eaten in southwest China for hundreds of years. By comparing its genes to other edible mushrooms, researchers discovered it likely forms beneficial partnerships with trees and can break down some plant material. The study shows this mushroom can efficiently use simple sugars like sucrose and maltose for growth, which could help farmers grow it commercially while preserving this rare species.

Background

Gomphus purpuraceus is a wild edible and medicinal fungus found in southwest China with potential commercial prospects. However, the mechanisms underlying mycelial development and fruiting body formation remain unclear. Understanding the genetic features of this species could facilitate its artificial domestication and food applications.

Objective

To obtain a comprehensive overview of genetic features and understand the potential for food application and artificial domestication of G. purpuraceus through whole-genome and comparative genomics analyses.

Results

A 40.15 Mb genome assembly with 8705 predicted genes was generated. Phylogenetic analysis revealed close evolutionary relationship with G. bonarii. 403 carbohydrate-active enzymes were identified, showing similarity to mycorrhizal fungi. Culture medium optimization showed efficient utilization of disaccharides like sucrose and maltose.

Conclusion

The genome of G. purpuraceus provides insights into its ecological niche as an ectomycorrhizal fungus with some lignocellulose degradation capacity. The findings support potential artificial domestication and commercial development of this species as an edible and medicinal fungus.
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