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Lactarius subdulcis
Fruit body of Lactarius subdulcis by Francis Martin
Lactarius subdulcis
Fruit body of Lactarius subdulcis by Francis Martin

This genome was sequenced as part of the JGI CSP “1KFG - Deep Sequencing of Ecologically-relevant Dikarya” and more specifically as a part of the Russulaceae Sequencing Project, which seeks to densely sample members of a diverse lineage of ectomycorrhizal (ECM) fungi to examine functional diversity of ECM fungi with a shared evolutionary history. In addition, genomes of species harvested on long-term observatories are providing sufficient taxonomic coverage of fungal genomes to identify and analyze DNA and RNA samples sequenced from environmental samples.

The Mild Milkcap (Lactarius subdulcis), a beech-associated symbiont

The Lactarius genus in the Russulales order is one of the larger known genera of ectomycorrhiza-forming basidiomycetes. Lactarius subdulcis  (Pers.) Gray produces solitary or scattered groups of fleshy reddish-brown to dark cinnamon fruit bodies with a paler buff margin; convex, centre becoming depressed with a small umbo. The presence of lactiferous hyphae in the fruiting body is visible through latex exudation from cut or broken tissue in fresh material. In Europe, this ectomycorrhizal symbiont is commonly found associated with beech trees, but it also occurs under birches and occasionally under deciduous oaks.  It does not occur in North America. The sequenced diploid isolate FM was produced from a fruit body collected in a beech forest in Lorraine by Dr. Marc Buée.

As always, please contact the MGI PI (Francis Martin, INRA) associated with unpublished genomes for permission prior to the use of any data in publications.