Home • Postia stiptica OMC1664 v1.0
Postia stiptica fruiting on fallen spruce
Postia stiptica fruiting on the base of a fallen spruce trunk, Finland (collection Otto Miettinen 21876). [Photo credit: Otto Miettinen]

This genome was sequenced as part of the JGI CSP "1000 Fungal Genomes – Deep Sequencing of Ecologically-relevant Dikarya" project. Within the framework of this project, we are sequencing keystone lineages of saprophytic, mycorrhizal, and endophytic fungi that are of special ecological importance. Dozens of sequenced species were harvested from Long Term Observatories to serve as the foundation for a reference database for metagenomics of fungi and for a comprehensive survey of the soil fungal metatranscriptome.

Postia stiptica OMC1664

Postia stiptica is a brown-rot polypore that grows in dying and dead conifer trees, less commonly on deciduous trees. It has been reported to be a weak pathogen (Niemelä 2016), but is mostly found fruiting in stumps and bases of fallen trees, even on roots. The fruiting bodies are white, pileate, rough on upper surface, and extremely bitter in taste. The species is common throughout the Northern Hemisphere in coniferous forests.

Postia stiptica is the first genome from the family Dacryobolaceae in Polyporales (Justo et al. 2017). Despite its name, it is not closely related to Postia placenta (=Rhodonia placenta). Relationships of major clades of brown-rot Polyporales are still poorly understood, and this genome will help to clarify them. It is, for instance, not clear if all brown-rotters of the Polyporales have a common origin or whether the habit developed several times in the order. This genome will offer a point of comparison to other Polyporales brown-rot genomes in studying molecular mechanisms of brown-rot.

The genome strain originates from a polysporic culture made from a fruiting body growing on recently fallen trunk of spruce (Picea abies) in Helsinki, Finland.

The 1KFG project is a large collaborative effort aiming for master publication(s). Please do contact the PI for 1KFG - Deep Sequencing of Ecologically-relevant Dikarya (Dr. Francis Martin) for permission prior to the use of any data in publications.


  • Justo A, Miettinen O, Floudas D, Ortiz-Santana B, Sjökvist E, Lindner D, Nakasone K, Niemelä T, Larsson K-H, Ryvarden L, Hibbett DS (2017) A revised family-level classification of the Polyporales (Basidiomycota). Fungal Biol 121 (9):798-824. doi:10.1016/j.funbio.2017.05.010
  • Niemelä T (2016) Suomen käävät - Polypores of Finland. Norrlinia 31:1-430