Nuclear and Mitochondrial Genome Assemblies for the Endangered Wood-Decaying Fungus Somion occarium.

Somion occarium is a wood-decaying bracket fungus belonging to an order known to be rich in useful chemical compounds. Despite its widespread distribution, S. occarium has been assessed as endangered on at least 1 national Red List, presumably due to loss of old-growth forest habitat. Here, we present a near-complete, annotated nuclear genome assembly for S. occarium consisting of 31 Mbp arranged in 11 pseudochromosomes-9 of which are telomere-to-telomere-as well as a complete mitochondrial genome assembly of 112.9 Kbp. We additionally performed phylogenomic analysis and annotated carbohydrate-active enzymes (CAZymes) to compare gene and CAZyme content across closely related species. This genome was sequenced as the representative for Kingdom Fungi in the European Reference Genome Atlas Pilot Project.