Draft Genome Sequence of <i>Phytophthora abietivora</i> , a Root Rot Pathogen of True Firs in Managed Plantations

Phytophthora abietivora is a recently described root rot pathogen of true firs ( Abies spp.) and a major contributor to fir plantation decline in eastern North America. We present a 62.17-Mbp draft genome assembly of P. abietivora generated using Oxford Nanopore and Illumina sequencing technologies. The assembly comprises 2,917 scaffolds with an N50 of 43.8 kb, 99.7% completeness, and 15,906 predicted protein-coding genes, including 1,210 secreted proteins. Single-nucleotide polymorphism analysis revealed extended runs of homozygosity and allele frequency shifts, suggesting dynamic extreme aneuploidy. This reference genome will serve as a critical resource for exploring the evolution and pathogenicity of P. abietivora and developing control strategies. [Formula: see text] Copyright © 2026 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .