Genome sequence reveals key insights into root rot in true firs, suggesting potential control strategies.
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 polymorphisms analysis revealed extended runs of homozygosity and allele frequency shifts, suggesting dynamic extreme aneuploidy (DEA). This reference genome will serve as a critical resource for exploring the evolution and pathogenicity of P. abietivora and develop control strategies.
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Feau et al. (2025) studied this question.
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