Parapristionchus genome volume III
Nematodes such as Caenorhabditis elegans and Pristionchus pacificus are powerful models for associating phenotypes to genotypes.  However, exploring the evolution of identified genetic loci requires a robust phylogenomic framework. Here, we present an updated genome of the nematode Parapristionchus giblindavisi which is the only known member of the sister group of Pristionchus.  Reassembly of previously generated PacBio reads combined with new Hi-C data resulted in a chromosome-scale genome assembly of six major scaffolds spanning 302.5Mb. Comparative genomic analysis showed that the autosomes mostly correspond to individual Nigon elements whereas the sex chromosome represents a fusion of Nigon elements D and X. The further improved P. giblindavisi genome will be useful as an outgroup for dating and polarizing lineage-specific genomic signatures.