ArticleG3 (Bethesda, Md.)2026
A chromosome-level reference genome for the colonial marine hydrozoan Podocoryna americana.
Article in G3 (Bethesda, Md.), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cnidarians are important models for studying the evolution of animal development, regeneration, cell type differentiation, and allorecognition. The marine hydrozoan Podocoryna americana is related to the well-established model species Hydractinia symbiolongicarpus. Although both species possess a sessile polyp stage, P. americana differs in that it also has a free-swimming medusa (jellyfish) stage in its life cycle. We used a combination of PacBio CLR long-read and Illumina Hi-C short-read genome sequencing to produce a chromosome-level genome assembly for P. americana. The final assembly is 327 Mbp in total length with 17 chromosome-scale scaffolds representing 98% of the assembly. Comprehensive functional annotation with BRAKER3 generated a total of 19,085 predicted protein-coding genes in this assembly, covering 91.2% of the metazoan BUSCO gene set. Comparison of the P. americana genome to other chromosome-level cnidarian genome assemblies revealed a high degree of macrosynteny conservation, and ortholog identification and gene family evolution analysis identified 522 expanded and 1,026 contracted gene families in P. americana. This high-quality, chromosome-level genome assembly of P. americana will be an invaluable resource for researchers studying the evolution of development, regeneration, and allorecognition in cnidarians and other metazoans.
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